Quote:
Originally Posted by reights
I have a 91 mr2 NA. Car ran fine then was parked. return to start the car and sounded like a connecting rod bearing. I dropped the pan all bearings ok. However when i spin the engine it spins and then stops. Sounds like something internally hitting and causing the engine not to spin freely. any possible cause as to such??
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Did the car actually run when you tried to start it but had what sounded like rod knock or did it seize?
Some things to try:
I'm assuming it is seized from what you have said. Stupid stuff first... is the car in neutral?
Does it change when someone is depressing the clutch?
Where are the pistons when it stops? If two of them are close to the top then you might have something in one of those two cylinders. Were any pieces missing from your spark plugs when you pulled them? If the pistons stop part way up then it could be one of the rod bearings. When one spins it will often seize the engine only at a certain crank angle. You can also check to see if it stops when a particular valve is trying to open. Also check to see if it always stops in the exact same place. And don't worry about turning a 5sfe backwards, our tensioner pulley is torqued down once you have set the tension so it won't allow the timing belt to slip.