Well after changing the head gaskets on my 2003 sti uk blob and having valve clearance issues , I have now done a compression check again and 1&3 read 120 psi and 2 reads 75psi and 4 reads 90 psi , so it's off to scooby clinic for a leak down test to see where it's going

 

Was the valve seats checked over when heads off?

 

As above - most likely to be micro welding to the valves/seats if the valve clearances were too tight especially on the exhaust side/

Mick

 

I had the valve clearance issue on the exhaust side , I know it's engine out either way just want to know where exactly the compression is going so I know what to repair

 

You will be in good hands at the 'clinic.

Mick