I opened up the sir-filter box on my ae82 tiwn-cam last night to discover that the filter had a fair bit of oil on it. If I look up the intake pipe (towards the throttle) I can see that some oil has run down the bottom of the pipe. My question is - where did this oil come from ? Could it be the PCV system? Does this mean that I have lots of blow-by or something? confused
The crank case vent which is on your cam/rocker cover should be plumbed into your intake. If you start revving it hard, particularly if the engine is getting old, the crank case will pressurise and force the air through this breather into your intake. This air will contain oil fumes which condensate in your intake.
The reason why it is plumbed into your intake is because it is illegal to have it venting to the atmosphere (don't want to get oil on the road).
The oil will hamper the performance a small amount, but not much.
If you want it to stop, change your driving habbits or install a filter.
Tue, 18 November 2003 21:26
