Alternator Pully Size

[baxter650]

I may have found out why i am going through belts, i think that the PO has changed the alternator and used the wrong pulley on it.
The belts are almost flush with the tops of the crank and water pump pullies but ride very high on the alternator.
Can someone have a look at theirs and see if this in normal.
Vince

 

[jamisobe]

Not sure if this could be your issue but I once was having problems with belts not lasting more than a month or so. It turned out that aftermarket belts aren't as wide as the Toyota belts and they where moving laterally in the grooves causing them to disentegrate.

I found that only the Toyota belts have the proper width to fit the grooves.

Probably not your issue but I thought I would at least chime in since it was a big pain for me at the time.

 

[baxter650]

Thanks for your reply, i do agree that aftermarkets dont' fit, however i have even tried wider industrial type belts to the same effect.
C Dan is sending me Toyota belts but i want to make sure i am not just throwing them on to have them destroyed.

 

[jamisobe]

I think you actually want the sides of the belt to have solid contact rather than the bottom of the belt.

When I had my issues we changed both the alternator pulley and put extra effort into aligning pulleys. The end result was that the Toyota belt fixed the problem. What an ordeal.

The solution for me was simple. Use Toyota belts only. They actually turned out to be less expensive than the aftermarket crap.

 

[baxter650]

The belts that are on at the moment ride just were they should on both the water pump and crank pullies maybe a 1/16" above.
Alternator however is above by 3/16" or more, so i'm guessing that the pulley is incorrect.
So all i need to know is if your belts sit in all the pullies at the same depth?

 

[MikeB]

Yes, the belts sit in all the pullies the same. My Toyota belts are just slightly higher than the outer diameter of my pullies.