Pulley exploded

[K@rlos]

Coming back from beach yesterday evening heard a noisy like a grenade going off i thought WHAT THE F***!
Then i saw the alternator light was on. Pulled over and there was metal fragments everywhere, the top pulley had literally exploded! Thankfully i had a spare pulley under the rock 'n' roll bed from left over from my alternator conversion and a spare fan belt, fitted them job done bus ran fine. Has anyone had this before? it was a chrome dress up pulley for an alternator. Got a genuine vw 1 now

Karl

 

[maybee]

hi think u awnsered your own question lol

 

[two benders steve]

Yep I've been through 3 cheap pullies (don't think they liked 6000rpm)! i have a great billet aluminium one from ssp now

 

[young_dubya]

i only use genuine vw. for the reason you mentioned :mrgreen:

 

[ProfessorWheeto]

Heard quite a few stories of ***** aftermarket ones cracking and/or exploding.

 

[flynster]

oh dear oh dear karl
cheapskate :lol:

 

[Araon]

yeah cheap dress up or even stock looking pulleys are indeed well known for this that and quite often almost impossible to set up your tension with harmful effects owing to improper cooling and chargeing as they on many are nowhere near true....

your lucky

 

[Grazy]

Chrome dont get you home :shock:

 

[dubscum]

just doing a alternator change (ssp kit) and had to grind about 3 mm off parts of the back (of the rear section of the pully) just to stop it fouling the alternator. It was so bad it would not ly flat on the floor and a sticker with made in tywan :roll: i'll take it off tomorrow and bin it and get a VW one

 

[popcorn balls]

I had to change this bottom pulley yesterday :shock:

 

[maybee]

that cannot be good !

 

[K@rlos]

oh dear oh dear karl
cheapskate :lol:

Shush Steve :lol:

 

[Dirty Harry]

I found this on the wolfgang internatinal site!

It seems that many of you are having problems with the generator pulley exploding. In most cases, the cause of this is not having the correct number of shims. You must have a total of at least 8 shims. If you don't have the correct number of shims, the bell will not tighten on the outer half of the pulley, which will allow the pulley to stay loose. In other words, the inner diameter of the bell bottoms out on the shoulder of the rear half of the pulley. This leaves the two pulley halves loose. They will work against each other causing them to explode, not to mention, it ruins the key way slot on the generator shaft itself.

Many people tell me "mine is fine and I only used 4 shims". Not true - the belt is holding the halves apart, giving the illusion that it's tight. So make sure you use 8 shims. What you don't use between the halves, use under the bell. If you've already thrown a pulley, putting 8 shims on now may not cure your problem. In most cases you have wallowed out the key way slot on the generator shaft, if this has happened to you, the only way to fix it is to replace the generator or disassemble the generator and take it to a machine shop and have a new key way cut into the generator.

 

[gninnam]

Food for thought - I thought the shims could be reduced/increased etc and didn't always have to 8 :?:

 

[BigG]

Chrome dont get you home :shock:

Unless its on a deluxe of course :mrgreen: