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When you crank the engine does the crankshaft pulley turn?
Does the camshaft pulley turn with the timing belt?
Hello, my name is Dan.
Either your timing belt tensioner failed, timing belt loose or off crank sprocket. Or you sheared the key way on the crank spocket.
Yes you could have bent valves. If it broke while running.
You still may have bent valves. put a new belt on and see how it runs. you will know right away. Replacing a timing belt is alot easier than cylinder head work.
you cannot do a leak down or compression test, because the belt is not moving. If you have a bore scope you could remove spark plugs and look with the camera at the top of pistons and valves. You could remove valve covers and see if any valves are stuck down farther that the rest. You could also remove intake manifold and exhaust manifold and look at the valves.