L-U-R-C-H

Hey guys I have noticed that around my engine head, it leaves this black dust-like crap around the seam or whatever. Also, around my exhaust tip it is all black. When I revved my engine to redline and looked at the exhaust tip, I could see a very small amount of black smoke coming out. Anyone know what my problem is here?

Absolut

A small amount of black smoke is normal on a Prelude @ redline.
Its running rich, a rich mixture is safe.

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Jason

L-U-R-C-H

Is it also normal to have black stuff around the exhaust tip and around my head?

Brady92/4WS

preludes run rich, when im racing when i shift at redline a little puff of black smoke comes out, or at least thats waht im told

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2.233 60'!, 15.533 at 88.96mph?
I/H/E Konis/Neuspeed Race
.."the Prelude is the best Integra ever made......." - Car & Driver, 1999

L-U-R-C-H

So that's why my exhaust tip is black then, correct? One of my friends told that I would ruin my new GReddy exhaust when I put it on. He said that black stuff would build up in the exhaust and screw it up. Is that true?

Qveon

i puff a little grey smoke when i rev the engine or when it sits for a long time. but it will clear up when i start driving. Any ideas?

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L-U-R-C-H

If your car was sitting for a while, then it's normal for it to blow out grey smoke. I had the same problem. I think it's just condensation in the exhaust.

Qveon

ok like the weather out right now is like 58
so when i roll up to a stop sign and then take off, it puffs out a little grey smoke. sometimes more, sometimes less. i dunno what to think, it really doesn't use any oil so maybe its buring antifreeze? any help is appreciated. I can get pics or video if anyone is interested.

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accolude22

black dust around the head normally menas you ahve an exahsut leak it means carbon is leaking through the gasket and staining the head.
As of the exhasut black smoke is fine never hurts at all jsut means your running rich which is fine at higher rpms. For the grey smoke though I didnt really read oyur post well did your car sit for a while if so like someone else said its just the engine getti ng rid of condensation. As long as oyu dont see any blue in the smoke you should be fine but if problem persists please keep updated I will see what else I can figure out. Hope I helped

Qveon

yea it doesn't smell like oil, just looks like grey smoke.

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brendon2k

The black stuff is carbon and it happens because your car burns gas. Look at the inside part of any exhaust. It is black.

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-Brendon-
09 - Subaru Impreza
07 - Honda CBR 600RR

Brady92/4WS

exhaust happens... and its not gonna build up it will just coat the inside of your greddy exhaust, your friend is an idiot.

__________________
2.233 60'!, 15.533 at 88.96mph?
I/H/E Konis/Neuspeed Race
.."the Prelude is the best Integra ever made......." - Car & Driver, 1999

L-U-R-C-H

So I will probably need to replace my exhaust manifold gasket. Anyone know how much that will cost me?

accolude22

goto hondaautomotiveparts.com and they are roughly 20 something shipped doesnt take long to do and if I can be of any assistance in the process just ask.

L-U-R-C-H

So it's something I would be able to install myself? I thought maybe I would have to take it into some shop and have them do it...