correct replacement alternator belt?

[ctcrmcou]

I received my replacement alternator belt from an on-line beetle supply, and it looks thinner than my current belt (belt width and length matched).

So, I checked my new highly praised bentley manual for the belt specs, and to my surprise I could not find the specs anywhere in the book for the belt. (If I missed it, please let me know where it is.)

Basically its 11.3 x 912 Contitech, but like I said, it looks wimpyer.

Is this belt going to work?

Thanks.

[julrich366]

11.3 x 912 is the stock size for an alternator belt.

Just to be sure, check on the size actually stamped in ink on the belt to make sure right belt was put into the cardboard outer sleeve marked
11.3 x 912.
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'74 Vert ..lot's to still do.

[Nicksan]

The generator belt is thinner than the alternator belt, I had been using a generator belt on my alternator for a long time and didnt know it I recently purchased the Conti. alternator belt and could not get it to install at all, on stock pulleys.
I went and bought a gates 7355 and in two minutes It was installed and I was done.

[Viande]

You should be able to get the correct 11.3x912 belt from your local VW dealer. They may have to order it but the part number is 111903137E. Not cheap but it is correct and you can save a lot of time trying the wrong belts. Good luck
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[ctcrmcou]

I knew there was a problem. Feedback is so important from those with experience. Thanks.

[Antonio Trejo]

What Viande said: genuine VW fan belt
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[ctcrmcou]

I've got it in the Cart! Thanks. I'll give the other POC (piece of crap) to my dog to chew on.

[PatterBon]

I run a 9.5 x 905...

It's as tight as it should be and fits fine..I have a 73 standard.
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1973 Standard Beetle
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US Army CH-47 Chinook Helicopter Repairer November 2013 - July 2024

[Mudpump]

The 11.3 x 912 Contitech is the correct stock belt and it's as good quality as you get. There's plenty of beefier setups but not needed on a stock ride.
OEM VW belts? If they are the same price I would get them but you are just paying a premium for the VW stamp on a belt. I can see OEM being better on some parts (maybe) but Conitech is a very good belt

[ctcrmcou]

I got my Contitech 11.3 x 912 (the part number at CIP1.com matches the recommended 111903137E model).

AND, it's way too tight to get on the pulleys, even with all shims added inside the alt. pulley plates. It's visibly smaller than the current belt by a bit, so I don't get it. I'm sure there's no "stretching" procedure, is there?

[PatterBon]

Try the 9.5 x 905..I'll take a picture of it and post it up, the set up I have now is 3 shims on the inside of the pulley and 5 on the outside of the pulley, (I hope you know there should always be 8 shims on the pulley) but the belt is nice and tight with about 1/4'' of defection as specificed in the VW manual. I was running a 11.X x XXX and it was always way to loose.
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PNW Dub Folk & Kitsap dub Folk (KdF)
Austin Aircoolers VW Gang
2020 Ford F-150
1973 Standard Beetle
1969 Cessna 172K Airplane
US Army CH-47 Chinook Helicopter Repairer November 2013 - July 2024

[ctcrmcou]

Isn't that a smaller diameter? That would just make it tighter.

[BUGGED11111]

If the stock belt doesn't fit then something isn't correct Either you don't have a stock alternator/pully or the correct amount of shims

[PatterBon]

I work at an ACVW shop, and when it was time for me to replace my belt, my boss told me to put the 9.5 x 905 on, I have the stock alternator pulley and stock crank pulley, and the tention on the belt is perfect. The previous belt I had bought was a 11X x XXX and it was to loose. No matter how many shims I removed it always was way to loose, but the 9.5 x 905..is what I'm using and its what I suggest.
_________________
PNW Dub Folk & Kitsap dub Folk (KdF)
Austin Aircoolers VW Gang
2020 Ford F-150
1973 Standard Beetle
1969 Cessna 172K Airplane
US Army CH-47 Chinook Helicopter Repairer November 2013 - July 2024

[birddog1]

Possibly the pulley is stock but aftermarket. There are some variations in pulley sizes that are sold as stock. I've never had a problem with the 11.3 x 912

[1970flordecanabug]

Hey everyone I'm new to the bug world and learning as I go so please tolerate my ignorance.
I've converted my generator to an alternator. When I purchased the alternator I was not told that the belts were different. Now I have a dim "G" light when I start the car. Then tension on the belt is not too tight or loose but could this still be the problem, wrong belt? Thanks

[andk5591]

No - And the light may be on until you rev the car the first time and then the light should go out. Assuming you are using one of the 2 wire Alternators with the internal regulator.
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There's more, but not keeping them...

[kreemoweet]

Which belt you should use depends very much on which pulleys you have on. Just because you have an alternator does not mean the original
"alternator belt" will fit. In my case, the standard 11.3x912 alt. belt is far too tight to even be installable. VW must have made a special
alternator pulley which is different than the generator pulleys and just about all aftermarket pulleys which claim to be suitable for both. Having to goose
the pedal to get the gen/alt warning lite to go out is probably the result of using a gen. pulley, which I understand is slightly larger in diameter, and
therefore turns at a slightly lower speed, than the actual alternator pulley.
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