Cambelt change interval

[gldgti]

how do you know how long the waterpump is going to last because it is also runs off the timing belt.my timing belt snapped on 120 000 km alot of money to fix

Thats right - there are other things to worry about like the water pump and tensioners.

My main point was that belts (usually) are fine for a long time and that you should simply follow the service schedule.

In my opinion, there would have to be a manufacturing defect in the belt to cause it to fail early, unless another component caused the failure.

What engine/vehicle did your unfortunate failure occur with?

For peoples interest - I recently rebuilt a 1.9 turbo diesel vw engine. When I put it together, I put on a new timing belt. After about 1000km, I noticed that the belt began to run off centre of the pulleys - this is often caused by a bent bracket on the engine or some such thing, but is not really a common occurrence. Eventually I found that the problem was the belt itself - it had a manufacturing defect that made a slight kink in the belt which began to make the belt conical, if you like.

I changed the belt for another brand new one and now the problem has gone away entirely.

Just goes to show that there are manufacturing defects in belts out there, but with careful inspection you can pick them up before they cause a problem.