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Engine Oil Catch Cans

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I fitted two baffled catch cans today (one on each breather hose). Very hard to find decent mounting space and I didn’t want to drill any extra holes in the car. What I have done seems to be suitable so fingers crossed. The car only has only done 60km at present so I will update when I do services later on with how much is collected etc. Already a small amount of oil was inside the pcv hose to the manifold so I suspect a lot of oil will accumulate in the manifold over time with no catch cans fitted. BCF8E034-9525-4ECC-A6A5-D3D406C26C5C.jpeg
 
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I will be interested in your results. I expect you may see more oil and water in these catch cans during the run-in process until the rings fully bed in.
Once run-in has taken place I expect the volume of oil / water to be somewhat less than that seen prior to run-in. The ongoing amount of oil / water during the next few years after this is what will be really interesting.
 
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Hello
Just recived this catchcans in perfect size. Almost dont want to say where i bought them. Wish☺️
Next weekend its time for mounting them. Only 22euro a pice
 
BLKI30N said:
I fitted two baffled catch cans today (one on each breather hose). Very hard to find decent mounting space and I didn’t want to drill any extra holes in the car. What I have done seems to be suitable so fingers crossed. The car only has only done 60km at present so I will update when I do services later on with how much is collected etc. Already a small amount of oil was inside the pcv hose to the manifold so I suspect a lot of oil will accumulate in the manifold over time with no catch cans fitted. View attachment 3526
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How did you route the hoses on the second catch can ? I just posted about this in the Veloster N side. My N currently has about 280miles on it and I would like to get cans on it ASAP. But I couldn’t quite figure out the routing on the air box side
 
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I have 6500km mileage on my car and still no oil inside of pipe what goes from cover to intake tube. So my recomendation is to use one for PCV system first and just leve another one untill you will see some oil inside of hose.
 
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TarmoT said:
I have 6500km mileage on my car and still no oil inside of pipe what goes from cover to intake tube. So my recomendation is to use one for PCV system first and just leve another one untill you will see some oil inside of hose.
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But is there really oil in the catch can?
 
There is a mixture of oil and condensation vapour inside of my catch can. The amount of that is not big because we don´t have special racing engines but after each 5000km it still needs attention.
 
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Every single modification (if parts are not sold by Hyundai dealer) will give them option to tell you that you just lost a warranty for that part you modifed. So if you will make changes on suspension, you might loose warranty for suspension but not for el. system, bodywork, interior, engine ect....
 
jeroenvde said:
But is there really oil in the catch can?
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TarmoT said:
There is a mixture of oil and condensation vapour inside of my catch can. The amount of that is not big because we don´t have special racing engines but after each 5000km it still needs attention.
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I ran one on my VT and it was typically full of condensation, oil and other nasty grimey things. After every 3-4K miles. So they do work. Maybe I’ll just put One on the pvc and periodically check the intake one.
 
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It is a VERY good idea to run at least 1 catch can on the lower/front PCV (not the one going directly to the intake pipe). It will help with reducing carbon build up on the intake/valves that most direct injection cars suffer from, as well as catch a lot of moisture that would otherwise find it's way back into your oil reserves.

I will eventually be purchasing another one to run to the rear PCV that leads to the intake pipe just to be safe as well. Also keep in mind you should be checking and emptying these at least every 4-5k KM.

I just bought a universal Mishimoto one for mine, will be picking it up tonight and probably installing tomorrow.
 
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TarmoT said:
Every single modification (if parts are not sold by Hyundai dealer) will give them option to tell you that you just lost a warranty for that part you modifed. So if you will make changes on suspension, you might loose warranty for suspension but not for el. system, bodywork, interior, engine ect....
Click to expand...

So that means yes, add a catch can (and not have the mechanical skills to remove it completely before each service) and you just void the warranty on the engine, nothing else. Hmmm...

I do not know enough about engines to claim as fact that catch cans are any good, or useless, but as tarmot stated, his catch can catches very little, and that very little that is caught is designed to go back into the engine to be burnt up anyway. I have owned internal combustion engines with direct injection for a long time, never had to have my intakes/valves decarboned!

Unless you want to go racing every weekend, I suspect an oil catch can is probably not necessary for the average punter, especially one who turns over his car on a new lease every 3 to 4 years. And if you can't afford $15K for a new engine that fails inside warranty, but the warranty is voided as it has a catch can installed... think carefully before doing this questionable mod with NO performance improvement.
 
Performance Blue said:
So that means yes, add a catch can (and not have the mechanical skills to remove it completely before each service) and you just void the warranty on the engine, nothing else. Hmmm...

I do not know enough about engines to claim as fact that catch cans are any good, or useless, but as tarmot stated, his catch can catches very little, and that very little that is caught is designed to go back into the engine to be burnt up anyway. I have owned internal combustion engines with direct injection for a long time, never had to have my intakes/valves decarboned!

Unless you want to go racing every weekend, I suspect an oil catch can is probably not necessary for the average punter, especially one who turns over his car on a new lease every 3 to 4 years. And if you can't afford $15K for a new engine that fails inside warranty, but the warranty is voided as it has a catch can installed... think carefully before doing this questionable mod with NO performance improvement.
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I'm friends and co-workers with Kia Canada's QA/Warranty technician who happens to have a 2016 Optima 2.0T (from which the N platform cars engine's are based). He has put nearly 70k km on his now (he bought it new), and has had to decarb his intake/valves/head at ~50k.

He then installed a baffled catch can on both PCVs following the decarb. He recently inspected his intake/head and said that buildup was drastically reduced compared to before near the same mileage, and that he needs to empty his catch can(s) every 4-5k km because they're nearly full of oil/moisture by then.

Take that info as you will, I'm just trying to help :)
 
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This is a bit of a minefield. I am leasing my car so cannot modify it anyway. This does impact on if I keep the car at the end of the lease however. Many factors in carbon build up on the intake valves but it seems higher performance turbocharged engines could be affected more that some. VAG engines are known for this even in the non performance sector. Time will tell I guess.
 
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Performance Blue said:
So that means yes, add a catch can (and not have the mechanical skills to remove it completely before each service) and you just void the warranty on the engine, nothing else. Hmmm...

I do not know enough about engines to claim as fact that catch cans are any good, or useless, but as tarmot stated, his catch can catches very little, and that very little that is caught is designed to go back into the engine to be burnt up anyway. I have owned internal combustion engines with direct injection for a long time, never had to have my intakes/valves decarboned!

Unless you want to go racing every weekend, I suspect an oil catch can is probably not necessary for the average punter, especially one who turns over his car on a new lease every 3 to 4 years. And if you can't afford $15K for a new engine that fails inside warranty, but the warranty is voided as it has a catch can installed... think carefully before doing this questionable mod with NO performance improvement.
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This is exactly why I saved the gunk from my catch can. For all the non believers to see the truth lol. This is only one year and about 15k miles of collections from my VT and that car was half the car the N is. And I wouldn’t think you’d have to remove the can for each service. If anything I’d remove it if you had a problem with the engine and needed a warranty repair. Dealers see 100s of cars a week and they’re not going to mark down and cancel warranty if your car comes through with a catchcan. Or Atleast in the states they wouldn’t. I can’t speak for you overseas guys. But in all honesty my dealer has already put engines in cars that had aftermarket exhaust intakes and even one time a guy had his car tuned and still got an engine covered under warranty. The dealer has to prove that the engine failed due to the part you installed and Ive NEVER seen a engine fail solely due to a preventative maintenance item such as a catch can.
 

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