I have recently performed a compression test on my 1972 V4. After a little research and reading that the compression ratio as standard was 9.0 I assumed I should be looking for, no hoping for, as close to 175psi, or at least around 150psi.
The cold engine results:
Cylinder 1 = 95, 2 = 95, 3 = 95, 4 = 90.
With a tiny squirt of oil, 1 = 100, 2 = 100, 3 = 95, 4 = 100.
Hot engine result were almost the same as the cold results. The car pulls quite well, but I’ve never driven a 96V4 before this one. I live in the Shropshire countryside, high up Brown Clee Hill, but the car takes the hills with aplomb.
Back ground issues:
Oil consumption is very minimal. It leaks more than it consumes.
Spark plugs are a decent colour after a decent run.
Engine hasn’t overheated with me, but rad has signs of leaking by the cap and expansion bottle is pretty muddy.
I have yet to check the valve clearances.
Am I looking at worn piston rings/cylinder and or worn valve gear? Any guidance would be most appreciated.