If the timing belt breaks does it ruin the engine?
1995 civic 1.6 ohc vtec , yes it's "J" made
4 door 5th Gen civic with similar engine ,
was ordered that way .think the timing
belt broke does that mean the engine is
It depends on weather it is an interference engine or not
If one of the valves was open (intake or exhaust valve) when the belt broke it is a possibility that the piston bent a valve.
According to the chart I have it looks like yours is a interference engine, so that means that if the timing belt breaks the possibility of the pistons hitting the valves are very high, you can put on a new timing belt and do a compression test to verify this yourself, if you have 1 or more that have bad compression then you will have to remove the head to find out just how much damage was done, most of the time just have the head redone and replacing the valves is all you have to do, but I have seen a fair amount of engines that broke their timing belt at high speed or high RPM's and didn't fair so well, they broke off the valves embedding them in the pistons in turn cracking the piston and that in turn cracked the block, that all happens in a split second. So you really won't know anything until you get a compression.
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