ChatterBank17 mins ago
What happens when a cam belt breaks?
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You would see that the cam belt has physically broken. The engine would start and the engine would turn over without any compression at all.
If it is broken then it usually major work. On some engines they may try fitting just a belt and see if it starts; if it was a car I was unfamiliar with that's what I'd do first. If it does start and has no compression then it's bent the valves. Major work!
Remove the engine head and inspect the valves to see which are bent. In worst case scenario all 8 (or 16 if it's a 16 valve engine) valves would be bent. Usually it's just 2 - 4 valves bent. The valve guides may also be damaged and check for movement on the pistons. So, replacement valves need to be ground in, then head refitted with new gaskets, usually new coolant etc. Quite a longish and expensive job!
Cost? Wouldn't like to say... anything between �500 - �1000 depending on damage.
There are little upside-down mushroom shaped pieces of metal called valves at the top of every engine.
They open and close in time with the pistons going up and down to let fuel in and gas out.
The cam belt links these valves to the pistons - if it breaks the pistons can hit the valves and do a lot of damage and that means opening up the engine.
Whenever you buy a secondhand car you should always find out when the cam belt was last changed and ask to see the receipt for the work. If you don't have that assume that the cam belt needs changing and get it done as soon as you've bought it. If you know when it was done make sure you know when it needs doing again.
It's not that expensive to get a cam belt changed - it's very expensive to get the damage repaired.
Recommended intervals vary but 70 thousand miles is not untypical.
As KebabMeister says the engine will most likely turn over but not start. The garage will proably have removed the valve cover and turned over the engine if the valves don't move they'll know the belt has gone.
I presume the car just cut out on you with little or no warning.
Thing is the garage will know that they've got a likely captive job if the car is a non-starter so will be conservative on their quote. If it's a main Peugeot dealer it's likely to be very very conservative.
You could try calling a few garages and ask what they'd quote to fix a failed cam belt but don't be surprised if they don't wan't to commit themselves because they won't know how bad it is until they open the engine.
Hope this helps
the engine idles at around 800, thats 800 turns every 60 seconds, that' a lot of turns, drive away and that speed at least doubles, more if you boot it, so even sitting idleing, when the belt breaks will do the same damage, Nowadays, nobody really repairs an engine after a break, well not on older cars, it is often cheaper to replace the whole engine, a second hand engine can be got for about �250, and fitted for maybe another �100.
To fix it, they would , as was said beofre , maybe try a belt on it, you might be lucky, but usually not, there are very few, engines that do not suffer catastrophic damage when a cam belt breaks, next is to remove the head and see how bad the damage is, any bent valves need to be rplaced, thhead would need to be cleaned and probably pressure tested, a new head gasket set can cost �100, and the labour is frightening, the vavles alone can cost upwards of �60 each and there are at least 8, then the pistons have to be checked for damage, and then it all has to be put back together and a new belt fitted, new oil and filter, new antifreeze, very expensive, I normally simply recomend a replacement engine if a belt breaks, it's much cheaper in the long run, of course it depends on how old the car is and how many miles it's done.