No replies to this topic

[logiebaird]

Hi, just completed a compression test.

Cyl 4 170psi
Cyl 3 135psi
Cyl 2 135psi
Cyl 1 135psi

Can anybody tell me what these values could be indicating.

I definitely have an engine that sounds like a bag of loose nuts when under load.

Valve clearances checked, timing chain replaced, ignition timing checked.

Could these values be an indicator as well as the bag of nuts sound that there's some pre ignition going on.

thx