Hi,

Me and a friend were cleaning up our engines and sensors and changing filters etc when we noticed a small lining of oil in base of the air filter housing :/ is this normal? there doesnt seem to be any on the actual filter just in the plastic housing...

Thanks for advice

Pretty normal in any car that takes in crankcase gases back into the system..

Some people fit an oil catch tank in between the hose, to stop it getting to the filter..


John

Thanks mate much appreciated

too many donuts, and too much revvin the stones out of the engine. only way to stop this is by getting an oil catch tank

Do you fit the oil catch tank on the pipe that goes into the air box and just block up the hole in the air box the tube used to go into?

Normally, there is an inlet and outlet on the tanks, which allows it to fit inline, so the fumes are still taken into the engine..

John

Is there any performance gains to not recycling the fumes as its bad air going into the engine?

Will the engine still run smoothly if you vent the gas to atmosphere rather than back into the engine?

You won't notice any performance issues, however if you leave the pipes disconnected, it may appear as an air leak..

The emission system is normally a sealed unit, using a PCV (one way valve) to allow gases out of the engine, but not in..
if the valve is faulty or disconnected, it can give a poor idle and bad running..

John