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Author Topic:   engine problem
Whitelightning
Dirt Freak

Total posts: 429
posted October 06, 2005 09:35 AM  
Scenerio: I have a engine that was running fine at end of season no smoke no nothing, but decided to freshen it up. It is 40 over 2.3 engine and had wiesco pistons and total seal rings in it, however when he rebuild it he went back with a stock type ring. After two races I see white smoke coming from exhuast and from crack case breather. It got heavier the next race so I checked the plugs and the number two was damp, and the number 3 was covered in oil. I took engine apart cylinder wear was very minimal hardly no ridge at all at top. The top ring on the number three piston was broke and the top of the piston had a very small place where it appered the top of piston was thinking about lifting off it was a little unlevel in one spot near top. So I had another matching piston and only two races left so I put in the new piston and (I KNOW I SHOULD BE BEAT) and a used top ring. IT seemed to be ok but had litte smoke after race and then got worse after the second race. So I got to fix this problem again. Whats some of yalls opinion on it. I have not pulled it apart yet but I am guessing ring again. What I think may have happen is upon rebuild with the differnt rings they are either the wrong ones for that paticular pistion or the ring gaps are to close. I was thing about trying to make a race next week, I wonder if I put total seal rings back would it fix my problem or can yall think of something else to do

leapinlizard
Dirt Freak

Total posts: 402
posted October 06, 2005 10:05 AM  
Piston top lifting off is a classic example of rings ends butting. Your broken rings further indicates the problem. My guess is you rings and piston are not the correct size. If there was any kind of ridge at all, the new rings will hit the ridge and cause them to break the rings, and the piston crowns as well.

goinrcn44h
Dirt Freak

Total posts: 205
posted October 06, 2005 02:59 PM  
before you put the backup piston an rings in did you check the ring end gap by themselves in the cylinder..?? that would be the first thing I do. also check the clearance around the piston in the cylinder, basic stuff first then if its all good move on and dig deeper. likely wont have to though.
44H

Whitelightning
Dirt Freak

Total posts: 429
posted October 06, 2005 03:12 PM  
how do you check cearence around piston to the cylinder walls, thanks all

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