200tdi alternator belts snapping

[jbazz]

I'm having some trouble and can't for the life of me figure out why; my alternator belts keep snapping. All of the pulleys move freely and none of them are loose. They all appear to be lined up, only thing I can think is i might be buying the wrong size belt, I have been using 11a1030, does that seem right?
Hoping someone has seen this issue and can share some insight for me

[jboot51]

The correct belt is ETC7939 which is 1025mm
5mm shouldn't make too much of a difference.

[jboot51]

the 11A appears to be correct aswell.
So it's probably not a belt problem.


Is it actually snapping or just falling off ????

[jbazz]

Its snapping, has happened more times then I liked to admit, don't drive her much so never really bothered me much, but going on a bit trip soon.

[BilboBoggles]

You dont happen to have rats? My old range rover snapped a few belts until one day half a rat appeared underneath.

[jbazz]

Nope no rats happens when I'm driving, I put a new belt on the other day drove about 80km~ and it snapped.

[modman]

Diagnose where the damage came from
One side?
Base of belt?
Delamination?
Inspect pulleys, look at wear marks
Stone gouge somewhere maybe?
How deep is the belt being pulled?
I got rid of that mag morelli POS early on and ran a magna Bosch unit
10a more and Japanese electrical reliability
Dc

[Red90]

It is probably the alternator "stalling" on occasion. Change the alternator. I've a friend that went through this same experience.

[jbazz]

Sorry for the late reply, but it turned out the problem was the alternator; must have been seizing up.
Replaced it and all is going well!