oil in exhaust

[IndyCuda]

Getting a small amount of oil in the exhaust of te 340  . Engine is pretty stock. I think compression is ok...I don't think it is the block.  Any advice on how to attack this or a way to narrow it down without completely tearing the engine apart?

[brads70]

Pull the plugs to see what cylinder  it's coming from. Maybe simple like a valve seal?

[MEK-Dangerfield]

   


If this engine has some miles on it, or has never been rebuilt, a valve seal is a good guess.   

[BIGSHCLUNK]

I did valve seals in a built 318 I had years ago every 25K miles..... I always new I was time by the way the exhaust looked!

[Super Blue 72]

When do you get the oil?  Do you see oil in the exhaust pipe or do you see puffs of smoke?

If smoke, do you see puffs of oil on start up or acceleration?  Usually valve seals will give you puffs of smoke after you run the car, let it sit for a few minutes, then upon start up you'll see smoke.  Rings usually are the culprit if it's on acceleration.  Valve seals aren't too bad to do.  You can do them without removing the head, just don't let the valve drop into the cylinder.  I did mine in automechanic school many moons ago, not too bad to do. 

[moper]

Where are you seeing the oil? How is it Liquid? smoke?

[IndyCuda]

I see a little bit of smoke while running. I can hold my hand out behind the exhaust and I get a smal amount of splatter on the hand. It isn't teribly smokey, but is pretty smelly when running. It also collects on the back bumper after it has been running.

[Chryco Psycho]

possibly worn valve guides

[IndyCuda]

I was going to wait a bit and get some ported heads in about a year anyway. I think I will save the cash and time and just go ahead and pull the trigger this winter. Might as well just slap on some 308's and a Voodoo cam...should do the trick.

[moper]

What you are smelling and getting on your hands is not engine oil. But unburnt fuel mixed with water vapor and soot in the exhaust. What color is the smoke? White? black/grey, or blue?

[IndyCuda]

That could be I guess. The smoke is kinda blue. I have a holley six barrel. It might be running rich then? It does kackle a bit after I romp on it...I dunno...

[moper]

When does it smoke? Idle? Startup? under load? If it's mostly stock it should idle smoothly. 6bbls can be hard for some people to get tuned well, so it may simply be out of whack a little. Also, it may need something like valve seals or have tired rings... But you still wont see liquid oil out the pipe. So it's not as bad as you might think.

[IndyCuda]

It isn't a heavy smoke it is very light..very light. I find the crap lightly on the rear bumper after a drive. It puts the liquid out at idle. It doesn't eally smoke at load..at least from what I can tell inside the car....

[moper]

I agree with stroker. Have the carbs rebuilt using good kits (I like AED) and have it properly tuned. Many peolpe think 6bbls are "supposed to run that way..." because they always see that spatter on the rear of the cars. They should run clean, especially with stock or mild parts in the engine.

[Moparal]

Yeah, I agree with Moper. My six pack doesnt leave no signs in the tail pipes.  Runs like a regular gas engine.