First off, thanks to the mebers who helped me in my last question, I got my issues resolved due to your replys, thanks again. For my new question, My cb has 297,XXX on it and runs great,however- I was riding my bike behind my car while my girl was driving it and noticed smoke from the tailpipe, but it was only a small puff durring takeoffs from stopsigns or lights, and then was nonexistant between shifts and at all for that mater, only at takeoff from a full stop, and not even every time, but often. It seems to run fine nevertheless though. Is my f22 going to die soon, or will it be ok for another 6 months to a year? Any idea's?
-
make sure its got enough oil in it
Freedom Is Not Free
U.S Army 02/08 Medically DischargedComment
-
Judging from your description of when it does and doesn't appear to smoke, my idea is worn valve stems / guides (though it could be rings). It might just be worn stem seals, but if the seals are worn then there's a good chance the stems and guides are as well. You could try fitting new seals, but they may or may not last long if the stems move sideways in operation due to wear (it wouldn't be much sideways movement, but causes more wear on the seals).
Even just fitting new seals would be a fair bit of work, I wouldn't try to fix the problem unless it became significantly worse than it sounds to be now. Ignore it until you can't.Regards from Oz,
John.Comment
-
Might just be steam, Because there may be water sitting in the pipes and when the car jerks forward the water moves back to a hotter piece of pipe turning it into steam
wat?Comment
-
Steam is very common, especially if you're doing your tests when the car is still cold.
Blue smoke would indicate oil, and johnl's diagnosis is spot-on there. That's really the only thing that would cause a puff of oil smoke at acceleration. Bad rings would result in constant smoking (I had the joy of driving a smoke-trail-leaving car for 8 hours last summer...
)
Black smoke indicates a significantly rich fuel mixture. That means you aren't burning fuel properly. Modified cars tend to do this, I've noticed. Slap on an intake and an exhaust, and the next thing you know, you're blackening your bumper with exhaust soot. The puff of black smoke most often comes when under hard or moderate acceleration.
White smoke would be coolant, but can often be confused with steam. If it's coolant, it'll smell sweet. You'll know. It doesn't sound like coolant is your issue, though.
Get back to us with a color, and we'll be able to offer a little more focused advice
Comment
-
the smoke looks whiteish, but how dose coolant puff on startup? its def looking like a puff of smoke though, not steam......I'll have her drive it again, and get back w/ yaComment
-
mine does this when i first start it ,it'll last about 15 minutes till it heats up then goes away,i'm saying its steam
spoonsportsaddictComment
-
Coolant shouldn't puff at startup. The only thing that can really cause coolant to burn would be a blown head gasket... It's not usually a small or occasional puff.
If it's whitish, it might really be blue... oil... If that's the case, johnl is probably right.
Comment
-
If the cooling system is pressurised (especially hyper pressurised by say a blown head gasket), then once the engine is shut down some coolant may leak into the combustion chamber, so when you start it up after having been shut down for a while that coolant gets vapourised into steam by the hot exhaust gasses.Originally posted by deevergote
How much steam may be formed is largely down to how blown the head gasket may be. If it's only just starting to go then there may only be a seepage into the combustion chamber, so in normal use not enough coolant is escaping into the chamber to form noticable steam, but may after the engine is started up after having been shut off for a while...?
At any rate, Richie's problem seems to occur after a period of idling, not at start up(?), and he reckons it's smoke not steam (?).Regards from Oz,
John.Comment
-
Steam could be from condensation in cold weather as well... but that would only continue for a short time. 5 minutes of idling should evaporate any condensation in the exhaust system.
I would think a coolant leak would be constant, or just at startup due to seepage as everything cools down.
The puff at acceleration is most likely a valve-related issue, or a fuel-related issue. Fuel would be a much easier fix... but if the smoke is light in color, it may be oil burning
Comment
Comment