Blue smoke at startup
#11
05-25-2008, 09:39 AM
RE: Blue smoke at startup
ORIGINAL: rbabos
Generally this is caused from oil leaking down the intake guide. Guide loose or valve seal shot. Choking will reduce air coming in from normal source and engine vacume will try to pick up some oil and air from the intake guide. Simple test for valve seals is to rev the engine up and crack throttle closed. If it smokes within a few seconds of this it's the intake valve seals. If it smokes on a heavy decel, same ****. Exhaust guides generally create no problem, and back pressure in the system has the opposite effect and oil is not sucked out of the guide. A small amount may trickle down when engine is shut off, but it is really small amount. Plugs will show black crusty deposites if intake guide and seal are shot, eventually.
Ron
Generally this is caused from oil leaking down the intake guide. Guide loose or valve seal shot. Choking will reduce air coming in from normal source and engine vacume will try to pick up some oil and air from the intake guide. Simple test for valve seals is to rev the engine up and crack throttle closed. If it smokes within a few seconds of this it's the intake valve seals. If it smokes on a heavy decel, same ****. Exhaust guides generally create no problem, and back pressure in the system has the opposite effect and oil is not sucked out of the guide. A small amount may trickle down when engine is shut off, but it is really small amount. Plugs will show black crusty deposites if intake guide and seal are shot, eventually.
Ron
#12
06-03-2008, 10:49 AM
RE: Blue smoke at startup
Ok guys the verdict is in . Apparently I must have overfilled it because now there is absolutely no smoke at startup at all . I have been watching the dipstick and it is between the marks and looks good whether hot or cold . Thanks for all your input . I did not think I could have a top end problem at 20 k especially since oil has been changed every 3 k and all maintenance performed by previous owner .
#13
06-03-2008, 01:15 PM
RE: Blue smoke at startup
ORIGINAL: Curly61
I just installed a brand new big sucker kit on it about three weeks ago . So I know its fine . I am thinking it may be overfilled because I was not sure when I put the oil in I used 3 1/2 quarts because i checked it cold . I have heard some say just use three quarts only . I will ride it over the weekend and see what it does . Thanks
I just installed a brand new big sucker kit on it about three weeks ago . So I know its fine . I am thinking it may be overfilled because I was not sure when I put the oil in I used 3 1/2 quarts because i checked it cold . I have heard some say just use three quarts only . I will ride it over the weekend and see what it does . Thanks
#14
06-03-2008, 08:16 PM
RE: Blue smoke at startup
1999-2000 Twin Cam had the cam bolt recall. Make sure this has been performed! I have spoken to several people that bought early Twin Cam low mileage bikes that had no idea of a recall.
Also, consider having the cam chain tensioners inspected.....this is a known issue and is extremely common.
Also, consider having the cam chain tensioners inspected.....this is a known issue and is extremely common.
#15
06-16-2008, 06:18 PM
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RE: Blue smoke at startup
i might be wrong nut i thought blowing blue smoke was a valve problem ??
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