I have oil in my throtle body 1993 toyota4runner 3.0L What could it be
IF YOU REPLACED THE HEADS WITH REBUILT/NEW HEADS:
A side effect of increasing compression when you bolt on fresh heads, is broken piston rings. It's beneficial to replace the rings & bearings and at least remove the ring ridge at the top of the cylinder wall if not re-bore when replacing heads due to the higher compression that will cause.
If you just put on a set of used heads.
There's also the chance that the new headgaskets didn't seal completely, (usually due to a problem with surface prep or a warped head/block), but if you've got high mileage, it's usually the rings.
A set of rings can be replaced, but you'll want to make sure they haven't cut into the bore so much as to cause blow-by once new rings are installed. Eliminating the ridge by carefully using a ridge reamer at the top of the cylinder to prevent breakage of the top ring from impact.
Hone the cylinder walls gently & reinstall pistons & new rings!
Mar 21, 2012 |
1993 Toyota 4Runner