No , the 1.6 liter 4 cylinder engine in a 1987 Toyota MR2 is not an interference
engine
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
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.
The valves can hit the tops of the pistons damaging or breaking either.
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.
No, if the timing belt breaks, the valves and the pistons could clash.
The pistons hit the valves and your engine is basically ruined.
The Simple answer is yes the piston its the valves and possibly damage the pistons
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.
If the timing belt breaks, the valves get bent immediately.
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.
In many cars YES, but not all cars.The engines will be "Interference Engines" or "Noninterference engines"When the belt breaks in interference engines the valves strike the pistons and bend.
It all depends on if you have an interference engine or not, if you do valves could hit pistons if running at the time