I have a 1991 Toyota 4WD with a 22re engine.

There is oil leaking from a bolt next to the crankshaft pulley. I circled it in the photo. Any ideas? Could it be the oil pump O rings?





Oil leaks from around bolt when engine runs.

 

Looks like you or someone replaced the timing chain, cover, etc. It appears maybe it's not torqued enough compared to the adjacent similar bolt.

 

Yeah, that's what I am thinking. This is a rebuilt 22re, I had my mechanic install it last year (cost: $2,000 including new water pump and alternator brushes), so far I have put 12,000 miles on the engine. It seems to new to have the Front Main Seal go out. There are no other oil leaks, overall the engine is looking pretty clean.

What is the torque for this bolt?

 

According to the Toyota FSM for 1993 4Runners and P/U, it's 9 ft-lb. Yeah it's light since the oil pump mounts to the timing chain cover which is aluminum but according to the picture, the washer doesn't look compressed like the other bolt. Good luck and hope this is it.

 

Just make sure the bolt is not bottomed out and cranking down on it does not break the oil pump housing

 

The Timing Chain Cover uses different sized bolts. I wonder if they installed a wrong bolt in there as a possibility.