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Location:
sydney
Registered:
March 2004
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s/c belt squeak. too tight or loose?
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Sun, 20 June 2004 12:34
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fridays, finally decided to change the s/c waterpump belt and aircon alt belt on friday at last, old one had major cracks and even few hole thru it
story is i tightened the belt up test drove it = ok. drove it all sat = ok.
comes sunday a belt noise at higher rpm. did a few test in 1st, 2nd, 3rd gear it starts to squeak from ~5500rpm onwards. stopped by, at idle gave it a rev and no noise, so it must be the s/c belt, since its the only thing which turns on with load. everytime i jab the accelerator during driving it duz a slight squeak aswell
neway duz it sound like s/c belt. if so is it too loose or is it too tight atm? its so hard to adjust this belt since the longest bit to feel is still to short and it feel same tightness as u tighten it up, which is damn tight
ne opinion? i like to tightened it up bit more to c but not sure if its overtightened atm and i might damage somethin as i tightened it more
also am i loosing boost if its squeakin like this?
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Location:
Brisbane
Registered:
June 2003
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Location:
Newcastle
Registered:
June 2002
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Re: s/c belt squeak. too tight or loose?
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Sun, 20 June 2004 16:06
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my gze used to squeel after 5500 rpm. Please tighten your belt. Remember they are meant to be damn tight. (thats what Ive read!)
Also try some belt dressing. I know its a bandaid solution but it helps.
My boost gauge would tell me I would lose 1-2 PSI when this squeeling starts. I would see it drop off after 5500 rpm.
I dont have probs anymore.
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I supported Toymods
Location:
Perth, WA
Registered:
May 2003
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Re: s/c belt squeak. too tight or loose?
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Sun, 20 June 2004 16:09
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you can buy stuff in a spray can called belt grip or something like that. spray that on, tension it up and your away
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Location:
Blue Mountains
Registered:
February 2004
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Re: s/c belt squeak. too tight or loose?
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Mon, 21 June 2004 03:47
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Mate, sounds like its too loose.
I had to change my belt heaps of times. It is too loose if it starts to squeal about 5500 - 6000rpm. This basically means you are losing boost. I was running about 12 pound and when the belt was squealing, i would peak at about 9 pound, and then drop to about 7 pound or so.
These belts are designed to be really tight. saying that though, if you tighten the belt to much you will here the stress on the supercharger / belt tensioner bearings.
What measured the tension by - looking down at the engine, then grab the s/c belt. try to wiggle it up and down, and see hou much movement you have got. Optimum tension is so you can move the belt about 2 or so mm from the resting postion up or down.
Its pretty important to get the tension right - just ask the old bearings that were in my belt tensioner. Its just a matter of fiddling.
Russ
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Location:
sydney
Registered:
March 2004
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Re: s/c belt squeak. too tight or loose?
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Mon, 21 June 2004 07:00
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yeah thanx people
i was pissed off hearing the squeak again this morning on the way to work, so i tightened up the bolt anotha 5 turns
test drove it squeak gone, heaps good now, was so anoying driving under 5500rpm all sunday.
nehow all is good, just hope i didnt tightened it too tight
i'll do that 2mm up and down test thingy next time i get into my car
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