oil on inside of intake?

bowtiebuba

stangs hate supras
Sep 1, 2005
207
0
0
37
marion iowa
theres oil on the inside of my intake pipe before the turbo, its inside the intercooler and ic pipes also is this comeing from the lines that run from the cam covers to my intake, how do i fix it?
 

Stretch

Tallest MK3 driver ever!!
Mar 30, 2005
1,275
0
36
37
Toronto, Ontario
Ya that oily residue is thanks to the vacuum created by your turbo that pulls the excess oil blowby out of your cam covers, people often use an oil catch can to stop it from building up inside their pipes. You simply re-route the pipes into the catch can, then either vent it to atmosphere or use the vacuum from the intake to help it pull the gasses into the catch can. It sounds like it doesn't do much but since there is now a large container in the path the oil stops there instead of going into the pipes.
eric