[Ian69cat]

top number is first time, bottom number is with oil.
1 - 120/120 valve job?
2 - 110/119 valves & rings?
3 - 100/100 valves?
4 - 135/150 rings?
5 - 110/120 valves and rings?
6 - 120/120 valves?
7 - 10/15 collapsed valves and blown gasket or head?
8 - 10/15

Does my diagnosis seem about right or did i miss something?

 

[gt390xr7]

Looks like a tired engine with either a blown head gasket or a cracked head. You wont know for sure untill you take it apart. The other 6 cylinders are not that bad, but #7 and #8 are going to ruin your day. I'd say you called it pretty good...

Bruce

 

[Ian69cat]

Think a new set of heads would resolve engine troubles for awhile?

 

[69_cougar_uk]

I'd check the gaskets and maybe have the heads skimmed before resorting to new heads unless there is obvious signs of head and/or valve failure. Just my .02

 

[gt390xr7]

I agree, might just be a head gasket and you could get off cheap...

Bruce

 

[Bruce]

The last time I had compression that low in cylinders it was because I had broke some piston rings. I knew I had broke something though because it was running fine just before I got stupid with it. You should be able to tell if the valves/ valvetrain is shot when the valve cover and head comes off. If they look ok in 7 & 8, check the rings.

 

[Ian69cat]

I'm hoping it's heads cause i ordered a set that comes in next week