Oil in my intake!??? - Toyota Nation Forum : Toyota Car and Truck Forums

The Black Camry · 03-14-2006, 02:32 PM

For some odd reason I have oil in my intake but the weird thing is i have no turbo. so what could it be?

TBayToyotaBoy · 03-14-2006, 02:41 PM

It could be residue coming in from a faulty PCV valve. Are you sure it's oil? Maybe it could be carbon build-up...sometimes it forms as a tar-like black substance. A little throttle body cleaner will clean it all out (search this forum and you'll find several threads).

Cyorke · 03-14-2006, 03:29 PM

Yeah probably normal PCV operation. Is it more of a film or is oil actually puddling in the intake. You can have it come from the PCV valve itself or sometimes there is a vent hose on the front of the alve cover that leads directly into the intake tube, instead of eh throttle body and you will get some oil residue from taht also.

Like he said get some throttle body cleaner and spray it out and you should be good to go.

The Black Camry · 03-14-2006, 04:49 PM

no this is actual oil!

Its like if i had a blown turbo. The oil Is actually puddling up!!!!

Gary_602Z · 03-14-2006, 07:08 PM

A broken ring or cracked piston will do the same thing. Take the oil fill cap off while the engine is running. Do you see excessive blowby? Stick your hand over the oil fill for a few seconds and then release it to see if you are building excessive crankcase pressure.

Gary

pk_kk · 03-14-2006, 08:34 PM

Maybe it could be some oil getting through throddle body or somewhere around there.

The Black Camry · 03-14-2006, 08:44 PM

well i diconected the hose that goes from the valve cover to the throtlle body and pressure did build up and some white smoke came out the hose. and the engine wasnt realy warm!... But how could a blown ring make oil puddle up in my throttle?

project92camry · 03-15-2006, 03:00 AM

when was the last time u changed ur pcv vlave. cause if the pcv vlave its clogged pressure will build up in ur engine and force oil up into ur throttle or out your valve cover cause it has no where else to go.

The Black Camry · 03-15-2006, 10:22 AM

which one is the pcv valve?

project92camry · 03-15-2006, 03:40 PM

the theres 2 hoses comming out of the valve cover. the one thats closer to intake manifold. pull it off from the valve cover and that should be ur pcv. if u shake it , it should make a raddling sound .if it dont, then its not working.

73sport · 03-15-2006, 04:01 PM

This has to do with film build up in the plenum and injectors...

Consider this: each time you turn the engine off there are fuel and oil vapors stuck in the intake plenum with no where to go. As the engine cools, they go from a vapor to a solid and stick to everything. Hence the varnish like buildup common to the intake plenum.

Like they said earlier, if both valve covers are not vented - (PCV system not working), your engine may build internal pressure. Once this gets underway, seals and gaskets start to pass fluids, then she gets messy.....

I second that Oil standoff from the filler cap removed (engine running) is a sign of lots of blow by. Do a compression test. Chances are, you have a broken ring or the engines was not cared for in its prior days.

Oh - broken rings allow hot gasses passed the rings into the crankcase on the compression stroke. The PCV system can only handle a small amount of blowby. When it becomes excessive, the vapors turn to solids and you have oil in the PCV hoeses which connect to the intake. Make sense? Hint, a healthy engine will have a vacumm at idle in the crankcase, not pressure.

/ra

southern star · 06-16-2006, 05:46 PM

Hi i have the 98 4cyl and it was using alot of oil so after a lot of tracking back this is what i found, It may help you please ref my post below.
It mabe happening to you as well.
Happy hunting.
http://www.toyotanation.com/forum/t140600.html