It's not coming out as steam its shooting out as a cold liquid and has no smell. It has left me stumped. hopefully someone will know. Thanks in advance. Posted using the Full Custom H.A.M.B. App!
its just carbon and condensation. may need a carb adjustment and a timing check. may be running a tad rich.
It could also just be condensation washing out previous carbon deposits. If you aren't running rich, don't be too alarmed that this happened. It's more annoying than anything else and maybe replacing the muffler and tailpipe will catch that before it comes out the back end.
Years ago many people did not drive their cars long enough to get up to operating temp. Or they drove them very slow.. So we used the term "Blow the suet or carbon out" Most of the time a Mechanic or helper would take the car out for a fast drive. If you had a mountain or long hill this made it easier.. Nothing to worry about.
It takes 10-15 miles for an exaust to clear if in a cool climate. Freeway driving will help. Short runs and condensation sits in silencers as well carbon. New fangled cars with CATs and particulate catchers have a problem if only used as a runabout, they block up and sensors don't get the right readings. Who needs sensors? Give it a good blast n should be good!!
It needs what we used to call "An Italian Tune Up". Get it out on the interstate and break the law for as far as you can. Of course all the safety recommendations apply.
I see this a lot up here in my neck of the woods when the temps start to cool down. Customers complain about a lot of "white smoke" when they start their car first thing in the morning but it goes away after it warms up, or like what you have said here a lot of black liquid coming out of the tail pipe. It is absolutely normal, nothing to freak out about. Get the vehicle up to operating temperature and drive it around a bit to get the exhaust nice and hot to evaporate all of that crap. Otherwise the moisture will hang out in the exhaust and cause premature rusting, especially around any joints that may be clamped together rather than welded. Most modern mufflers have what is called a "weep hole" to allow moisture to drain out, and it wouldnt hurt to drill a small 3/16" diameter hole in the very bottom of the tail pipe just after the muffler to aid in draining as well (it wont hurt anything and you wont be able to see it).
It's just carbon caca and condensation as others have said. My 61 has that and it stains the driveway when warming it up I just installed new Brockmans and tailpipes, so we'll see how long it takes for my pipes to get black again.
Im glad someone asked the same question. I have the same problem and it has been bothering the shit out of me. Hasn't looked like I had water in my oil, or oil in my water, and no noticeable drop in either. Here is the question I would like to add. I have an old mid 80's motor with 55K miles that was fairly well maintained. I pulled all the EGR crap off. When I dropped in my chevy I was building, it has all new exhaust pieces. Where is all this liquid soot coming from, and how long should it last? I had a pretty good run from home to the HAMB drags, about 3 hrs each way. I would have though that would have taken care of it ?
Back in the 70's a friend of mine had a small block Chevy doing the same thing. He just knew there was something amiss. Took the engine apart and didn't find a thing wrong.
Guess im like your friend. Not a good mechanic at all, but want to know the reason behind it. It doesn't "just appear", or everybody would have this issue!
I'm old enough to remember both Jed and Frank. Maybe the Mothers will play a gig out by the cee-ment pond.
Water coming out the exhaust during warm up is normal. Black water is not. It could be a rich condition or an oil burning situation. Had the same situation with the motor in my 50 chevy. Decided it was time to rebuild it, not just because of the black stains on the garage floor, it had other issues. After the rebuild the water that comes out at warm up is clear.
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