Burning oil
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Cruiser
Joined: Jul 2012
Posts: 103
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From: Cape Cod
Burning oil
I had an oil change when I swapped out my handlebars. 200 miles later the engine was getting loud on a 15 mile ride to work. On the way home it was really making a racket. I had to add two quarts of oil and it quieted it down and sounded great. I thought maybe the shop didn't add the right amount of oil back in at the change. (No leaks into the AC or on the garage floor) The next day I rode 75 miles and burned a half quart...my buddies also said it was smoking white through the exhaust.
It currently sits in the shop with the engine being torn apart. No real updates yet besides they found the spark plugs are fouled.
so glad it is still under warrantee until the end of October. BTW, there is just over 6k on the clock.
It currently sits in the shop with the engine being torn apart. No real updates yet besides they found the spark plugs are fouled.
so glad it is still under warrantee until the end of October. BTW, there is just over 6k on the clock.
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
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From: Phoenix '53, '88, '09 Big Twins
white smoke indicates burning oil (black is too rich).
white smoke on acceleration is poor piston to cylinder seal - the piston rings are what makes the seal- the gaps could be in alignment so that gasses and oil can seep through, worn, broken or not properly seated ( ever seen the "break in your motor at 6000 rpm video?).
it could also be worn cylinder bore- on a wide piston ( 95/103) the piston can rock from side to side at the top and bottom of the stroke- this only gets worse- the cylinder bore ends up being hourglass shaped, so the seal is poor at the wide points.
smoke on decel is usually a bad valve seal.
the high intake vacuum on decel ( the motor is still pulling air, but the throttle is closed*) will pull in oil past a weak seal or gasket.
this can also show as oil leaking past the seal and past a held open intake valve when the motor is off and a puff of smoke on start up.
my '74 Blazer 350 does this about every 1 of 8 starts...so that tell me one seal is bad on an intake valve...
oil should be checked pre-ride- how did you ever get 2 qts low?...AND/OR are you now overfilled and pumping oil into the intake from the breathers?
mike
* the early OHV Knuck and Pan Riders Manual suggests snapping the throttle closed every few minutes at high speed to encourage top end oiling- the vacuum would help pull oil up to the valvetrain.
the pan covers have felt inside them to grab and drip oil down onto the valvetrain, and also to quiet noise
white smoke on acceleration is poor piston to cylinder seal - the piston rings are what makes the seal- the gaps could be in alignment so that gasses and oil can seep through, worn, broken or not properly seated ( ever seen the "break in your motor at 6000 rpm video?).
it could also be worn cylinder bore- on a wide piston ( 95/103) the piston can rock from side to side at the top and bottom of the stroke- this only gets worse- the cylinder bore ends up being hourglass shaped, so the seal is poor at the wide points.
smoke on decel is usually a bad valve seal.
the high intake vacuum on decel ( the motor is still pulling air, but the throttle is closed*) will pull in oil past a weak seal or gasket.
this can also show as oil leaking past the seal and past a held open intake valve when the motor is off and a puff of smoke on start up.
my '74 Blazer 350 does this about every 1 of 8 starts...so that tell me one seal is bad on an intake valve...
oil should be checked pre-ride- how did you ever get 2 qts low?...AND/OR are you now overfilled and pumping oil into the intake from the breathers?
mike
* the early OHV Knuck and Pan Riders Manual suggests snapping the throttle closed every few minutes at high speed to encourage top end oiling- the vacuum would help pull oil up to the valvetrain.
the pan covers have felt inside them to grab and drip oil down onto the valvetrain, and also to quiet noise
Road Captain
Joined: Sep 2013
Posts: 612
Likes: 4
From: Iowa
200 miles and 2qts low, hard to imagine that it burnt it, maybe they didn't put enough oil in to begin with. Since you had no prior issues it's very suspicious. Beings it was ran low for a period of time and lack of lubrication could have scored the cylinder walls.
Seasoned HDF Member
Joined: Jan 2013
Posts: 10,637
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From: Lake, Ms
2010 Limited with some stuff
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Cruiser
Joined: Jul 2012
Posts: 103
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From: Cape Cod
Good points... Thanks for the input. I haven't checked the oil after each ride. I try to do it when filling up. I didn't check it when I picked the bike up after the oil change and my first thought was that they didn't fill it up all the way. All lessons learned at this point. I am hoping to hear from the dealer tomorrow. Just looking to get it fixed and under warrantee at this point.
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