Minimum compression pressure is 145 psi.
Standard compression is 174 psi.
A maximum variation of 15 psi is allowed between cylinders.
0 psi for cylinder # 1 means something has given way. It could be the valves are bent or the piston or head gasket has given way.
Except for cylinder # 5, all others are lower than the mnimum requirements.
Checking the valve clearances might provide some insight into the problem. If the valves clearances are out of specs, it could mean bent valves but if they are not, it could mean piston or head gasket fault.
Piston or head gasket problem would require removing the head to check.
Thursday, May 7th, 2009 AT 11:55 AM