My 91 Accord SE with 160,000 miles is leaking oil on the exhaust downpipe. After warmup this produces large volumes of smoke from the under hood area. The leak does not appear to be coming from the oil filter or from the valve cover - I've already replaced the valve cover gasket including the spark plug grommets. I've also replaced the PCV valve. Any ideas where the engine oil could be leaking from?

 

perhaps the oil pan?

 

the head gasket

 

Oil was coming from the engine side of the oil cooler. There is an O ring that that is apparantly a trouble spot on 90-93 Accords. Replacement was a simple 20 minute job with a $4 dealer list part. Decided to post follow up so others might be able to find this in search.

 

Heres a how to article I found.

It looks pretty simple.

 

it is a very simple job.......make sure that the engine is cold before you do it ,, or you might get burnt

Also,, i want to say thanks for finding the autozone site it has a lot of good informations and How Tos.........

Oh yeah......... WELCOME to HAF

 

I will bet money its your oil pressure sensor...as the car ages...and the block heats up and cools off the seal of the sensor gets bad and cracks..if left leaking can cause a big leak...this is most likely ur problem..if thats not it then i would have to say a rear main seal..which means tranny comes out to replace..and a pain in the ***...but check the oil pressure sensor..

1-remove the oil filter
2- look above the filter seat
3- find a wire with a black cap to it heading into the block
4- look for oil seapage

also look along a black cooling tube running along the back side of the block..it will cause oil to fallow that and leak down by the timing cover and onto the transmission....
good luck and happy hunting....lol

 

or it could be the oil filter housing.

 

Good article you found there. I'm always telling people about there service pages at AutoZone also..

WheelBrokerAng [sm=americanasmiley.gif]

 

guys........he already said what the problem and the fix was.......

he said it ws leaking from the cooler o-ring and that he replaced it already and problem is fixed..