BMW Questions? Ask a BMW Repair Expert for Answers.
Hello, if the cams are not in and all valves are seated the compression from the pistons has no where to go so to speak. If you remove the spark plugs it should then rotate.
I'll open this back up to other experts. With plugs out and valves up I'm stumped to be honest.
Hello. How did you keep the valves seated in order to remove the springs to replace the seals? compressed air?
I am reasonably certain that something has either fallen in one of the cylinders, or something is catching up on the flex plate. Can you insert a bore scope in each cylinder and just make sure there is nothing there? Please let me know what you find with your inspection.
If I don't reply right away, I will asap. Thanks!
the part that the starter engages to turn the engine is the flex plate. the torque converter is bolted to it. Try looking at that to see if something is catching back there.
Since you have no accessories attached, or even a timing chain, the only part outside the engine that's turning that you could check would be the flex plate and torque converter. If those check out fine, and definitely nothing in any of the cylinders then the problem has to be internal.
You say that you had a problem turning the engine before doing the valve stem job?
Is there any way anything could have gotten into the timing cover?
you had valve cover gasket bolts fall in? That could definitely cause problems
I would think that gasket material stuck between your chain and crank gear would cause it to bind up, but am not sure if that's what's happening. Do you have a camera you could look in there with? The same camera used to look in the cylinders would be perfect
your welcome. you'll find it. something has to be caught up either in the chain or in a cylinder somewhere. Just a matter if finding it.