VWDiesel.net The IDI, TDI, and mTDI source.
Engine Specific Info and Questions => IDI Engine => Topic started by: Cadbury on January 20, 2023, 10:50:38 am
-
So, I have been meaning to get my car on a lift since I bought it a month ago and FINALLY did it today. I have been chasing thick smoke when the fuel pedal is pressed and today I found that there is oil dripping from the exhaust pipe (PO removed the muffler). At first I thought it might be fuel, but it's too thick and too black to be that. I realize this is not good and wanted to know what the primary reasons could be. I did a search, but all I could find were posts related to TDi's, which mine is not. I realize valve seals/guides or piston rings are a possibility. The car seems to run and idle well, just produces a lot of smoke, and now I know why.
I don't have any history on the car other than the title I had was from the original owner and that he drove it until about 2 years ago.
I do have another engine that came with the car that I could rebuild and just swap it out, so that's not too much of an issue. I am planning on rebuilding it myself, but have a machine shop check out the block and head for any issues. Anything I should be aware of? Where is a good place to buy seals, rings, etc.? I'm not looking to spend a small fortune on it and I don't care about performance, just a stock rebuild.
Thanks!
-
Does your car have a turbo?
-
No turbo. It's a N/A 1.6 diesel. I have seen quite a few posts for the TDi's and the first thing they list is the turbo being the issue, but not in my case. I'm new to diesels and all, but I know oil in the exhaust is not right, especially when it's dripping out! I'm used to gas engines and I would assume they're similar enough to say that it ain't lookin' good when you see that! It wasn't until I got the car up in the air that I was able to see just how bad it was and what brought it to my attention was oil sprayed on the spare wheel well from a leak in the exhaust, it's that bad.
-
Broken piston ring. Unbolt exhaust manifold to see what cylinder exactly is fu.
-
That's what I'm leaning towards, especially since the crankcase vent is pretty dry (for a diesel). At idle, the smoke isn't bad at all, but as soon as I rev it, HELLO, FOG MACHINE!!!
I have another complete engine on the stand that I'll probably due a leak down on to see how healthy it is as I don't know it's history. Either way, IF I keep the car, it looks like I'll be swapping engines sooner rather than later and I MIGHT just go ahead an rebuild the one on the stand to make sure everything is in good shape before I go through the time and effort of installing it.
-
Also, are broken rings that common? I’ve worked on modern diesels (BMW, Mercedes, BW) and never seen this before.
-
Broken rings not so common but they do stick sometimes.
Turn the spare engine over by hand, with a socket on the crank bolt.
If it tries to go backward near the top of the stroke the compression is good.