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Wed Jun 21, 2017 8:19 am

So all of a sudden I'm breaking belts. Is it belt tension? And why now after all this time?

Wed Jun 21, 2017 8:40 am

Hi. Your gonna have to provide more data for anyone to offer guidance.
At a minimum, I'd ask things such as:
Any recent changes?
Pulley alignment
Pulley quality
Using correct amount of shims?
Belt manufacturer?
Engine stock of a fast accelerating engine?

Wed Jun 21, 2017 8:47 am

rockerarm wrote: Hi. Your gonna have to provide more data for anyone to offer guidance.
At a minimum, I'd ask things such as:
Any recent changes?
Pulley alignment
Pulley quality
Using correct amount of shims?
Belt manufacturer?
Engine stock of a fast accelerating engine?

No recent changes. Everything has been running fine for years. The belt was a bit tight though.
What could have changed?

I probably need to adjust the pulley. Are the shims hard to find?

Wed Jun 21, 2017 8:59 am

Hi. Yeaah, check everything mentioned. Folks make comments about the quality of certain parts over another and I would endorse much of this. The chrome or china upper pulley's are crap. I don't buy into the german belt idea anduse the house brand O'Reilly's mexico belt 15355. Last a year or two, daily driven.
The shims are an easy find. I gotta box of them. Most old school air-cooled shops should also. Just gotta make sure you utilize enough so the pulley halves are tight when nut bottoms out.

Wed Jun 21, 2017 8:59 am

tenseventythree wrote: rockerarm wrote: Hi. Your gonna have to provide more data for anyone to offer guidance.
At a minimum, I'd ask things such as:
Any recent changes?
Pulley alignment
Pulley quality
Using correct amount of shims?
Belt manufacturer?
Engine stock of a fast accelerating engine?

No recent changes. Everything has been running fine for years. The belt was a bit tight though.
What could have changed?

I probably need to adjust the pulley. Are the shims hard to find?

Nope... https://www.thesamba.com/vw/classifieds/search.php...ton=Search

Wed Jun 21, 2017 9:28 am

John Moxon wrote: tenseventythree wrote: rockerarm wrote: Hi. Your gonna have to provide more data for anyone to offer guidance.
At a minimum, I'd ask things such as:
Any recent changes?
Pulley alignment
Pulley quality
Using correct amount of shims?
Belt manufacturer?
Engine stock of a fast accelerating engine?

No recent changes. Everything has been running fine for years. The belt was a bit tight though.
What could have changed?

I probably need to adjust the pulley. Are the shims hard to find?

Nope... https://www.thesamba.com/vw/classifieds/search.php...ton=Search

As soon as I replied I looked at the frickin pulley and remembered. It's been awhile.

Wed Jun 21, 2017 9:35 am

So upon further inspection. The rear half of the pully is cracked and gel apart iPhone the loosening of the nut.

Wed Jun 21, 2017 9:42 am

tenseventythree wrote: So upon further inspection. The rear half of the pully is cracked and gel apart iPhone the loosening of the nut.

Hmmm...I see your problem. :lol:

Wed Jun 21, 2017 9:45 am

Good job. When shopping for a replacement try and set aside low cost here, as cheapo's will need replacement soon. Remember this pulley spins at nearly 2x crank speed.

Wed Jun 21, 2017 10:37 am

John Moxon wrote: tenseventythree wrote: So upon further inspection. The rear half of the pully is cracked and gel apart iPhone the loosening of the nut.

Hmmm...I see your problem. :lol:

Didn't even notice the autocorrect. What a day. Now the remnants of the rear pulley are stuck on the shaft.

Wed Jun 21, 2017 10:43 am

you can try walking it off with 2 large screwdrivers or resort to an iphone puller if necc. :wink:

Wed Jun 21, 2017 11:24 am

c21darrel wrote: you can try walking it off with 2 large screwdrivers or resort to an iphone puller if necc. :wink:

I ended up using motorcycle tire "spoons". And now the belt I bought is too long even with all the shims out.

Wed Jun 21, 2017 11:27 am

This?
:lol:

http://m.ebay.co.uk/itm/151985149164?_mwBanner=1

Wed Jun 21, 2017 11:32 am

Well played!!^^^^ :)

Wed Jun 21, 2017 2:13 pm

tenseventythree wrote: c21darrel wrote: you can try walking it off with 2 large screwdrivers or resort to an iphone puller if necc. :wink:

I ended up using motorcycle tire "spoons". And now the belt I bought is too long even with all the shims out.

With oem style of pulleys a 15355 belt should work. It has for me for 20 years.
15355 equates to 15/32 inch wide and 35.5 inches long.
Wear does occur with the lower pulley and I've seen the aftermarket alt stand be a tad bit short.