Arrowglassrestorer
Seaman Apprentice
- Joined
- Feb 11, 2017
- Messages
- 31
I am rebuilding a 3.0. I had 110psi compression in each cylinder and needed to find out why the low compression. When I tore down the engine I found that the side clearance from ring to groove was .006 on all the top rings on all the pistons. In looking at the shop manual that engine calls for .0012-.0027. I have rebuilt a lot of car engines and that clearance seems a little tight. Is the book right and could this be why my compression is low. BTW I am checking the head and block as well.