Belt Squeal

[Cumby]

I had a new belt put on my 99 SN GT40 couple of months ago. Only had it out maybe 4-5 times so far. I'm getting a squealing noise at cold starts for 5-10 seconds or so and when revving the engine fast. I'm assuming it's the belt. Should I just try tightening it a little to see if this resolves it? Where do I tighten it and how do I make sure I don't over tighten?

[a0128]

Get new belts http://www.nautiqueparts.com/beltsetfordengines.aspx

Download engine manual http://www.planetnautique.com/Correc...T-40Manual.pdf

Belts should be tightened so that there is 1/4" of deflection.

[kend]

I'm assuming it's the belt. Should I just try tightening it a little to see if this resolves it? Where do I tighten it and how do I make sure I don't over tighten?

I think it's the alternator bracket that pivots to tighten on that boat (top of port side -loosen two bolts.. pivot bolt and bolt on slide bracket 9/16" if I remember. Pull alternator to tighten belt and re-tighten bolt on slide while pulling alt tight). Probably a new belt getting broken in and got a little loose. Hopefully it's just the belt and not a metalic squeaking noise that happens when a pulley bearing is going out because of over tightened belt

[Cumby]

I think it's the alternator bracket that pivots to tighten on that boat (top of port side -loosen two bolts.. pivot bolt and bolt on slide bracket 9/16" if I remember. Pull alternator to tighten belt and re-tighten bolt on slide while pulling alt tight). Probably a new belt getting broken in and got a little loose. Hopefully it's just the belt and not a metalic squeaking noise that happens when a pulley bearing is going out because of over tightened belt

Sounds easy enough.

Isn't there a way to check the proper tension on the belt by pushing on it to see how much it gives? Not sure how to keep from over tightening?

Thanks

[Cumby]

Sounds easy enough.

Isn't there a way to check the proper tension on the belt by pushing on it to see how much it gives? Not sure how to keep from over tightening?

Thanks

Just found it. Press half way between the alt and water pump pulleys and you should get 1/4 " play in the belt.

[kend]

1/4 " play in the belt.

That's not much, I assume a0128 means 1/4" in each direction. Auto parts stores sell a spray can "belt dressing" -a sticky substance that is supposed to stop belts from squeaking by giving them more traction against the pulley surface.

[Cumby]

Yeah, I thought about trying some of that. May pick up some of it to try among with tightening a little too.


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[Cumby]

Checked the belt and it was very loose. Could spin the alternator easily. Got it a tight as I felt comfortable using a wrench as lever, but I can depress it more than a 1/4 ". Seems tight and like it should be enough. I would hate to over tighten it.


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[theskunk]

How big was the wrench? Generally speaking, you're not going to get it too tight without a rather large crow-bar, and when they say 1/4 inch in either direction, they really mean between there and a half inch. If it still squeaks at you, tighten it more.

With that engine, you do *not* want it too lose, as over time the alternator, which has a bracket that is designed to handle that tension, *can* actually come out of line with the rest of your pulleys and you'll start going through belts very fast.

[Cumby]

About 12 ". I'm pretty sure it's between 1/4 and 1/2. So if no more squealing can I assume it's tight enough?

Is there an adjustment on the other belt. It has more give to it when I push on it, but don't know if that's normal?


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