Help!!! Oil spewing out on boost!!!
 

When I boost up to 14-15psi on second or third I get oil all over my clean motor and its pissing me off. The oil seems to be coming out of the little nipple of the oil feed neck(but not sure) is it normal to have oil coming out of there? is something wrong with the engine? Are the seals bad? People keep telling me to install a catch can, but before I do that I want to better understand why this is happening. If I do install a catch can, should I put six quarts instead of five to compensate?


Thanks


93 FD
single TS04
4x 850
ported

Maybe install a catch can

Did you recently change the oil? If so you may have overfilled. Drain a little oil out and see how you go.

If not, try it anyway.

If it still happens, could be a larger issue :(

I dunno if its like my cosmo motor, but is your oil supply line on the front steel housing? (spark plug side) I could see it being a little loose or having a small crack in it, causing that. But seems like it would do it all the time and not just under boost?

hey could overfilling the oil cause the car to smoke ALOT? if so how would you konw how much is too much?

you may have a broken side seal ,boost leaks thru the side seal and into your oil system and into your pan and out the oil fill neck

If the blow off valve is in the same space the oil could be coming from it. One of my turbos has a porked compressor side seal and when I let off the gas and the intake goes to vac it opens the blow off valve and oil gets shot all over the engine bay.
Kevin

If your run the car without that nipple capped off or not attached via hose to your PCV(/first turbo inlet) then what you are doing is comparable to running without the oil cap. You should expect to get oil on the motor.

I'm no expert, but every car that I have owned has had some sort of crankcase ventilation system. The pressures in the combustion chamber are high and there will be leakage past the seals into the oil side. It's gotta go somewhere I guess. Long time ago I found that autoX and track would push oil up into the filler neck and blow into the intake or turbo when throttle is lifted. I believe I was the first to drill/tap a hole in my filler cap (metal, rotor shaped cap), attach a 90 deg nipple, fab a catch can(ss with vent/filter), and plumb the system up in lieu of the factory PCV/turbo inlet. I figured that the higher in the system I could vent the crank the less oil would be lost. My track buddies did it and it worked, reduces oil consumption on track as well.

Best of luck.