Club G40 Forum
Technical => Superchargers / G-Lader => Topic started by: wbaxter90 on July 17, 2010, 04:11:11 pm
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the first two i snapped was because my pulleys were shit alloy ones, but i thought that buying a solid steel set would at least make the belts last longer, i dont really rag my car either, so why are they snapping all the time, thats 3 in 3 months!? whats the best belt method to run? toothed belts reduce slips but im finding their not lasting very long lol any ideas? oh and i run 65mm pulleys
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Are you over tightening them? I've only ever had one break in about 5 years of toothed belt use.
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nope, the alloy ones wernt in line so thats the reason they were snapping but the steel kit was fine so why the hell did it snap this time? also ive noticed the small top pulley looks abits bent up around the edges? this was brand new just over a month ago!? im confused
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what belts are you using?
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i was using the german one that came with my steel pulley kit, what should i be using?
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well it needs to be one with the correct tooth profile, no idea what the one that came with your german one would have been. PM PeteG40 and he can sell a correct one. Also make sure you're not over tightening them, they don't need to be as tight as the standard v-belts.
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the german pulley kits often use a 1000 length belt - which we can't supply - only 1040 length
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sounds like a similar kit to mine, runs a 1000 length belt and originally didnt line up i had to make them line up i've wrote it somewhere what i did, other wise pretty sure mine would have been throwing belts.
Jake
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yay my luck just gets better, ive had nothing but problems with this car, ive spend lots of money replacing things with better things to stop things happening again and again but it doesnt seem to be working! what pulley kit do you guys recommend? i just want my car to last more than a week without fucking breaking or i will sell it
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i prefer the psd phase 1 kits, hard as nails and fit well - and half the weight of the german steel ones. But these aren't easy to find.
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Just make the ones fit that youve got now? and just keep an eye out for a psd set up?...
Get some pics up of the pulleys.
Jake
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right, i went and got the old belt and took some pics etc to help diagnose my problem,
first off the belt is as pete said, a 1000 8m HTD
and heres how that looked
(http://i811.photobucket.com/albums/zz37/wbaxter90/belt%20snap/23072010678copy.jpg)
the side looked like it had been doing some rubbing
(http://i811.photobucket.com/albums/zz37/wbaxter90/belt%20snap/23072010682copy.jpg)
(http://i811.photobucket.com/albums/zz37/wbaxter90/belt%20snap/23072010683copy.jpg)
and this kit and belt is like just over a month old!?
then noticed it looked abit grotty down there so hada look
(http://i811.photobucket.com/albums/zz37/wbaxter90/belt%20snap/23072010655copy.jpg)
is the pulley to close to the cover or am i worrying?
(http://i811.photobucket.com/albums/zz37/wbaxter90/belt%20snap/23072010656copy.jpg)
i took the cover off and you could see abit of rubbing
(http://i811.photobucket.com/albums/zz37/wbaxter90/belt%20snap/23072010673copy.jpg)
(http://i811.photobucket.com/albums/zz37/wbaxter90/belt%20snap/23072010676copy.jpg)
i want the cover off permanently! it looks so much better! is their any prob with doing this? i heard stones etc can fuck timing?
(http://i811.photobucket.com/albums/zz37/wbaxter90/belt%20snap/23072010664copy.jpg)
anyway, i then noticed my new steel pulley was somehow bent up in a few places!?!?!? how the hell does that happen?
(http://i811.photobucket.com/albums/zz37/wbaxter90/belt%20snap/23072010658copy.jpg)
(http://i811.photobucket.com/albums/zz37/wbaxter90/belt%20snap/23072010659copy.jpg)
and it was rather scratchy on the inside of the dents - enough to fook a belt
i would put my old pulley on but my garage said the old one was spaced out too much making the belt out of line, can i not just file it down to size? heres a pic of the old pulley
(http://i811.photobucket.com/albums/zz37/wbaxter90/belt%20snap/23072010672copy.jpg)
and last but not least, how do i tension the new belt when i change it? never done it before i know how to loosen the charger but what do i do next, i took a pic so someone could kinda point lol
(http://i811.photobucket.com/albums/zz37/wbaxter90/belt%20snap/23072010667copy.jpg)
sorry for all the pics etc but just need some help with this as its ruining my fooking life!
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oh and you asked if i was over tightening them, i wasnt doing it garage was, i would say it was a tiny bit looser than the cam belt, that to tight?
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You've got a little bit of oil kicking about down there, it could be contaminating the rubber in the belt and weakening it.
No idea why your pulley is bent unless someone has bent it fitting or removing it it's difficult to see how one would get like that.
I've always tightened mine like a cambelt, 90 degrees twist with thumb and finger in the middle of the longest stretch iirc.
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mite be the garage that bent it then >:( its literally came brand new from a box to my garage to the car, so it only leaves them really, and this is the cause imo, its sharp inside those bends and enough rubbing on the belt will easily take out a tooth, and 1 tooth means 6 in 5mins, then snap lol
i dont think the oil would have enough time to do anything to the belt tbh, were talking like a month, its that bloody pulley.
does my old one look ok to you guys? you normally point out dodgy bits so thought id check. but like i said apparently it sticks out too much so mite have to file it down?
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went looking for another belt, 2 places couldnt get a match or had a 1000 8m htd. . . yay! still no bloody car
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looks to me like the belt aint man enough for the job. cus it looks to me like its the same as an old belt (even though it is new) and its perished like when people dont have timing belt changed at intervals and they go bang and u sometimes see the same thing the teeth have become seperated from the belt. u though bout measuring the length and seeing if the aftermarket can sort u out with a cambelt equivalent like from Gates or sumat? cause if the timing belt can take it surely the charger belt should to. or another thing thats just come to mind u aint got tight spots on the alternator? might b a bit random but it thats going tight it might b stressing the belt and damaging it.
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an htd belt should be as strong as a timing belt and supplied by people like gates/optibelt etc.
I've seen cambelts used - but as they have different teeth profiles, they often wear the pullies and the teeth go sharp.
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cambelts aren't right for charger belts, wrong tooth profile as pete said.
You're barking up the wrong tree blaming the belts, loads of people (myself included) used toothed pullies with those HTD belts for years with no issues. I never had one snap on me, I just replaced them every couple of years as a service item. This was using the very first batch of pullies PSD got made up in about 2001/2002.
I'd suggest the pullies aren't properly lined up. Also, is the belt catching on the ARB mount? G40 ones have a small cut out in them for the belts but you might need to make this a bit bigger with the toothed belt.
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i think its mainly to do with the garage over tightening it, am i meant to be able to twist it 90ish degrees? because mine was tense as fook! and the belt stretches on boost so could be the cause.
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yeah I always did them the same tightness as a cambelt, so you can just twist it 90deg between thumb and finger. Doesnt need to be as tight as the standard belts.
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yer think this is the problem, the stretch is just pulling the teeth apart because its to tight, i always assumed it was fine because the garage did it, but obviously not lol
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I've had similar problems and now always buy my new belts from Pete/Club G to go with my PSD'd set up. The belts I've bought from Pete seem to be of a very good quality and, more to the point, consistent quality. The replacements I used to buy from Littlehampton seemed to be a different brand every time and once only lasted a couple of thousand miles!
I'd agree with previous comments about not over-tensioning the belt and I have a theory that the belts are not really designed to fit around such small diameter pulleys (cam and crank pulleys are both bigger diameter) and this could be a factor in early failure..........comments?