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Q: What causes a broken valve?
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Broken valve spring


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Type your answer here... Burnt intake or exhaust valve, hole in piston, broken piston rings, bad head gasket, valve spring broken.


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It is probably a broken valve spring.


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A stuck lifter, a stuck rocker, a stuck valve, a messed-up cam drive timing and a valve impacting the piston head....


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Sounds like the valves are not closing properly. Something in the valve train is damaged. Could be a bent or broken valve, broken valve spring, broken or bent rocker arm, bent push rod, etc. Low compression combined with back firing thru intake would indicate a damaged intake valve component and back firing thru the exhaust would indicate a damaged exhaust valve.


What causes exhaust backfire on 1989 Mazda B2000?

I have worked on many engines, I would guess broken valve. Check every cylinder with a pressure gauge. If zero broken valve, if all have good pressure, timing. If timing good, fuel. maybe flooding.


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The normal causes for a misfire would be Faulty: spark plug, spark plug wire, ignition coil, ignition module, fuel injector are the most common. Coolant leaking into a cylinder is another. Internal engine problems such as burnt valve, broken valve spring, bent push rod, worn rings


What causes a loud noise that sounds like a wrench hitting inside the engine then die while trying to start?

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