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It can happen in some vehicles. That's one of the reasons so many manufacturers have a time schedule for replacing the timing belt.

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Q: When timing belt breaks while running can valves hit the pistons?
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What else breaks when the timing belt snaps?

It all depends on if you have an interference engine or not, if you do valves could hit pistons if running at the time

Is the Volvo B6304F an interference engine?

Yes. If the timing belt breaks while the engine is running you will bend the valves and probably damage the pistons.

1999 zx2 timing belt breaks will the valves be bad?

the ZETEC engine used in the 1999 ZX2 is a non-interference engine. This means that the pistons will not contact the valves when the timing belt breaks. Because of this, the valves will not be bad if the timing belt breaks

What happens if a 1995 Honda Civic ex timing belts breaks?

Usually if the timing belt breaks you have to replace the head or the bent valves. Sometimes the damage can be much worse and the entire engine can be wiped out. When the timing belt breaks, your cams and valves stop moving but the pistons don't. The pistons will smash against the stopped valves and bent them and on some occasions can break pistons as well.

What can be damaged when a timing belt breaks?

The valves can hit the tops of the pistons damaging or breaking either.

Will valves bend if timing belt breaks on vw golf 1400cc 1999?

?If a timing belt or chain breaks while the engine is running the engine will be severely damaged and some of the valves will probably bend and damage the pistons. A timing best needs to be replaced BEFORE it reaches the end of its life and breaks. Car manuals make this clear.

What is a interference engine?

an engine where, in the event that the timing is off or if the timing belt breaks, the pistons can collide with the valves and actually do damage.

Is a 95 plymouth neon a noninterference motor?

No, if the timing belt breaks, the valves and the pistons could clash.

What happens if a Honda Odyssey's timing belt breaks?

The pistons hit the valves and your engine is basically ruined.

Can the valve get bent when the timing chain breaks?

The Simple answer is yes the piston its the valves and possibly damage the pistons

Do you need a new engine if the timing chain breaks on your 1994 Ford Courier?

Damage is only done if the motor is an "interference" design. ie the valves and the pistons overlap in the same place, only kept from colliding by the timing chain. When the timing chain breaks on a interference design, valves and pistons smash together. If it's not an interference design, the pistons and valve won't come into contact if the timing chain breaks, so odds are no internal damage done.

What happens on a 1991 Honda Accord when the timing belt breaks?

Because the Accord 1991 has an interference engine, the pistons will hit the valves and either bend them or break them or both if the timing belt breaks.