Oil catch can 4.2 FSI
#1
AudiWorld Member
Thread Starter
Oil catch can 4.2 FSI
Here is the oil catch can I installed. I used a oil/water separator designed for an air compressor.
I cut the PCV hose in half coming out of the valve cover and fine oil separator. Then extended them with high temperature hoses.
I attached the catch can with zip ties to the radiator support for now. So far it has caught a few drops of oil after about an hour's worth of driving. Hopefully this will keep the intake valves cleaner.
I cut the PCV hose in half coming out of the valve cover and fine oil separator. Then extended them with high temperature hoses.
I attached the catch can with zip ties to the radiator support for now. So far it has caught a few drops of oil after about an hour's worth of driving. Hopefully this will keep the intake valves cleaner.
#2
AudiWorld Super User
Do report back on what you “catch” with some miles and hours. I’m particularly interested in the volume of water and related crud. My instinct from Mini experience—with early FSI (DI) and where a fair percentage of catch cans were fit by enthusiasts—is that it is likely the water +oil emulsion combo from cold start that is likely a lot of what gets baked on the valves over time in an FSI set up. Especially where PCV system hasn’t been set up well for it. Hopefully Audi’s fine oil separation (also on my port W12) is a good head start from factory.
#3
AudiWorld Member
Thread Starter
I just checked the oil catch can after 700 miles. Commute to work is 30 minutes of highway driving. Its about an ounce of fluid. The darker top half appears and feels like pure oil, very slick and runny like oil. The lighter bottom half is an oil/water mixture that's slick but very thick and pours slowly.
I checked the hose going to the factory fine oil separator along with the factory fine oil separator, and they were both clean and dry. So the oil catch can is doing its job.
I'd highly recommend everyone to install this. It's very easy and cheap. It cost me about $50 in parts. You can buy better oil catch can install kits for a lot more money. 2008 4.2 FSI oil catch can contents.
I checked the hose going to the factory fine oil separator along with the factory fine oil separator, and they were both clean and dry. So the oil catch can is doing its job.
I'd highly recommend everyone to install this. It's very easy and cheap. It cost me about $50 in parts. You can buy better oil catch can install kits for a lot more money. 2008 4.2 FSI oil catch can contents.
Last edited by Tstealth32; 10-25-2017 at 08:27 AM.
#6
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#7
AudiWorld Member
Thread Starter
There is a breather hose coming off your driver's side valve cover. That's your PCV hose going to your pcv valve. Put the catch can on the hose coming off the valve cover. You will most likely have to buy 3-5 feet of tubing to extend for the new routing.
Someone with a bfm engine will know better on where to put the oil catch can.
Someone with a bfm engine will know better on where to put the oil catch can.
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#10
AudiWorld Senior Member