asp pulley wobble
so today belt came off again- actually this time it shredded and when i put a replacement belt on i noticed the wobble in the new asp tensioner pulley and doesnt seem normal but wanted to confirm here
thought it was belts at first so ec recommended trying diff brands which i did to no avail... then i noticed a little scoring on the top of the belts (smooth side) so though tensioner pulley might be the culpret since its the only pulley that touches th smooth side of belt, so switched to ASP tensioner pulley to no avail and now it looks kinda wobbly as in the video, but i couldnt honestly remember what the original MB tensioner pulley spun like so i had no ref as to if this is normal for the asp pulley or not

i def am going to order a new actual tensioner unit that the pulley attaches to because it seems its not holding the dayco belt tight enough... really annoying when you are trying to pull away from someone and then all the sudden car looses like 200hp cuz a belt came of
It sounds like the crank pulley is the culprit, if this issue started right after install. Could you put a vid up of the crank pulley at idle? Did you inspect the grooves of the welded on outer to make sure they were smooth, and no knicks?
Last edited by chawkins2001; Jul 13, 2012 at 04:31 PM.
It sounds like the crank pulley is the culprit, if this issue started right after install. Could you put a vid up of the crank pulley at idle? Did you inspect the grooves of the welded on outer to make sure they were smooth, and no knicks?
it def started right after pulley install but i think that could also be that on stock belt and pulley the tensioner was maybe bad but tight enough and then when changing to the larger pulley and belt combo may have put the tensioner in a range where its not giving enough pressure on the belts allowing them to usually hop off and occasionally shred...
usually when it happens i pull over and the belt is just sitting by the fan shroud untouched and fine and i just pop it back on... i put the belt on in about 5 seconds now from doing it so many times lol
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The pulley just bolts to the tensioner spring housing, so any play in that spring housing can make the pulley look like it is wobbling a little.

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and mine is still throwing belts but i got a tensioner from shardul that i will install probably tonight and see if that fixes it, if not then probably just going to go back to stock pulley and either get the weistec blower when hp/tq, etc numbers come out and when someone else has run it for a while... or i will just sell the car if not.
Last edited by pearlpower; Sep 10, 2012 at 03:56 PM.
super ducking annoy
Last edited by gaspam; Sep 11, 2012 at 03:06 PM.
when changing it i also inspected crank pulley further and noticed a little nick on the top of the outer ring as seen in the pics below... it is kind of scratchy (for lack of better word lol) but its on outer ring above where the belt seats so i wouldnt think it would affect anything... thoughts ?


also on the belts this seems to happen to all my belts where a new belt will have abrasion and exposed inner wires after no time from being installed... i dont think that is normal

all the 51.4 gates belt have been shredding so if this one doesnt then i think the tensioner was the culprit, but if it shreds like all the rest then i gotta believe its the pulley as i never threw a belt before the 172M pulley was added in march.
Wonder if I need a new tensior and that could be my issue?

i think the solution is weistec blower
and back to stock pulley or 168mm depending on what weistec's numbers come out to be on hp/tqotherwise i am giving up on s/c cars and sticking with turbos







