ok i just swapped my 91 4door with a 95 d15z6 block with a y8 head i used the y8 head gasket.. the timing is on point but it wont crank over the cam is spinning but im not hearing nutn from the bottom end what could it be? my boy said im not getting no compression... i took off the head and spun the pully and the crank seems fine no broken rods it spins freely im soo fed up right now please help a fellow ef owner out

 

no help????

 

Can you visually see (or have someone visually see) that the crank isn't spinning but the cam is spinning when you turn the key? Or even without the key, can you spin the main pulley and see that the camgear is spinning appropriately? If not, my initial guess is that the crank doesn't have the timing gear installed. That's the only way I could imagine that the crank and camshaft would spin independently (assuming the camgear is on of course).

You know, now that I think about it, it's physically impossible to have the cam spin and the crank stand still while turning the key. The key actuates the starter which spins the flywheel which is attached to the crank. The crank and camshaft are linked together by the timing belt. The only way the camshaft will spin is if the timing belt is making it spin.

As for your compression, its either the rings or the valves not making a seal. While you have the head off, check the valves. Easy trick, remove the intake manifold (and assuming the exhaust manifold is off which I'm sure it is) and then spray some brake cleaner into the intake/exhaust ports and see if leaks through the valves. If it the valve seats get a little bit wet it's not too bad, if they are dry then it's making a seal. If it just falls right through then you have something obstructing the valve from closing all the way OR the valve is bent.