Spitting Oil From Tail Pipe????
08-19-2005, 12:17 AM
#1
Spitting Oil From Tail Pipe???? After I did heads, cam and shorty headers I've noticed what looks almost like oil spitting out of my tailpipes after a cold start. I don't see how it could be oil because my car doesn't blow smoke. It only seems to do it on a cold start. At first I almost thought it was gas because of the smell, but I've had it tuned and it's not running rich. It's leaving little speckled circles in my driveway that look like oil spots. I thought condensation could be mixing with the carbon in the exhaust and turning it black, but there's too much of it for that too be the case. Does anybody have any ideas?
08-19-2005, 03:01 AM
#3
Not very likely to be oil. Reason being, for oil to collect like that it would have to be smokin like a SOB. Also, the hot exhaust would burn up any oil that was in there. It's probiably just condensation like you said. Think of it like a glass full of cold water in a warm room, it will condensate. Well, when you first start the car, the hot gasses from the exhaust hit the cool pipe and cause it it condensate. It goes away after it warms up past the condensation point. That is what I would suspect, but you can always use a paper towel to catch the crap and see what it is. If after 5 minutes it's still wet and slimmy it's probiably oil, if it's dry and powder like it's probiably condensation
08-19-2005, 10:16 AM
#6
My stock short block spit oil out the tailpipe.......but then again it smoked like James Bond's car and every piston had CHUNKS of ring land gone.... 
like they said.....condensation...........might look black because there is carbon being "washed" out with the water......
like they said.....condensation...........might look black because there is carbon being "washed" out with the water......
08-19-2005, 10:54 AM
#7
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Originally Posted by Redneck Z
After I did heads, cam and shorty headers I've noticed what looks almost like oil spitting out of my tailpipes after a cold start. I don't see how it could be oil because my car doesn't blow smoke. It only seems to do it on a cold start. At first I almost thought it was gas because of the smell, but I've had it tuned and it's not running rich. It's leaving little speckled circles in my driveway that look like oil spots. I thought condensation could be mixing with the carbon in the exhaust and turning it black, but there's too much of it for that too be the case. Does anybody have any ideas?
i know what your talking about.... i had the same thing...
go back and check your valve stem seals.... some of mine were not sealed properly.
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08-19-2005, 11:12 AM
#8
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you say you had the car "tuned". What kind of tooning [sic] did you get? If it was just a dyno tune, it's not likely they tuned for part throttle. You could be running rich as hell under part throttle caking up your exhaust pipes, then, when you cold start the car, the condensation is carrying out the excess carbon build up.
08-19-2005, 01:57 PM
#9
Yeah I hope it's condensation. It makes me feel better to know others have experienced this. It doesn't just happen in the morning like it did with my mustang, it happens any time I start the car after sitting a little while. I'm not blowing smoke so I wouldn't think it would be oil. I sure hope its not the valve seals, I don't really feel like checking them. I put brand new valve seals on and hope they're doing their job.
QUOTE:you say you had the car "tuned". What kind of tooning [sic] did you get? If it was just a dyno tune, it's not likely they tuned for part throttle. You could be running rich as hell under part throttle caking up your exhaust pipes, then, when you cold start the car, the condensation is carrying out the excess carbon build up.
I had my car tuned with HP tuners as I drove around and part throttle is tuned. The car seems to be running great. My exhaust pipes are caked with carbon, but I would expect a little more carbon with heads and cam, right?
QUOTE:you say you had the car "tuned". What kind of tooning [sic] did you get? If it was just a dyno tune, it's not likely they tuned for part throttle. You could be running rich as hell under part throttle caking up your exhaust pipes, then, when you cold start the car, the condensation is carrying out the excess carbon build up.
I had my car tuned with HP tuners as I drove around and part throttle is tuned. The car seems to be running great. My exhaust pipes are caked with carbon, but I would expect a little more carbon with heads and cam, right?
