MK6 GTI Catch Can

[Gezza]

Hi i am new to driving a GTI (always had 304 Holdens ) so i am looking into the catch can setups that are for sale and realised they are quite pricey. IN the holden i could run a catch can from both rocker covers then back into the intake where they would originally be plumbed in setup cost about $80. So i am wondering is there a reason this cant be done on the golfs? have i missed something?

Thanks.

[Gezza]

no one? or does anyone know a cheaper reliable option apart from the big expensive name brands? Thanks.

[h100vw]

They dont need a catch can if the PCV is working normally.

[Gezza]

They dont need a catch can if the PCV is working normally.

Isn't the PCV sending oil into the intake manifold which would be building up on the back of the valves as the Golfs have direct injection? so wouldn't the catch can stop the buildup?

[The_Hawk]

Plenty of people have them and seem to catch a bit of oil too. Something I've looked at installing myself.

The VW specific ones from APR, ECS, Provent etc all do seem to be quite expensive compared to the generic kits. I'm no expert in this space but they do seem like pretty simple systems, so beyond coming with all the hardware designed to bolt in place I don't know that there are huge differences in the more expensive versions.

Here is one discussion on a generic one that was modified and installed in a Golf (although a 118TSI not a GTI). The same concept holds though. (It's also harder to find parts for the 118TSI since most people who want to modify stuff begin with a GTI).
1.4 TSI 118KW Oil catch can

[h100vw]

Isn't the PCV sending oil into the intake manifold which would be building up on the back of the valves as the Golfs have direct injection? so wouldn't the catch can stop the buildup?

I doubt it would stop it completely.

[Gezza]

Plenty of people have them and seem to catch a bit of oil too. Something I've looked at installing myself.

The VW specific ones from APR, ECS, Provent etc all do seem to be quite expensive compared to the generic kits. I'm no expert in this space but they do seem like pretty simple systems, so beyond coming with all the hardware designed to bolt in place I don't know that there are huge differences in the more expensive versions.

Here is one discussion on a generic one that was modified and installed in a Golf (although a 118TSI not a GTI). The same concept holds though. (It's also harder to find parts for the 118TSI since most people who want to modify stuff begin with a GTI).
1.4 TSI 118KW Oil catch can

Thanks for that i guess the only things i will have to look at is a blanking plate in the back of the pcv that heads to the turbo side.

I doubt it would stop it completely.

It might not stop it completely but wouldn't you prefer to try keep the back of the valves as clean as possible?

[volkieboy]

Thanks for that i guess the only things i will have to look at is a blanking plate in the back of the pcv that heads to the turbo side.



It might not stop it completely but wouldn't you prefer to try keep the back of the valves as clean as possible?

Hey I've had the same thoughts as you in terms of the CC but was WAY to expensive to justify. I have found something like this (I'm in a TFSI Golf R so you will need something a lil different to this) for your blocking plate:

TFSI VW Golf Mk5 Mk6 2.0 Audi A3 S3 TT GTI R Billet PCV Delete Plate Bypass Kit | eBay

Seems cheap, but you still need a catch can and all the piping to go with this. I estimate it would cost $150 all up so maybe half the price of the plug and play ones?

If you DIY it take a pic and show us!

[maltbbe]

I did some research into all this when planning out a catch can setup for my mk5 GTI. Another forum member pointed me towards this: Aluminum oil catch tank system 2.0 ea888 engine for audi vw vehicles black fuel tank oil can OCT1111 on Aliexpress.com | Alibaba Group - which is a complete copy of a now-discontinued Forge catch can kit for TSI engines (which retails for ~$600). Whether or not you trust Aliexpress with engine components is up to you - but the really critical parts of this kit are the blanking plate, the boost tap and the washer bottle relocation kit, and since they're all just billet pieces I'm not sure how far you can go wrong.

If I were going down this route, I'd replace the catch can included in this kit with something name-brand with a baffled interior. For my setup on my mk5 FSI engine (which uses different vacuum routing and needs a different blanking plate), I used a Mishimoto compact catch can, which you can find online for about $150 and mounts really neatly in a few different spots in the engine bay.

From personal experience, I'd also warn that this can all get really expensive, even if you're DIYing! Since I couldn't find any imitation FSI kits, I bought a collection of name-brand parts from the US and Gumtree, but with hoses, fittings and a couple of trips to machine shops to get everything to fit, I think it ran me to about $400. I think it's worth it - the can fills up with crud constantly, so it must be doing something - but it should be much cheaper than it is.

[maltbbe]

Actually, I've just had a closer look at that Aliexpress kit, and it looks like the adapter plate included there actually doesn't have fittings for a catch can at all... Compare it to this: CTS TURBO - TSI BREATHER ADAPTER - which has an inlet and outlet port for a catch can. That adapter plate is the most critical part of your setup, so maybe ignore my last post there!

I have a thread on my mk5 catch can install here: Catch can kits for Mk5 GTI? - I think the only critical difference between the FSI and TSI setups is the different adapter plate, so I hope this helps!! 034Motorsport and CTS Tuning have good reputations for quality machined parts, so if you can find an adapter plate and/or boost tap from them that doesn't break the bank, maybe that's the way to go.