Hi..
Tonight the cambelt snapped on the St170 and due to the pressure blew the inlet manifold out of its 4x retaining hose clamps! It went at low revs.
Does anyone know if these engines are prone to bent valves etc or should I chance fitting a new belt and compression checking it first? Wisful thinking maybe??
Your help and advice would be much appreciated.

 

99% probability it will have bent the valves. I've had a couple of belts go on my cars in the past and even just jumping 2 teeth it bent all the inlet valves...

 

Yeah that will be propper fucked

 

Take the head off and see, i doubt you will have got away with it tho snapped belts almost always damage valves.

 

Can't offer any advice. But I've got a st170 engine I'm breaking if you need any bits.

 

thanks guys. on inspection tonight it has no compression by turning the bottom pulley with a spanner very carefully- so head off tomorrow. Hope the damage is confined to the head only and not the whole lot fingers crossed!
Any info or links as to re-timing it all back up again and VVT explanation would be much appreciated? ... not sure how its done on one of these

 

How many miles had it done, out of interest?

 

Got the battery off etc so not sure of exact mileage, 80k roughly. Due a cambelt on time rather than mileage according to service history. It was the tensioner that caused it.
Again, any cam timing info much appreciated .... this week it will be re-assembled with a new head.

 

Haha technical term

 

Ive just bought one on 102,000 miles on the original belt. it was proper fluffy and stringy under the cover ! Caught it in time ! Just turn the crank till the marks line up put a blob of nail varnish on each pulley when they are inline is how i did it, didnt need anything different timing up to a normal zetec

 

You were lucky then as the VVT can be a bitch and throw a wobbler if you dont loosen the pullies and set the VVT pully correctly.

 

Mine runs fine? we just marked the pulleys so the marks lined up, lined the crank up, made sure it piston one was at tdc whipped the old belt off, waterpump in, new belt on. job done. runs a dream.

 

Sorry for the poor quality but hope this helps

 

Yeah must say done loads of belts on these if the pin and bar go in leave the VVC alone same as with the Clio Cups etc