engine smoking at start up


Information and questions on GL1100 Goldwings (1980-1983)
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roadwanderer2
Posts: 4111
Joined: Thu Aug 08, 2013 4:03 am
Location: sweetwater, Tennessee
Motorcycle: 83 GL1100A aspencade, previously owned, 1981 honda GL500i silverwing interstate, 1974 yamaha xs400, 1974 Honda cb450 twin cam, 1983 honda vt30, 1982 honda 700 shadow, 1972 cb750four, and my first bike, a brand new 1982 honda CM400e. and a new to me 1986 GL1200 aspencade SEi
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engine smoking at start up

Postby roadwanderer2 » Sun Apr 06, 2014 5:35 am



OK ppl's here's a new topic for ya's.

when i start my bike up,(mostly for the first time of the day when the engine is cold), im getting oil smoke out of the mufflers, (valve seals?), for a couple of minutes. when it stops coming out of the right side, it seems to continue from the left muffler for a longer period of time then goes away, and sometimes when i stop the bike for a few minutes to go inside a store or something, then restart it again after its already warmed up, it blows a little puff of oil smoke then goes away. its not antifreeze vapor, i know what that's like.

i also need to figure out why am i getting a mix of oil and fuel in that little storage bottle that's down under the motor on the left hand side, you know, that little bottle that you have to empty every so often. i left it off for a few days and if i get on it hard,(hard throttle going up thru the gears), the mix comes out of the tube and gets all over the left exhaust pipe and smokes up pretty bad from the hot pipe, so i put the container back on. im starting to think that since this motor has just about 100,000 miles on it, its almost engine rebuild time, or do i have a more serious problem going on and should i have it checked to see what it could be.

anyone have any ideas?

stuart, a.k.a. roadwanderer2.



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Fatwing Chris
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Motorcycle: 2004 ABS Model Goldwing

Re: engine smoking at start up

Postby Fatwing Chris » Sun Apr 06, 2014 8:25 am

If you park the bike on the sidestand then some smoke on start-up is fairly normal because of the flat engine design, although the other issue sounds like you have excessive blow-by(worn or broken rings).
Any chance you could do a compression test and/or a cylinder leak down test?These motors usually aren't anywhere's near worn out at 100 k.They were built to go 300 k before needing any major work.

PS There is a crankcase ventilation hose(3/8" inside dia approx)that runs from the top/back of the motor and up to the breather housing.You might want to make sure it's not plugged.If it is the crankcase will build pressure and push oil or oil vapour out of the motor where ever it can.Got any oil leaks?
If I'da known it would last this long,I'da taken better care of it.
Chris
Double Dark
Darkside # 1602

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roadwanderer2
Posts: 4111
Joined: Thu Aug 08, 2013 4:03 am
Location: sweetwater, Tennessee
Motorcycle: 83 GL1100A aspencade, previously owned, 1981 honda GL500i silverwing interstate, 1974 yamaha xs400, 1974 Honda cb450 twin cam, 1983 honda vt30, 1982 honda 700 shadow, 1972 cb750four, and my first bike, a brand new 1982 honda CM400e. and a new to me 1986 GL1200 aspencade SEi
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Re: engine smoking at start up

Postby roadwanderer2 » Sun Apr 06, 2014 9:27 am

good morning fatwing:

i didn't know that was a common thing to happen, but it doesn't do it all the time, only sometimes. maybe i can put the bike on the center stand when im finished riding it for the day, then start it up the next morning and see if that makes any difference. i don't have the equipment to do a compression test, but i do have access to it.

I'll take the air filter off and check to see if that tube is in fact clogged up. i did change the air filter about 3,000 miles ago, maybe it time to change it again?. this motor is tight, no oil leaks that i can see, or drippings onto my garage floor, but i did notice some antifreeze drippings on the ground under the motor when i stop from a long ride every once in a while. I've checked all the hoses and clamps, and they seem to be in good shape, nothing broken or loose. im hoping its not a sign that the water is starting to seep from the pump weep hole, but if that were the case, it would be leaking all the time wouldn't it?

stuart.

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roadwanderer2
Posts: 4111
Joined: Thu Aug 08, 2013 4:03 am
Location: sweetwater, Tennessee
Motorcycle: 83 GL1100A aspencade, previously owned, 1981 honda GL500i silverwing interstate, 1974 yamaha xs400, 1974 Honda cb450 twin cam, 1983 honda vt30, 1982 honda 700 shadow, 1972 cb750four, and my first bike, a brand new 1982 honda CM400e. and a new to me 1986 GL1200 aspencade SEi
Contact:

Re: engine smoking at start up

Postby roadwanderer2 » Sun Apr 06, 2014 10:23 am

OK fatwing, here's what i found.....

i took off the air filter and found that rubber gasket that sits under the filter was half off and half on where it was suppose to be sitting, i checked that 3/8 hose you mentioned and it was unclogged, also checked the drain storage bottle again and it was empty. i put the bike on its center stand, let it sit for a little bit then started it up. not much smoke came out, just a few little puffs from both mufflers. i did however find that the screen that's inside the plenum, i guess that's the anti-flashback screen, is very dirty and when i ran my fingers across it, they came out with some oil and some fuel smell on my fingers. not sure if that's a problem or if its normal.

right now, im taking the bike out for a ride, and I'll be back in a few hours.

stuart, a.k.a. roadwanderer2.

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roadwanderer2
Posts: 4111
Joined: Thu Aug 08, 2013 4:03 am
Location: sweetwater, Tennessee
Motorcycle: 83 GL1100A aspencade, previously owned, 1981 honda GL500i silverwing interstate, 1974 yamaha xs400, 1974 Honda cb450 twin cam, 1983 honda vt30, 1982 honda 700 shadow, 1972 cb750four, and my first bike, a brand new 1982 honda CM400e. and a new to me 1986 GL1200 aspencade SEi
Contact:

Re: engine smoking at start up

Postby roadwanderer2 » Mon Apr 07, 2014 7:19 am

fatwing, you were right about the way these flat motors start up when their cold and on their sidestands. i put the bike on the center stand last night and just came back in from my garage after starting it up, and not one puff of oil smoke came out of the pipes. i guess im gonna have to put the bike on the center stand every time i stop riding it for the day so it doesn't happen anymore.

thanks for your input about it, i really appreciate it. another problem solved.

stuart.




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