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Discussion Starter · #1 ·
I purchased a GL1500 last year and I am just now getting around to get it running. It runs fine after a carburator rebuild. Sounds good runs strong. After I let it run for 15 minutes or so. It starts pumping oil out of the larger clear tube on the left side of thengine by the alternator. I noticed it was uncapped, most that I have seen are capped. Any way I took off carburators again to trace the clear tube, checked it out to see that all was attached as it should be. It seemed to be fine. Re assembled, again runs great took it down the road 10 minutes or so, again pumping out oil again. Any thoughts?:sadguy:
 

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Still Learning
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Yes both tubes there are to have caps on the ends. One tube comes from the air cleaner which the oil could be coming from crankcase from plugged PCV valve.is there oil in the air box?
How much oil are you talking about? Measure it in 5 minutes.
 

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Discussion Starter · #3 ·
Oil problems

Thanks for quick response Stu. If I try to measure oil volume loss it would take less than a 2 minutes to drain all of the oil from the engine. So probably 2 to 3 gal a minute. I had to refill a couple of times. The top filter box seems to be clear of oil not dry but normal. The plugged PVC valve seems to be a good place to look, will get into that.
Not sure where PVC valve is
 

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The Ken Bergen post in your clutch problem thread suggested a clogged oil pump. I don't know much about those problems but it could be possible your 2 problems are related.
 

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It aint rocket science
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The tube needs a plug and cap, it comes from the breather storage tank. The other line from tank vents blow-by gases back into air box, check that line for restrictions. With no cap you are venting oil laden gases straight to atmosphere at a lower height than air box.

Check that you are not overfilling crankcase with oil. Severe blow-by with broken engine compression components (pistons, valves and rings) could compound the problem. Black engine breather tube goes to storage tank with no PCV valve.

With hose capped and air filter removed watch for oil in air box. If the oil is coming up that high you got other problems.:coollep:
 

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Could be related to a scavange pump issue ...

...as odd as it sounds, you could take a look into th alternator's mounting as immediately after running as you can... there shuold be "splash" levels of lubrication but no real "oil level".

I always suspect clogging and restrictions in the 1500 lubrication systems if the bike has been not run for a while (like 6-months)... If you're certain that the case is not overfilled, it is possible that you've got some blockage in a drain path or a weak/failed scavenging pump.

What's your oil pressure like (not always indicative since this is a supply value only)? (18psi/11psi are normal for cold/hot respectively)
 

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It aint rocket science
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Could be related to a scavange pump issue ...

...as odd as it sounds, you could take a look into th alternator's mounting as immediately after running as you can... there shuold be "splash" levels of lubrication but no real "oil level".

I always suspect clogging and restrictions in the 1500 lubrication systems if the bike has been not run for a while (like 6-months)... If you're certain that the case is not overfilled, it is possible that you've got some blockage in a drain path or a weak/failed scavenging pump
From the diagram it looks like scavenge pump pick-up is between clutch cover and rear cover. It is then pumped to spray lubricate components between rear cover and crankcase.

Would it not be better to check for failed pump at slave cylinder and pushrod. If there was a failed oil scavenge pump it would fill clutch area and pour out when slave removed.
 

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Discussion Starter · #8 ·
Oil pumping out problem.

Just thought I would let everyone know what has happened on the oil problem.. A Honda mechanic says it would not be a problem to fix so i sold the bike to him. Problem solved. I also informed him of the not being able to get of gear after the motorcycle has been driven for a while.

Thanks for the input from all of you.:)
 
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