[andrew]

Hi guys ive got problems with valves not seating and my compression values are all over the shop
Whats the standard compression supposed to be. ? Im getting sometimes 150 but not equal over all cylinders..but that's prob valves not seating.
Done a heap of kms prob will end up rebuilding.

[jdk81]

200 psi
175 psi is below service limit
Any more than a difference of 15 psi between max-min cyl is beyond service limit

Whats your wet and dry comp values?

[andrew]

150 is like the best wet 2 are down to 100 dry.
cylinders 2 and 4 I think have valve problems. low compress below 100 and don't change when i put some oil around the rings.

[jdk81]

Definitely rebuild time.

Id look for a new donk or possibly consider efi.
Most rebuilds dont offer good bang for buck or last very long.