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if the belt broke there's always a chance the valves broke. my friend worked on one EJ25 with a broken timing belt. if i remember correctly 2 valves needed replaced but otherwise there was no damage to the engine block or heads. i'd just plan on a head gasket job and replace any bent valves.

 

a leak down test should tell you if the valves are good and allow you to avoid all the work.

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if you're curious whether a belt broke or not just pull one of the side timing belt covers. takes about 6 minutes to check the belt.

 

a broken timing belt motor is going to sound different than one in perfect running condition. the crank is turning but none of the valve train is which means there's probably less resistance.

 

but that doesn't tell you anything, there are other things that will make an engine turning over sound different as well.

 

good luck.

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