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ok this will b the third alternator belt in a month tried both lengths just keeps throwing them off all pulleys seems straight adjusting the excentric pully but as shown in pics after adjusting you should be able to just remove your tensioner locking pin with ease i have to move it back with 15mm spanner for it to free need help asap as need car for work and also im skint now thanks council tax u fuckers lol

we had a 306 that threw a belt after adjusting, there was a spacer/washer had fallen out from behind the bracket that we hadnt noticed.no idea if this is your problem but thought it might help

from behind what bracket

there is a marker on the tensioner.
So if all is correct it will line up. If not then adjust the eccentric pulley until it lines up
I hope that makes sense,

mikesthedaddy1 wrote:from behind what bracket

I think trem is referring to 306set up its different to hdi tensioner
The tensioner set up on them are like the xud setup.
So hdi won't have the square spacer as mentioned.

u have lost me lol

u can see the belt there how it should be mine sits like this until first turn over then instantly slips 1 vrib off the power steering pully

Sorry if I've confused you,
Have a look at the tensioner if you look below the hole for locking it you will see a marker
This lines up with another marker on the other side.
Download a Haynes bible and have alook at the pics

picks of 3week old belt

u can se how far it comes off due to the ruined belt the rest is ok

It must be too tight or wrong belt
If chewing them up like that.

Have you turned each pulley by hand including the ac pulley.
Something might be locking up if that's the correct belt.

Where are you located mate. I'm in Manchester if your local I will lend a hand.

bit of a mission from manchester im in maidstone mate its only chewing them up like that because when it seems to align itself its 2 teeth off the pas pully

right ive had a look on servicebox and the setup for the hdi is nothing like the 306, apologies if this confused the issue. BUT the fact that one side of the belt is chewed means its rubbing on something, can you try and see what.This is what the 306 did and thats how we found out the belt wasnt running true(straight) on the pulleys causing it to fray.Can you put the belt on reversed and with the engine running watch the belt to make sure it stays sat in the middle of the pulley's??

Have a look on YouTube
Farmer on here put a video on it will be listed as crankpulley but he shows how
To set the tensioners its worth a look.

thats the vid ive been using to help me set it mate will try the other way round cant c it making a difference tho