Technical Mk1 1.2 Punto 75 keeps slipping cambelt

[Punto Bizz]

The cambelt on my Mk1 1.2 Punto 75 will not stop slipping, no matter how tight you tension the belt.

I fixed it last night and started the drive to work this morning only for it to slip again. I now keep the tools needed in the car so re-timed and tightened the belt only for it to go again minutes after I started it with me stood looking at the engine.

I'm now thinking the teeth on the crank pulley are worn, any ideas?

Any help much appreciated.

 

[jellyhashman]

Daft question is the cam-belt new ?

 

[Punto Bizz]

Daft question is the cam-belt new ?

Not a daft question at all.

A bit more in depth history.
I bought the car about 6 months ago and put it through the MOT which was rear wheel cylinders a tyre. After about a month of driving it slipped for the first time pulling out of a parking space. My friend runs a garage so he recovered the car and fitted a new belt and tensioner. This one lasted about 3 months before it slipped, this time I had just started the car and not even driven off and the engine died. I re-timed and tensioned the belt myself and drove it for about 2 weeks with it squealing as I put too much tension on the belt which ruined it.

A second new belt was fitted and this lasted another couple of months and slipped driving out of a parlking space on Tuesday night. I re-timed and tensioned the belt myself and drove it for about half a mile before it slipped again. Again I re-timed and tension the belt myself and drove it 1 mile home. It sounded like it was a bit tight again so I loosened the tension a fraction and drove to work this morning. You guessed it, 2 miles from home it slipped again so with tools in the boot I did a road side repair only for it to go again with me stood looking at the engine after just starting it up. It is at the side of the road as I type.

The bottom crank pulley is the only thing we can think could slip.

 

[Punto Bizz]

More road-side repairs took place this morning.

I took the cam belt off and turned it around so the worn side of the ribs were on the non driven side. Re-timed, tensioned and managed to drive it to the garage.

The teeth on the bottom pulley did look a bit worn when I changed the belt over this morning. so got a new bottom crank pulley coming and a new belt kit, hopefully this should end the slipping.

 

[blu73]

if the teeth are looking worn then its the likely culprit. Good luck.