GL1200 Smoking


Information and questions on GL1200 Goldwings (1984-1987)
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Turkeyboy111
Posts: 30
Joined: Tue Mar 31, 2020 1:48 pm
Location: San Diego, California
Motorcycle: 1978 GL1000

GL1200 Smoking

Post by Turkeyboy111 »



My 1985 GL1200 starts puking blue smoke after about a minute of idling. It is also leaking oil from the timing cover (which I know isn't good). I checked to make sure the crankcase ventilation port wasn't blocked and removed the filter just to make sure. I also rechecked the torque on the headbolts at 41ft/lbs. When I took the heads off, there was some pitting on two cylinders but my local machine shop said it should be fine, so I doubt blow-by is the main issue. The engine is of unknown mileage but from the looks of the insides it seemed like it wasn't very high. I also have a different intake on it; don't think that's the cause but figured I'd let you guys know. I'm thinking I installed the head gaskets incorrectly. Either that or maybe the valve stem seals are going bad. They didn't look bad when I took apart the heads but who knows. I plan on taking off the timing cover next to try to find the leaking oil source, then possibly doing a compression test just to be safe. Any other ideas?



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Rednaxs60
Posts: 2295
Joined: Wed Nov 18, 2015 12:44 pm
Location: Victoria, British Columbia, Canada
Motorcycle: 1985 GL1200 LTD
1995 GL1500 SE CDN Edition
2012 Suzuki DL1000 VStrom
2008 GL1800 (sold)
Ontario 1985 GL1200 LTD (sold)

Re: GL1200 Smoking

Post by Rednaxs60 »

Generally these engines will spew blue smoke out the exhaust on start, then clear up. You mention the blue (oil) smoke starts after start and has been idling for a few minutes.

Oil dripping from the timing covers can be from the crank oil seal, or from the head camshaft arm oil seals, most probable the crank oil seal.

To check for blowby you need to do a compression and leak down test. If the compression is good, rings and such should be as well; however, a leak down test will confirm your findings. If the leak down test fails it will probably be the exhaust valves - these take the brunt of years of poor quality fuel and lack of fuel filter changes, but If the rings are getting weak and not sealing because the cylinders have developed a "glaze" that reduces the sealing effect of the rings - you will hear air escaping into the crankcase.

I am rebuilding my '85 Limited Edition engine for a variety of reasons - 165,000 Kms and 36 years everything gets a little loose, one being a good bit of blowby. The engine cylinders are in good shape and required a hone of the cylinders - no ridge at the top of the cylinders so no requirement to ream this area. Three of the four con rod bearings looked very good, the #1 con rod bearing was quite work. Had the machine shop check the connecting rods for any bending - con rods were good. Rings are not an issue, most machine shops can assist in getting a suitable replacement. The wild card if you open up the engine are the crank and journal bearings. Not plentiful and takes time to source. I have to replace two bearings because these were seized. Always had a squealing sound if the bike was not used for a while. These bearings are on the end of the alternator shaft and final shaft. Don't have the tool(s) necessary to remove because of the location so my local machine shop has the honour. Had the same machine shop do the heads January 2019 I believe.

When I worked at my Father's garage years ago we had a saying for engine repair in that if you are going to do the top end - heads and such - you should do the bottom end. This way the engine will age and wear equally going forward.

Long winded response. Compression and leak down test first, remove timing belt covers to locate oil leak, then decide the way ahead.
"When you write the story of your life, don't let anyone else hold the pen"

Ernest

Turkeyboy111
Posts: 30
Joined: Tue Mar 31, 2020 1:48 pm
Location: San Diego, California
Motorcycle: 1978 GL1000

Re: GL1200 Smoking

Post by Turkeyboy111 »

Thanks for taking the time to write such a comprehensive response. I have since removed the timing cover and discovered that that cam oil seal was installed improperly and had become dislodged, so I tapped that back into place. Going to go borrow a compression tester right now from AutoZone. However, the pistons and cylinders walls looked great for the most part when I opened her up, so I'm not anticipating that being the problem. An admin over at Goldwing Facts seemed to think that perhaps the piston rings gaps had lined up while the engine was sitting for a while. Do you think this could be the case?

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dingdong
Posts: 3907
Joined: Thu Apr 08, 2010 8:35 am
Location: Oklahoma City
Motorcycle: 1976 gl1000
1993 gl1500A
2004 NRX1800 Rune SOLD

Re: GL1200 Smoking

Post by dingdong »

The admin you are referring to didn't say anything about end gap. You misunderstood. Someone else mentioned end gap. Garbage. The admin. said stuck rings. Rings that are frozen in the pistons from standing for a while. Therefore applying no pressure to the cylinder walls. Thereby allowing oil to bypass the rings. Thereby smoke. He recommended to you to ride the bike for a few hundred miles to allow the rings to free up. I agree. Good luck.

Turkeyboy111
Posts: 30
Joined: Tue Mar 31, 2020 1:48 pm
Location: San Diego, California
Motorcycle: 1978 GL1000

Re: GL1200 Smoking

Post by Turkeyboy111 »

I totally misunderstood what he meant by stuck rings, thanks for clearing that up, I'll follow the advice!

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dingdong
Posts: 3907
Joined: Thu Apr 08, 2010 8:35 am
Location: Oklahoma City
Motorcycle: 1976 gl1000
1993 gl1500A
2004 NRX1800 Rune SOLD

Re: GL1200 Smoking

Post by dingdong »

Again. Good luck. Keep us posted.

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AZgl1800
Posts: 2339
Joined: Thu Oct 30, 2008 2:46 pm
Location: Lake Oologah Indian Territory USA
Motorcycle: '02 GL1800
2009 Piaggio MP3 250cc

Re: GL1200 Smoking

Post by AZgl1800 »

it would be a lot more useful to stick with one forum,
most of the responders are on both forums and it is ridiculous to be cross posting from one forum to the next.

makes it damn near impossible to figure who said what.
~John

'02 GL1800
2009 Piaggio MP3 250cc

Turkeyboy111
Posts: 30
Joined: Tue Mar 31, 2020 1:48 pm
Location: San Diego, California
Motorcycle: 1978 GL1000

Re: GL1200 Smoking

Post by Turkeyboy111 »

AZgl1800 wrote:
Thu Jul 30, 2020 4:49 pm
it would be a lot more useful to stick with one forum,
most of the responders are on both forums and it is ridiculous to be cross posting from one forum to the next.

makes it damn near impossible to figure who said what.
Noted.

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DenverWinger
Posts: 1483
Joined: Thu Jun 23, 2011 2:20 pm
Location: Denver, CO
Motorcycle: (s)
1980 GL1100 STD Vetter (2005-)
1993 GL1500 Aspencade (2017-)
1983 Trav-Lite Camper (2010-)
Past rides
1972 CL350 (1980-1988) sold
1978 Suzuki GS550 (1985-2005) sold
1977 GL1000 (2002-2006) sold

Re: GL1200 Smoking

Post by DenverWinger »

I post fairly frequently both here and there, but I avoid putting the same post on both because as John stated, it's usually the same eyes that see it on both forums.

BTW - +1 on the post from the other forum where somebody said you may have an accumulation of gunk in the exhaust, and it doesn't start burning out of the pipes until they get hot. Also, didn't you say on the other forum you found a camshaft seal that wasn't seated properly? That should fix your timing cover oil leak....

So drive it a hundred miles or so (like you stole it :lol: ) and see if that doesn't fix a bunch of problems.

These 'Wings HATE sitting unused for long periods and simply running them often "fixes" many problems.... :) :)
♫ 99 Little Bugs in the Code, ♪
♪ 99 Bugs in the Code. ♫ :(
♫ Take one down, Patch it around, ♪
♫ 127 Little Bugs in the Code. ♫ ♪ :shock:

~Mark

Turkeyboy111
Posts: 30
Joined: Tue Mar 31, 2020 1:48 pm
Location: San Diego, California
Motorcycle: 1978 GL1000

Re: GL1200 Smoking

Post by Turkeyboy111 »

I'll finish her up and get her roadworthy asap then!

ottsum
Posts: 2
Joined: Sat Sep 10, 2011 9:32 pm
Location: Canada
Motorcycle: 1987 gl1200a

Re: GL1200 Smoking

Post by ottsum »

I noticed mine smokes less when I keep it on the center stand overnight vs. the side stand. wondering if sitting on an angle causes oil to pool somewhere??



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