Engine Squeak - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 15 (permalink) Old 02-22-2017, 09:44 PM Thread Starter
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Engine Squeak

UPDATE: The noise was caused by the impeller mechanical seal, order a new one along with the Oring that sits on the shaft behind the impeller, replaced both of the old ones with the new and the noise is now gone. Thanks to everyone who suggested the impeller seal!

To make a long story short, I haven't been on my bike in almost 2 years, I was told that it was making a squeak/chirp from the right side, thought it was the clutch, so the other day I tore it apart and found nothing wrong, got everything back together today and just fired her up, when it was cold no noise, but once she warmed up there was indeep a squeaking noise from the right side, I have no idea what it is, pulled in the clutch, no difference in the noise, as the engine got warmer the sound got louder and almost non-stop.

Recorded it, heres the YT link:

Last edited by Daniel Krueger; 03-09-2017 at 07:06 PM.
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post #2 of 15 (permalink) Old 02-22-2017, 11:23 PM
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Private video so couldn't listen. I'm going to guess water pump bearing.

Any change with rpm?

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post #3 of 15 (permalink) Old 02-22-2017, 11:34 PM Thread Starter
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Private video so couldn't listen. I'm going to guess water pump bearing.

Any change with rpm?
changed the view settings to public, should be able to see it now. I didn't notice any change in the RPM....
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post #4 of 15 (permalink) Old 02-23-2017, 02:47 PM Thread Starter
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Private video so couldn't listen. I'm going to guess water pump bearing.

Any change with rpm?
Correct me if I'm wrong here, I called a shop and told me what you said, that it might be the water pump bearings and he told me that he thinks only the side cover needs to be removed to replace them but I'm thinking the case has to be split to fix them, am I correct or is he? I had the side cover off and I'm no mechanic but I didn't see any way to remove the water pump and get to the bearings without splitting the case.
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post #5 of 15 (permalink) Old 02-23-2017, 07:04 PM
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I had a squeak similar to yours. Mine was more of a chirp, but the video you posted sounds close. Turned out to be a loose spark plug. The squeak/chirp was the compression slipping by the threads. I pulled the spark plugs, reinstalled, and torqued them down (by hand). Squeak/chirp gone and never returned.

Not sure if this is your problem too, but simple enough to check before ripping apart the engine.


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post #6 of 15 (permalink) Old 02-24-2017, 07:58 AM
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Had the same on one of my bikes...was a spark plug too...(threads were stripped, fixed with a heliocoil )

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post #7 of 15 (permalink) Old 02-24-2017, 12:45 PM Thread Starter
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Quote:
Originally Posted by cglennon View Post
I had a squeak similar to yours. Mine was more of a chirp, but the video you posted sounds close. Turned out to be a loose spark plug. The squeak/chirp was the compression slipping by the threads. I pulled the spark plugs, reinstalled, and torqued them down (by hand). Squeak/chirp gone and never returned.

Not sure if this is your problem too, but simple enough to check before ripping apart the engine.
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Had the same on one of my bikes...was a spark plug too...(threads were stripped, fixed with a heliocoil )

If it is the plugs, will I be able to feel the compression going past them if I put my hand up to it or something? Also the noise just started out of nowhere, plugs were changed about a year or so before this happened so I'm not to sure on that being the issue. I'll retourque them down and see if that fixes later today.
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post #8 of 15 (permalink) Old 02-24-2017, 01:10 PM
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Noise could be a leak in the head gasket too...although you'd see evidence of this.
Could be an exaust leak, or a reed valve leak too. Hard to tell from the video without actually being there...

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post #9 of 15 (permalink) Old 02-24-2017, 01:23 PM
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With a head gasket leaking like that, it would only be running on one cylinder.

Haven't known exhaust leaks to squeak.

Seems like either of those should change more with rpm.

There's a bearing in the starter clutch too, front of the engine. Might need a stethoscope. Water pump is to the rear.

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post #10 of 15 (permalink) Old 02-24-2017, 06:15 PM Thread Starter
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I'm thinking it's probably the water pump bearings. Now to replace these does the impeller come off from the shafts and the bearings are there or do I need to split the case in order to remove the impeller shaft? I'm not sure where these bearings are at and I didn't see them on any of the diagrams on bike bandit....
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