oil in sight glass not moving, light stays on - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 4 (permalink) Old 03-07-2017, 01:34 AM Thread Starter
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oil in sight glass not moving, light stays on

ok so i just replaced my impeller mechanical seal bolted everything back up and i just started it up, recorded it running for about 20 seconds and when watching it i noticed the oil light stayed on, i just ran back out there and started it up for about 5 seconds and noticed that the oil in the sight glass didn't move... I know that its supposed to suck the oil up and no oil should be seen in the sight glass when the bike is running..... there shouldn't be any issues with the oil pump i wouldn't think since i didn't absolutely nothing to it, it worked fine last time i started the bike up... i read a few threads about the oil light staying on after changing the oil and people recommended loosening the filter and tightening it back up to release any air pockets while the bike is running, but if oil isn't moving through the engine im kind of afraid to start the bike again......
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post #2 of 4 (permalink) Old 03-07-2017, 10:21 AM
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Given that you just serviced the oil pump, it's probably completely out of prime and struggling to pump against the restriction of the oil filter. I would spin the filter off a few millimeters and wait for it to puke oil like you said, you'll know whether the pump is going to prime and start pumping oil in just a few seconds. I've done this before when I was having oil frothing issues/filter clogging/low oil pressure which would leave my sight glass just like yours seems to be.
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post #3 of 4 (permalink) Old 03-09-2017, 05:37 AM Thread Starter
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air pocket was the problem, unscrewed the oil filter, oil came out, screwed it back on and oil pressure came back. Now i just have to hope that the coolant in my oil is from when i took the side case off and a bit got into the crank case and that its not the impeller seal or gasket around the impeller leaking.... these oil changes are going to get expensive fast since i probably need to do atleast 3 to see if the oil clears up any..... 3 quarts of oil and a filter per change, damn near $60 at a minimum.... why do i have such ****ty luck with this bike? hahaha, no change of coolant level in the overflow or the radiator so im guessing its just coolant getting into the case when i took the side cover off since i couldn't get 100% of it soaked up.
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post #4 of 4 (permalink) Old 03-09-2017, 11:45 AM
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It could be the air entrainment that happens in the first minutes after startup. Depends how much coolant went in there I guess.

If it's not clear after a ride, it's probably coolant.

If you could update your other thread about the noise, it would help people that find your video in the future.

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