I started to size the rings for my 401 today and have found that I need to grind about 3/8" off the compression rings just to get them to fit the bore. It's been 20 years since my last full motor build, but I never recall having rings that oversized. Is this normal for 401 rings??? I am wondering if I have correct rings or not. There is no ID on the package. Any help appreciated. Thanks Patrick
I have used file fit rings but that is too much. That is like chop and remeasure fit rings. I think you need to get a new set. Cutting that much off the rings will cause distortion when installed. They are not supposed to bend that much. It would be like selling universal fit rings-cut off at point 'A' for Ford, 'B' for Chevy, 'C' for Buick etc....
Sounds like the idiots sold you a set of 425 rings. :error: Send them back! When you get the correct set, be sure the rings don't fit too tight in the piston groove.....particularly the top rings. That happened to me once, and I can't remember what brand of rings they were. ou: I think the spec is 1-2 thousandths.
rings I agree with Joe. I would bet my hat that they gave you 425 rings. They are an 1/8 in bigger, which sounds just about the amount you have over. Take them back ad tripple check them when thay give you the new parts.
Thanks Thanks all. They are 425 rings. Carmen is sending correct parts. I appreciate all the feedback.
