if the timing belt brakes will it bend the valves?

Question

i got a 2000 volvo s80 and the timing belt broke, do you think the valves bend?

sorry i mean to say "breaks"

Answer 1

assuming that it has the 6 Cylinders 2.9L EFI DOHC engine
it is an interference engine meaning the valves will get bend if timing belt breaks or slips when the engine is running.

Answer 2

"Brakes" are a device used to stop motion, usually by friction. So I assume you're asking "if the timing belt breaks..." and the answer is yes, with a providing thrown in for good measure.

In some engines, there is room enough to the piston to be at the very top and the valves to be open, if others (known as zero clearance engines) when the piston is at the top, the valves had best to closed because there is zero room otherwise. They can bend, but what usually happens is the piston will hit the open valve and get a hole in it. Either way, bend or break, you're looking at a very expensive repair, which is why they recommend the timing belt be changed after a certain number of miles.

Answer 3

The answer depends on whether the engine is "free-wheeling' or "interference" design. Most Fords won't bend valves because there is enough clearance between the valves and pistons (freewheeling). Other vehicles don't have any tolerance to piston/valve interference (interference engines). The one way to find out is to have the shop do a cylinder leakdown test on the engine. This can be done before replacing the timing belt if you're concerned about the expense of putting the timing belt on then finding out that the valves are bent. A cylinder leak-down test is done by removing the spark plugs and filling the combustion chamber between the piston and the valves with compressed air. If a valve is bent the valves won't seal the chamber and the combustion chamber will "leak" the air out. This test will tell you if you bent the valves or not. You can then make a decision on whether or not its worth the repair expense.
hope that helps

Answer 4

The likelihood of bending the valves is slim. I am not familiar with Volvo, but on American made cars since the early 90's, the manufacturer's made relief cuts into the pistons to allow for no damage to the engine should a timing belt break. I would change the timing belt on regular intervals to ensure that you don't get stranded. About 60,000 miles between changes is the accepted interval. I have had belts go over 100,000 miles and I had one break at 46,000, so it's a good idea to just do it before you get stranded out on the road.

Answer 5

Volvo S80 Timing Belt

Answer 6

It is a lot more likely to ding a piston but it can also bend a valve stem. If it damages a piston, then when you replace the belt and drive, it would likely burn a hole through the damaged piston and wind up destroying the engine. The only way to tell for sure what, if anything, was damaged is to remove the head and inspect the valves and pistons. Good Luck.

Answer 7

yes the chances are very likely that it the valves bent. When that timing belt brakes or jumps, your cylinder head can take a mean beating. Expect to pay anywhere from $4-6k for a rebuilt head. Sorry and good luck.

Answer 8

It could destroy the engine. The valves sometimes crash into the pistons, and I guess "bend" is what you'd call what happens to them. Get a GOOD mechanic to check the engine carefully.

Answer 9

Some engines yes, and some engines no, it depends on whether or not your engine is considered a "clearence engine" (IE has enough space between pistons and valves) the dealership should be able to tell you, ask other sources too so that they can not charge you for work not needed.

Answer 10

it shouldnt if its got a overhead cam.