I'm having some trouble re-installing a distributor in an '86 chev 305 truck. It overheated and blew a head gasket. When I took the head off there were 2 cylinders full of antifreeze. I marked the distributor and rotor when I pulled it out but now I cant get the rotor/distributor back to that same mark.
So (stupid me) I just thought "well no big deal - I'll just rotate the engine to find tdc on #1 cylinder (with compression) and the distributor should just drop in and point to #1 cylinder". But now for some reason I can only get the rotor to point towards (approx) the #2 cylinder. I can pull the distributor out and rotate it 180degrees and it will drop in nicely - although its now pointing at the steering wheel. But...those are the only 2 positions that I can get the distributor to fully engage the gear. At any other position the gear just seems to jam.
I'm guessing that the timing chain might have slipped when it overheated? Does anyone know if the distributor can only be installed in 2 different positions?