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Why I’m removing my HPD Catch Can

Fitting a catch can to a modern turbo diesel is extremely important. I wrote a post some time ago, covering this, and mentioning that I installed a catch can from HPD, or High Performance Diesel. You can read more about this here – Is a Catch Can important on a modern turbo diesel?

Many of you know that I am extremely thorough in my research, and like any products I fit to my Dmax, I spend a lot of time researching and weighing up the pro’s and con’s of each option before I lay my hard earned down. I detest buying things twice, and will pay for a quality product the first time over several cheaper units that don’t work as well.

Even well before buying the Dmax, I was doing research into what people recommended, and catch cans were high up there on the list of first modifications you should do to your 4WD.

I read a myriad of forums, commercial posts, sales spiels and comments from owners of MUX and Dmax’s online. The overwhelming majority of people recommended the HPD, with a few people mentioning the Provent 200 as well. Beyond that though, the HPD unit comes in a complete kit with all the brackets, had a great reputation, was Aussie made and was supposed to work well. There must be thousands of these fitted to various 4WD’s in Australia. They’ve got to be good then, yeah?

Isuzu Dmax Catch Can

The HPD catch can on my Isuzu Dmax

What’s the purpose of a catch can?

The single purpose of a catch can is to filter blow by gasses from the crankcase, and remove as much oil/fuel/water vapour/carbon soot as possible. If you fit a catch can or separator and it doesn’t do this, or it does it poorly then you’ve essentially bought a paper weight. Beyond this, it needs to separate the fluid without creating a pressure drop. In other words, the air needs to flow into the catch can, through it and out the other side with as little as possible restriction, or this can cause other issues.

Catch can efficiency testing

Not long after writing the post, I received an email with a study from Curtin University, where they tested 12 common catch cans for their ability to catch oil, and you know what? The HPD catch can was the forth worst performer. To make things worse, it wasn’t even remotely close to the performance of many of its competitors. In terms of a catch can review, the HPD faired very poorly.

HPD vs Provent

Efficiency vs flow rate, with CF2.1 being the Provent 200 and CC1 the HPD

When I first read the report, I was pretty gutted. I’d blown $385 on a HPD catch can and it was barely working. How could I, and so many people get it wrong in recommending the High Performance Diesel catch can?

In the report, the Flashlube catch can pro, Provent 100 and 200 are the best performers by a country mile. I always suspected the Provent’s would filter a lot more than the HPD, but had no proof. Thinking about it logically, it makes sense. A German engineering company making a catch can with a proper fibrous filter is always going to catch more than a catch can with 4 sets of mesh with an aperture of around 0.5 – 0.8mm on the inlet and outlet. In fact, the results show the Provent catches vapour 5 times more effectively.

In summary though, here’s the catch cans filter quality factor:

  1. Flashlube Catch can (CF 1.2)
  2. Mann and Hummel Provent 200 (CF 2.1)
  3. Mann and Hummel Provent 100 (CF 1.1)
  4. Mann and Hummel Provent 150 (CF 1.5)
  5. Unbranded wire mesh catch can (CF 2.3)
  6. Unbranded fibrous element catch can (CF 1.3)
  7. Unbranded Fibrous element catch can (CF 2.2)
  8. Unbranded wire mesh catch can (CF 1.4)
  9. HPD catch can (CC1)
  10. Taipan wire wool catch can (CC2)
  11. Calibre catch can (CC3)
  12. Mann and Hummel Cyclone with no element (Cyclone)

In terms of pressure drop, capture efficiency and quality factor the Provent 200, and Flashlube take the cake overall.

Catch can comparison

Filter quality comparison between 12 catch cans

Of course, this publication has been put online, and you can read it for yourself here – Catch can study. You will have to sign up to download it, but the report is free. You will get an invoice for $0.00.

In the interest of being completely transparent and sharing everything I’ve learnt, I will mention that the funding for this study at Curtin was provided by Mann and Hummel (the manufacturers of Provent). They paid for a completely independent test to be done, so there would be no conflict of interest.

Provent 100 catch can review

The Provent 100 catch can separator

My independent results

I’ve had the HPD catch can fitted to the Dmax for 27,000km. It was fitted when the Dmax hit 2000km. When I first installed it, the hose clamps supplied by HPD didn’t clamp their new hose onto the OEM barb properly and it did weep a bit of oil out. I fixed it with proper worm drive hose clamps, and have removed all of the oil recently. It’s caught just 65ml of oil. That’s 24ml of oil for every 10,000km.

HPD Catch can inside

The inside of a HPD catch can, with layers of stainless mesh on the inlet and outlet

What does the Provent catch?

By my research, Provent’s fitted to the 4JJ1 motor (same as mine) are collecting 100 – 150ml of oil every 10,000km. That would line up with the 5 x better filtration than the HPD I have experienced!

Obviously, there are a lot of variables at play here – engine oil viscosity and age, engine condition, how the engine is driven and many more. Despite this,  from what I have seen on new 4JJ1 motors (under 50,000km), the Provent catches a LOT more.

Provent separator filter

The Provent separator filter, which is fine fibrous material

Other things to think about

When you buy a catch can, there are other things to consider. Obviously how effective it is at removing vapour is a huge consideration, but  consider these too:

Ease of draining

Before you buy a catch can, look at how they are emptied. The Provent has a drain on the bottom, which most people attach a hose to that comes out near the inner guard. Every so often you get a container under the hose, crack the tap and let it empty.

The HPD catch can has a metal bowl on the bottom which you are supposed to unscrew. There is no chance in the world I can get this undone without removing the catch can. If you have small hands or a filter wrench you can undo it, but the much easier way to empty the can is to suck it out using a big syringe and tube.

Physical size and mounting position

One of the reasons I didn’t get the Provent 200 to start with was their physical size, and where they mounted in off the shelf kits for the Dmax. The only kit that was sold for my model Dmax put the catch can where our secondary fuel filter had to go, which created a problem. If you put dual batteries in your Dmax or MUX you have an even bigger problem, as the Provent, secondary fuel filter and battery all need the same space, so what do you pick?

Of course, I’m more than able to knock up brackets to mount it elsewhere, but the Provent 200’s are seriously big and finding somewhere under the engine bay near the crankcase outlet that isn’t going to interfere with anything else is a mission in itself.

Cost of changing filters

The Provent’s have separators (fibrous filters) that need replacing. The recommendation is somewhere between 40,000 – 75,000km. They are about $80 a pop. The HPD has no filters, and therefore no ongoing costs. You’ll find this is the biggest grudge that people hold who own Provents, but if you take a step back and actually weigh up how much it adds to your overall maintenance bill, its not much. Lets say you replace it every 50k; its $1.6 every one thousand kilometres.

Some people cheap out and install mesh filters into their Provents, or buy the cheap copies. If you do the first, you’ll lose most of its filtering ability, and the latter can result other issues you really don’t want to deal with.

Pressure on the motor

You don’t want to put any back pressure on your motor. This is done by fitting catch cans that don’t allow enough air flow through them, or allowing them to fill up and block up. Hoses (or inlets/outlets) that are smaller than the factory ones are a sure way to identify a catch can not suited to your motor. The Provents are sized based on recommended industrial engine CC’s, at high load.

I have spoken to Mann and Hummel, who tell me the Provent 100 is more than suitable for a standard 4JJ1 motor. That said, if you can fit a Provent 150 or 200 it is a better option in terms of offering longer separator/filter/element life. I would suggest if you have substantially more power and torque than stock, or you work the motor hard (towing something heavy for example) get the Provent 150 or 200.

Provent catch cans come with a relief valve that opens if the pressure builds up too much. HPD have nothing like this, but because the filters are much less fine the chances of back pressure is substantially less. There is a chance of the dipstick on the HPD popping out under pressure, as long as the hose outlets aren’t over the top of it. I don’t know what sort of pressure you’d need to do this though, as they are quite tight around the 0 ring.

Provent 200 review

The Provent 200. All of their units have in built pressure relief valves

Quality of construction

The HPD kit is well made, there’s no doubting that. However, they do lack in some areas:

  • The bracket holding the catch can up rubs on the brake lines unless you bend them over. This could have easily been rectified in the design phase (or at least mentioned in the instructions). I simply bent the brake line a tiny bit.
  • The air intake hose clamp (under the catch can) rubs on the catch can unless you rotate it, which is not mentioned in the fitting instructions.
  • The plate on the bottom of the bracket to make it sit level is not exactly the right thickness (out by around 0.5mm on my vehicle), which puts extra stress on the panels. I have seen a photo of someone’s cracked inner guard where the catch can bracket bolts to. I suspect it is due to the uneven surface, but also because the bracket can move back and forth over corrugations. A lot of people report vibrations/noises coming from the inner guard after fitting a HPD catch can, and I concur with this. Even though they are aluminium, they are still a heavy unit.
  • The hose clamps that came with the catch can was not suitable for the hose they provided. You could easily pull the hose off the crankcase hosetail even with their clamp on, and this meant that oil would weep out as well, all over the side of your motor. I put up with it for a while, but eventually changed the clamps to worm drive ones and it never leaked again.

I can’t comment on the quality of the Provent as I’ve never had one, but they are one of the most common catch cans world wide across everything from light vehicles to heavy machinery.

Where to from here?

I’m not really sure. I feel pretty bummed to be let down by the HPD catch can given how it was marketed to me, but I’m going to remove it and try something else. I was specifically told that these catch nearly as much as the Provents, which obviously is false. In my opinion removing as much oil from the intake is critical on vehicles that run an EGR system, and I want to change it to something else that is going to catch as much as possible.

Ryco have just released a catch can (although I hear its actually bigger than the Provent 200!), and I have heard good things about the Seper8tor as well. I’d like to fit a Provent 200, but will need to spend some serious time trying to see if it will fit, and making up a custom bracket.

There is some more testing going on behind the scenes at Curtin University too, which will hopefully result in some more useful information I can pass along.

Please don’t be upset with the findings

If you own a HPD catch can, I understand you are probably not too happy reading this right now. I’m sorry; I really am. I feel the same way. I write this purely to share what I’ve found. I get no financial incentive either way. You can agree or disagree with what I’ve written; that’s your call. This is just my findings, and the research laid out for you to read. Do me a favour though, and leave a comment below with what catch can you run, and how much oil it catches.

The HPD Catch can is a decent, Australian made product that works, just not nearly as well as some of its competitors.

What catch can do you run? Are you happy with it?

Sharing is caring!

48 comments… add one
  • Cody January 27, 2019, 3:39 PM

    Running HPD on my 200 Series.
    Significantly higher than factory power output and no complaints. Swapped intercoolers and very light film of oil after 25,000.

    We’ve removed both flashlube and provent from multiple vehicles due to restriction with the symptoms you describe.

  • Aaron Schubert January 27, 2019, 3:44 PM

    Hey Cody,

    Good to hear its working for you. Are you referring to the Provent 200 being removed, or a smaller one of their units? The 200’s should have ample flow rates for even a modded 200, unless the filter is overdue for replacement.

    Aaron

  • David January 27, 2019, 4:30 PM

    Wish it included the “Terratuff SEPR8R Oil Catch Can” to see what their results would be.

  • Robert January 27, 2019, 4:32 PM

    Hi, I have a 2018 may dmax. I ask the service desk manager at my Isuzu dealership can I fit a catch can to my dmax. He said ( no) as it will void your Warranty. The oil is needed for
    Lubrication. Basicly I can’t do any mods till my warranty runs out 5 yrs. Cheers

  • Aaron Schubert January 27, 2019, 5:26 PM

    Hey David,

    They are working on it mate; I hope to see some results soon.

    Aaron

  • Aaron Schubert January 27, 2019, 5:28 PM

    Hi Robert,

    If you go to a different dealership, you might find you get a different answer. Your service manager likely knows very little about it. Unless the modification is proven to directly contribute to the warranty claim, they have no leg to stand on. There are thousands of these being fitted to brand new vehicles.

    As long as it is a proven unit, installed correctly it will not void your warranty.

    Aaron

  • Lach January 27, 2019, 6:13 PM

    Running a provent 200 on my 2013 Isuzu dmax am very happy with the build quality and serviceability of the unit. Only drama I had was finding a spot to fit it as I was already running a secondary pre fuel filter which is the location that provent recommend mounting the catch can. Ended up fitting it next to the power steering reservoir

  • Aaron Schubert January 27, 2019, 6:23 PM

    Hey mate,

    Great to hear. Any chance of a photo of what you’ve done? I’d love to fit one on mine

    Take care
    Aaron

  • frank January 29, 2019, 8:37 AM

    HPD on gq patrol.
    works great and is catching heaps of oil. Ill stay with my Australian made product from an Australian company.
    I have friends who have had rear main seals leak or blow out due to running a provent as their back pressure with a dirty filter is very poor.
    The test you refer to is not well done, they are using clean oil in clean filters and not even using a diesel vehicle.
    Ill be sticking with my HPD i think.

  • Aaron Schubert January 29, 2019, 8:47 AM

    Hey Frank,

    Thanks for your perspective. You certainly aren’t the only person who is happy with their HPD catch can, and that’s fine. I can’t comment on the back pressure on your mates cars, but if the filters are changed within the recommended periods and they aren’t allowed to fill up you should never have an issue. That’s what the pressure relief valve is there for.

    The comment you make about the testing has some relevance; its very hard to set up a scientific study that replicates real world conditions. That said, it certainly provides some interesting results

    Aaron

  • Mainey January 29, 2019, 4:39 PM

    I bought the Mann & Hummel Provent only because it read technically better than those fitted with ‘steel’ mesh or net filters.
    I have my Provent connected direct to the DipStick TUBE to empty, so it never needs to be emptied.
    I’ve done probably 40K with it attached and has not been cleaned yet, no oil residue anywhere and no problems that are evident so I will remember to get filter cleaned next service.

  • Aaron Schubert January 29, 2019, 4:55 PM

    Hey Mainey,

    Good to hear you are happy with it mate

    Aaron

  • Mark V January 30, 2019, 1:10 PM

    Provent 200 fitted to 2 litre VW Amarok for about 5 years. Consistenly get 25mL per 2,500 Km.

  • Aaron Schubert January 30, 2019, 1:18 PM

    Hey Mark,

    Good to hear its doing its job mate

    Aaron

  • Mr Poopypants January 30, 2019, 7:47 PM

    Hey Aaron. Interesting stuff. I’ve got a Provent 200 on my PXII 2017 Ranger. 20,000km and have probably emptied about 150-200 mls ?? of water and oil mix from it. Seems to work well. Glad I put it on at new. Very easy to fit the kit from Western Filters, Sydney. People complain about the cost, but to tell you the truth I consider it one of the cheapest, most valuable mods I’ve done. That oil can’t be good going into the turbo. I checked out the aluminium mesh ones but couldn’t see how the mesh could filter as well as the Provent’s. Nice to see some real data on it, though. Thanks for posting it. Cheers PP

  • Aaron Schubert January 30, 2019, 7:52 PM

    Hey mate,

    Good to hear its catching a fair bit. I did wonder about the mesh before I made the purchase, but was told they would catch nearly as much as the provents (by the sales guys) and lots of people raved about them. I guess the masses aren’t always right.

    Take care
    Aaron

  • Bernard January 31, 2019, 5:56 AM

    Hello Gents,
    For further reading on this topic, if you go to Unsealed 4×4 #57 you will find a very interesting comparison of the different catch cans available in Australia.

  • Aaron Schubert January 31, 2019, 6:04 AM

    Hey Bernard,

    Cheers for the comment. Unsealed 4×4 used the same data from Curtin Uni for their article. You can download the finished study here.

    Aaron

  • Paul February 7, 2019, 10:40 AM

    Hi Aaron, I’ve been using a Provent 150 for a few years now on my 2015 Colorado and collected in excess of 800mls in that time. I too wanted to install the Provent 200 but because of the physical size I was unsure where to put it so purchased the Provent 150. The downside to the 150 is you need to be able to fabricate a bracket with an inlet barb, as there is no fitting on the 150 to attach a hose for the inlet, it needs to be mounted to a flush surface. I mounted my 150 behind the ABS module, as I have a secondary fuel filter which took the space behind the battery. There is not a lot of spare real estate under bonnets nowadays.

  • Aaron Schubert February 7, 2019, 4:25 PM

    Hey mate,

    Good work with the Provent 150. Sounds like its doing its job. Any idea how many km’s you’ve done with it fitted?

    There certainly isn’t much room under the bonnets anymore!

    Aaron

  • Paul February 8, 2019, 10:17 AM

    Hi Aaron
    Yeah I’ve done about 50,000Kms since install and recording the oil I’ve drained. I have collected notably less since Holden revised the oil to a different spec of 5W-40 up from 5W-30 which was probably a little thin.

  • Aaron Schubert February 8, 2019, 3:59 PM

    Hey Paul,

    Great to hear. Thanks

    Aaron

  • George February 10, 2019, 6:36 PM

    I manufactured my own bracket to fit a Provent 200 to my NW Pajero diesel.
    The oil return pipe was connected via a one way valve to an oil tube that led directly into the sump.
    As a result I cannot tell you how much oil is being removed but there is significantly less oil film in the inlet manifold.
    After 70,000 klms I changed the paper filter. However I could not tell whether it actually required changing as all seemed OK. The company does not specifically state anything regarding as to when the filter should be changed.
    From my perspective I would certainly recommend the Provent.

  • Aaron Schubert February 10, 2019, 8:34 PM

    Hey George,

    Thanks for your comment. Good to hear you are happy with it. They recommend the filter be replaced every 1000 hours, which is somewhere between 40 – 75,000km depending on how you use it. I would be against returning the fluid to your sump; if you see whats in it, you are better off keeping it separate. You’ll get unburnt fuel, soot and even water.

    Enjoy mate
    Aaron

  • Graham March 9, 2019, 5:46 AM

    I fitted the HPD catch can to my 16 RG Colorado about fifteen k ago. Since then it has only captured about ten millimetres on the dipstick which I find disappointing. Being very familiar with diesels I find this unit very inefficient at performing a relatively simple function. Looks great with well made brackets but not worth the $$$ if it fails it’s basic function.

  • Aaron Schubert March 9, 2019, 5:52 AM

    Hey Graham,

    Sorry to hear mate. You aren’t the only one who though’t they’d perform better. Are you going to swap it out?

    Aaron

  • Colin March 21, 2019, 5:48 AM

    I fitted the HPD to my ’14 RG Colorado about 30oook ago. it has collected about 40 ml in that time but on checking my throttle body and EGR they were really messy with a lot of ‘vegemite’ (I didn’t try it on toast!) on them. I’m very disappointed in the unit and will be looking at either the Flashlube or Provent unit asap. Does anyone want a cheap HPD catch can?

  • Aaron Schubert March 21, 2019, 3:57 PM

    Hey Colin,

    Sorry to hear mate. I’ll be selling my HPD soon too. Not happy either mate

    Aaron

  • Matt March 24, 2019, 6:09 PM

    Thanks for the write up Aaron, great insight mate.

    I just bought a ’13 Triton 4D56 with 109,000kms on it, runs really well but a catch can seems like a modification worth investing in. Was going to go with the HPD unit as a local diesel specialist recommended them, but wanted to find out more first. In brief conversation they said they’re better due to being billet and not needing replacement filters every so often. A lot of Triton owners on forums however, suggest the Provent units and reading this article, the comments, and a bit more online, they seem like the best choice.

    Thanks mate, glad I found this! Will be going with the Provent…

    What’s a good price to pay for an inlet clean (and what other parts should be cleaned?)? Seems like a good move on a motor with those kms before fitting the catch can.

    Cheers,
    Matt

  • Aaron Schubert March 24, 2019, 8:01 PM

    Hey Matt,

    The Mitsubishi motors in particular build up pretty quickly I’m told, so a catch can and a clean is a good idea. The Provent 200 is certainly the pick of the bunch.

    I honestly don’t know what you’d pay for a clean. There are lots of different types out there too; probably physically removing everything and cleaning it would be the way to go. Generally they just unbolt the intake and clean it all.

    Best of luck
    Aaron

  • John April 5, 2019, 5:59 PM

    After lots of web research, I settled on the Provent 200 for my 2014 Mitsubishi Challenger 4D56. On the video, the experts were able to do the fit in 25 minutes – I took a little longer – like 2 hours ! I like to get it right if possible. A long socket extension is useful. The supplied bracket worked well. Make sure that you check the orientation of the hoses before they are attached – the are not designed to adjust easily. I have been advised to check all the hoses for blockages.

  • Aaron Schubert April 5, 2019, 6:08 PM

    Hey John,

    Hopefully it goes well for you. They have a great reputation. Fitment time is usually when you’ve done a few, and are moving. Nothing wrong with taking your time and making sure its right

    Best of luck
    Aaron

  • Andrew April 16, 2019, 12:41 PM

    Hi Aaron,

    Did you consider the FlashLube Catch Can Pro?
    I’m picking up a D-Max from new this weekend and want to make this my first mod before I start putting on too many kms.
    I’m just trying to decide between Provent 200 and Flashlube.

    Cheers
    Andy

  • Aaron Schubert April 16, 2019, 6:21 PM

    Hi Andrew,

    I did, and they have a good reputation. However, the more surface area the better, hence wanting to go for the Provent 200

    Cheers
    Aaron

  • Andrew April 20, 2019, 5:08 AM

    Hi Aaron,

    Good point as they are 50mm higher.

    Where did you fit it? I was going to put the aux battery under the hood but worry now if there is enough room when I put catch can and pre fuel filter in also.

    Cheers
    Andy

  • Aaron Schubert April 20, 2019, 7:37 PM

    Hi Andrew,

    Western Filters have just released a new kit that uses a double mount. It takes the usual pre filter kit as well as a Provent 200. I’ll be getting one of these and putting it in.

    Cheers
    Aaron

  • Ty May 8, 2019, 10:26 AM

    Hi,
    After reading your reviews i decided to go and check my Pro 200 catch can and see just how well it was working. Much to my surprise the car (Mitsubishi Triton) only has 5000km on it and glad i fitted it at 50km. I removed 50ml of water and a lot of oil scum which was Oil and water mixed in the can itself. I Cant recommend fitting one of these if you drive a 4WD Diesel. I bucked the trend with two other mates both fitting the HPD units at a much greater expense. So happy that its stopping all that junk going back into my turbo 🙂

  • Aaron Schubert May 8, 2019, 5:01 PM

    Hey Ty,

    Glad to hear you are happy with it mate. You should compare it to what your friends are catching; it’d be interesting to know!

    Aaron

  • Cookie May 9, 2019, 8:30 AM

    The question still remains how much oil vapour do you actually need to remove to limit the intake clogging problem? There’ll be a point where lowering the oil vapour to carbon ratio significantly reduces the build up. Does the HPD remove enough oil vapour, only time will really tell.
    The design of the HPD is a coalescer rather than a filter to avoid the drawbacks of filters. In particular maintenance cost and pressure build up. A filter is always more effective at vapour removal but has other drawbacks, and I think for effectiveness vs running cost the hpd would be ahead.
    I run a HPD in a 2014 pajero and oil type make a huge difference. I had always run it on “full” synthetic, low vapour oil, and the catch can collected very little. I took it to a different mechanic who put in a mineral based oil (despite our discussion to the contrary, another story) and the catch oil collection went up 10 fold.
    Personally I wouldn’t be so quick to dismiss the HPD product. While I don’t question the authenticity of the data in the report, my guess is the data presented is deliberately chosen to highlight the advantages of filters vs coalescers. I’ve worked in these R&D type organisations and that’s basically how it works, if someone is paying you keep them happy.

  • Lei May 9, 2019, 2:39 PM

    I’m in then same situation, fitted a HPD on my pajero when it was brand new. It’s a great product in anyway except it does NOT collect much oil.

    Looking to prevent as well.

  • Aaron Schubert May 9, 2019, 5:09 PM

    Hey mate,

    Sorry to hear. Shame they don’t catch much oil!

    Aaron

  • Aaron Schubert May 9, 2019, 5:11 PM

    Hey Cookie,

    Some interesting points made. The HPD certainly takes the cake in some areas, and falls woefully behind in others. I’ve seen intakes with Provent’s fitted that are spotless, so no oil getting through is still the best setup.

    You are correct in saying the oil plays a huge role, as does how the vehicle is driven and plenty of other variables.

    I’d be surprised if the results were misleading, but it isn’t real world data, as this is too hard to accurately do.

    Either way, I’m not happy with the HPD’s performance, and will be putting a Provent 200 on and testing how it goes.

    Aaron

  • Rob May 10, 2019, 3:28 PM

    Does not matter what brand of catch can you have or how well it works, what you do is block it off where it enters the intake manifold and the outlet hose from the catch can run it to the firewall and hide the open end in with your heater hose and wrap tape around it so it can’t be seen, you will never get any oil in the intercooler, turbo or manifold ever, problem solved

  • Aaron Schubert May 10, 2019, 4:27 PM

    Hey Rob,

    That is an option, but it’s not legal, and would seem like a waste of money – why not just run it directly there and save yourself nearly $400? By doing that you also remove the vacuum potential from your intake, which makes the air work harder going through the catch can and would increase back pressure.

    Aaron

  • Fred Fels May 13, 2019, 7:05 PM

    I have been told Isuzu does have an original “catch can” or “oil separator” in Isuzu speak.
    These are the part numbers provided to me. Have not checked them out yet but I don’t doubt they are correct.
    Part number: 8-97324682-1
    Filter part number: 8-98002346-0
    These are fitted to their trucks series but not to DMax or MUX range.

  • Aaron Schubert May 13, 2019, 7:29 PM

    Hi Fred,

    Yep, they do. I can’t confirm the part numbers, but they are probably correct. Cheap too, including the filters. It’d be good to know how well they work, and how much work is involved in making up brackets and getting hoses etc

    Aaron

  • neville May 20, 2019, 11:30 AM

    I have an MQ triton with a provent 200 fitted at 1600 km. Now done 8300km. After a 4000km round trip to Adelaide from the gold coast with a new filter fitted, I collected 40mm of oil. Very happy with the performance of the provent so far.

  • Aaron Schubert May 20, 2019, 4:39 PM

    Hey Neville,

    Good to hear mate. They say around 7000 – 10,000 for it to start collecting oil as the filter has to get full first. Keep draining it out and your intake will stay spotless.

    Aaron

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