What causes oil in the TB?? [Archive] - GrandAmGT.com Forum


View Full Version : What causes oil in the TB??

06-17-2005, 03:31 PM
workin on my brother's 94. Its a POS but im tryin to get it back to decent running condition. I looked at the TB and its caked with oil. I look inside towards the intake manifold and the walls are caked with oil too. Not a caramel looking color, but almost pure oil. What are the causes and is there an easy clean that I can just spray in there??

06-17-2005, 04:10 PM
PCV oil dealy + EGR gases = 1 nasty TB and intake mani

EDIT: pcv is NOT plastic piping

06-17-2005, 04:24 PM
what he said. check pcv, egr. most likely your culprits.

06-17-2005, 04:36 PM
hmm... any ideas on clean up?

06-17-2005, 04:43 PM
I use carb cleaner

06-17-2005, 04:45 PM
Is it ok for carb cleaner to actually go into/get sucked into the manifold/engine?

06-17-2005, 04:49 PM

06-17-2005, 04:51 PM
PVC for sure, I'd use brake clean on the TB and leave the intake alone unless you want to remove it to clean it correctly


06-17-2005, 08:00 PM
carb clean it like a mofo. its fine if it gets sucked into the engine.

06-18-2005, 12:01 AM
Awesome. Emptying a whole can into it tomorrow then... thanks guys.

06-18-2005, 01:26 AM
That cake up crap happens. Any stock engine will do that no matter what year-model or motor. Its caused by EGR, the PCV system and sometimes backfires.

Nothing to be really worried about because air flows around all that. In a carbeurated motor it doesn't happen because fuel cleans the walls of the intake on its way to the cylinders.