[Morgzy]

I’m trying to diagnose a crank no start on my M135i 2014 auto. The serpentine belt shredded and was pulled in to the engine through the crankshaft seal. I ran a compression test and all the cylinders are between 115psi - 125psi cold which is low considering these engines usually produce around 180psi. I think it’s a timing issue as opposed to a head gasket or piston rings as it showing low compression on all six of the cylinders. Just wanted to see what other people think before I remove the valve cover.

N55
COLD
Cylinder 1: 120 psi
Cylinder 2: 120 psi
Cylinder 3: 125 psi
Cylinder 4: 120 psi
Cylinder 5: 115 psi
Cylinder 6: 120 psi