New head, head gasket now bad compression??
Basically what the title says. Finally got my motor back together today and fired it up only to find it still runs poorly. I have a big vacuum leak but that's fixable without tearing down the motor again (italics).
While searching for the cause of the low vacuum I ran a compression check on the easiest to access cylinders, 1-4, and got a miserable 75, 120, 140, 100 psi respectively. Before I took the motor apart I tested the compression at between 150-160 psi across all six cylinders.
Question is: have I managed to ruin my lower end taking the motor apart or is this a symptom of something else?