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Old 09-20-2004, 08:51 AM
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Timing Belt

93 Eagle Talon 2.0L DOHC..... Buddy of mine broke his timing belt going down the road. He did not know it at the time and he kept trying to start the car. We replaced the timing belt and the car would not fire up. We figure maybe we lined the no. 1 sp plug TDC on the exhaust stroke instead of on the compression stroke, so we took the belt back off and turned the crank over to TDC on the no. 1 sp plug. Still no fire. So, my question is, do you think he messed the valves all up when he kept trying to start it when the timing belt was off? We lined everything up right, just as the book said. The only questionable move we made was getting the no. 1 sp plug TDC on the compression stroke (but to eliminate that possibility, we tried it both ways). If the belt was off of the DOHC's at the time he kept trying to crank it when the belt was off, how would that mess up the valves?

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Old 09-20-2004, 09:39 AM
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Yes, it is entirely possible that you messed up some valves. It is whats called and Interference engine meaning that the pistons move up into the valve opening area. Obviously they do not hit each other when they are timed right but since your timing belt is broke they can collide. When you are turning over the engine without the belt your pistons are still traveling however whatever valves were left open are being mashed on. Id look into that and do a compression check and see what you come up with.
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Old 09-20-2004, 10:22 AM
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If it was running, you can bank on bent valves!!
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