Guys,

Got a 93 chevy truck 350/700r4. Gunned it a little to get into the driveway (snow) and got out to see a pool of oil under the back of the engine. I started it back up and oil just came pouring out of the back of the engine.

Could this be the rear main seal? I read somewhere that the rear main seal isnt exposed to oil under pressure, so higher oil pressure wouldnt have caused the rear main seal to bust. Is this true?

Can you guys help me figure out what it is?

thanks

Look for the oil pressure sender to be broken or if there is an oil line it might be broken.

They will leak out of the rear main but not pour out.

Plug behind the camshaft pop out? Hopefully not but It's possible.

on a 93 it is most likly an oil cooler line. or is it draining out of your bellhousing area ? is it a fresh rebuilt motor ? or one with several miles ?

oil cooler lines? is that the lines going into the oil filter plate?

thanks

does a rear main seal leak just gush out? is the rear main seal under pressure?


thanks

j,
The rear main seal is not under pressure. The oil cooler lines are kind of known for leaking on those trucks. If it's leaking as bad as you say, put a couple of extra qts in it and have someone start it while you are looking under the truck, should be pretty obvious where it is coming from.

well,

I got back under there and although i didnt fire it up, i did see that the oil sending unit and both oiler cooler lines are bone dry...

what else is up in between the engine and bellhousing that could be leaking oil? the top of the engine is bone dry too...

would the rear main seal leak like that (gushing out)?


thanks

jeff

see my reply on Camaro page.

it was the oil filter adapter leaking (which bolts to the block)... new gasket and oil line connectors fixed it.

thanks everyone for your help