Compression Test Result on a Cosworth
Hi can somebody let us know what kind of compression readings/results we should be getting from a 4x4 saph with around 106k (not too sure if its been rebuilt but know the top end has been done @90k)
On a dry test we got the following results:
Cyl 1: 160 psi
Cyl 2: 135-140 psi
Cyl 3: 140 psi
Cyl 4: 150-160 psi
On a wet test (dropping some oil into each bore/spark plug hole)
Cyl 1: 160 psi
Cyl 2: 145-150 psi
Cyl 3: 150 psi
Cyl 4: 160 psi
Car starts & drives fine no overheating, losing/mixing water etc...
The reason the test was done because it seems to give out blue'ish smoke now and then. When the spark plugs were removed for the test no. 4 plug was covered in Oil, is this normal?
Any input appreciated