blackend tail pipe crud

[BT-22]

One question: Do any of you get a black film of crud on the end of your tail pipe?

I've noticed this since I bought mine. Someone told me that this should not happen on a new vehicle. I use Premium gas and still get the black charcoal film.

I don't agree much with what I've been told since a guy at work has a 2001 Monte Carlo SS and his tail pipes are super black.

Thanks!
BT-22

[whizzer]

Yeah, I have the same stuff on mine. I have heard some things about the motor running rich but, engine emissions are dirty. Bottom line. Look at any exhaust pipe and I bet it will be dirty too. Try some carbueretor cleaner on it if you want to try to clean it up.

[Genthar]

I get a little bit of crud there, not a whole lot. I wouldn't worry about it unless your tailpipe is getting a heavy coat, or if it's appearing on anything else near the exhaust opening (i.e. side panel, etc...)

[BT-22]

Thanks for the response! I'm not all that worried. As long as my engine doesn't start eating up all kinds of oil then i'm ok with a little crud. Just a little though.

Thanks!
BT-22

[tedm]

My 2000 had a black film on it for months and my gas mileage was down, but after they found a cracked exhaust manifold and fixed it, my mileage when up and the pipe is now clean. Just a thought.

[BT-22]

Good idea tedm! I haven't heard any sounds indicating a cracked manifold. My gas mileage is around 14-14.5 mi/gal.

Don't know how good that is?

I think since some GM products have same problem, it might be that Toyota picked up a bad habit from the team work!

Thanks!
BT-22

[BirdDog0]

Indication that your are running rich, or burning oil....

try cleaning everything. Air filter, box, intake tube, throttle body...
run a slightly higher octane if possible too. And every once in a while, say once an oil change or so, get on the freeway and let 'er have it! Burn, and push out some of those deposits and build up.

This age vehicle, under 100K should not be showing ANY signs of soot, smoke or heavy debris at the tail pipe. At 68K, mine's been clean as a whistle...

[BT-22]

Thanks BirdDog,

But I'm already running the highest octane available and I haven't noticed any burning of oil. Oil stays consisten through all oil changes I've done.

That's what's so odd???

BT-22

[BT-22]

ps: there is also no high build-up just some slight amount of soot. no large chunks or anything like that but still some there!

[BirdDog0]

Hmmm. Perhaps maybe your cat converts or muffler are running too hot?? Do you have headers? Maybe your exhaust temps are slightly higher than normal, causing adverse wear to your exhaust internals??

Anyway, if there are no big chunks, and not a whole lot of soot going on, I wouldn't worry about it too much.....

[Drago187]

Originally posted by Black-Tundra-22
Thanks BirdDog,

But I'm already running the highest octane available and I haven't noticed any burning of oil. Oil stays consisten through all oil changes I've done.

That's what's so odd???

BT-22

Higher octane may actually be contributing to the "crud". Octane has a higher combustion point than heptane and in an engine designed for standard octane (more heptane), such as the I-Force, you will actually be extracting less energy per unit of gasolene because some of it won't be combusting. The engine's compression and tuning will exhibit no performance improvement with the 'premium' gas, unless you have modified it in some way to up the compression ratio, supercharged it, etc.

You more likely burning some oil. This could have been caused by holding a constant speed during break-in (which causes a glaze to form on the piston rings and eventally oil blow-by.) It could also have been caused by gunning or racing the engine. Begin measuring your oil volume after an oil change, and compare it to what you put in. If there is a noticable difference, try switching to a heavier weight oil (such as 10-30), the longer molecules in the heavier weight oil will reduce the amount that seeps past your rings.

To answer your first question, my exhaust with 26,000 miles on it looks like the virgin stainless. Hope this helps.

[BT-22]

Thanks Drago 187!

Ever since I bought it it's done that. I've changed my oil all the time since I bought my truck. No burning always check between changes. Stays constant throught.

This is turning to be kinda common on some cars. I've noticed it kinda heavy on a 2001 Chevy Montecarlo SS and some of the Grand AMs and Prixs.

Actually worst than mine!

BT-22

[Joon]

Very little on mine. It's hardly noticable, but if I rub my finger inside the tail, I get those icky black stuff. But it's very little. I use 87 octane. Only been driving little over 1k, so it may be too early to tell if I have problem w/ the tail pipe.

Joon

[BT-22]

That's exactly what happens with mine Joon! No chuncks or stuff like that. Just when I rub inside the tail pipe!

[tammikm]

mine is like that too i put a chrome tip on the tail pipe and the bottom of the tip is all black. is this ok, I think ill mention it when i get my next oil change.