Hi. I have a 732i 1986 that has some motor problems. Diagnosis so far: Engine runs very rough
Changed all spark plugs, no change.
Checked compression on cold engine Cylinder, Comp
1, 11.5 kg (approx. 165 psi) 2, 0 kg 3, 0 kg 4, 8.5 kg (approx. 125 psi) 5, 8 kg (approx. 120 psi) 6, 10,75(approx. 155 psi)I'm thinking the head gasket is blown as there is no compression on 2 cylinders next to each other. When I look at specifications for BMW engines it seems compression should be about 149 psi, so 2 of the cylinders are a bit hi and the working two others are a bit low, could this be due to broken piston rings? Allso I have no spec as to how much to tighten this spesific engine, the book I have lists all other engine types, but I'm hoping I can use the spec for 733i. Any thoughts on this, anyone?
Best regards
Lars