oops, overfilled oil - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 6 (permalink) Old 08-25-2006, 09:41 AM Thread Starter
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oops, overfilled oil

Did oil change a while back, manual said 4 litres but as I was putting in the fourth i noticed that it was over the top of site glass around 3 and half or so, bike was on center stand while doing this by the way. I replaced the oil filter at the same time so I figured it would come down a little but it hasn't. Could I be doing any damage to anything by having to much oil in there?
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post #2 of 6 (permalink) Old 08-25-2006, 09:45 AM
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4 Litres is about 3 1/2 quarts, when you check it you do let it run and then shut it off, put it on the center stand and wait about 5 minuts then check. If there is a air bubble still able to be seen in the glass you are ok. There is no real damage you can do unless you way overfill by a couple of quarts, they you can run the risk of hydrolocking, it would also be smoking alot. Hope this helps

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post #3 of 6 (permalink) Old 08-25-2006, 11:08 AM
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Actually 4 liters = 4.2 liquid quarts, but no one has been able to get all that oil that the mfg calls for, in there. I would suggest that you open the side drain with the bike on the centerstand and drain out what ever it takes to get the level right. It's not a big deal to do and I wouldn't want to run the engine over full on oil.

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post #4 of 6 (permalink) Old 08-25-2006, 11:40 AM
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dont use the side drain cover, that is how i cut the gasket there, it pushed it to the edge, and i didnt see it when i tightened her back up and *cut* it went. use the bottom drain plug. there will just be a lil excessive sloshing from the crank dipping into the oil, and may make extra noise. Nothing to be that worried on.

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post #5 of 6 (permalink) Old 08-25-2006, 06:57 PM
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I was told way back by a GMC engineer that extra oil in the crankcase will get frothy from the air mixed in - caused by the piston rods "slapping" or "whipping" the oil. They also suggested running a half a quart low to decrease the slapping and increase the horsepower. Both engines that I ran 1/2 a quart low on developed problems, so I'm not sure what to believe. In any case, I'm not draining it out. Haven't had any trouble with noise.

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post #6 of 6 (permalink) Old 08-25-2006, 08:31 PM
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I used the side plug when I overfilled mine and had no problems. I think the bike gremlins decide to cause different problmes for us to keep us guessing and contradicting each other.

Jim W
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