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Author Topic:   Block repair between #3 and 5
posted September 21, 2004 08:39 AM
OK - thought I had popped a headgasket, but tore the engine down and found not only the gasket "gone" between 3/5 but the block "eaten" into that area - about .040 or so deep (estimate, but it's definately above where the top ring land travels) - can this be repaired economically or is it time for a new block? If it can be repaired what's the cost on it (approx)?

This is my "good" engine - a 377 with splayed mains that I just refreshed about 6 races ago, and I can't afford to build another complete engine right now...

If they can fix it will it need to be bored over again (thus needing new pistons/rings) or can they maintain the current bore? I assume it'll have to be decked to straighten that out and the heads have a matching repair that needs to be done.

A little history for those that care (and what I *think* caused it - guy in front spun 270* and lept in the throttle trying to bring it around - I got hit on the L side by him going over the nerf bar and into the body flattening the header collector to nearly shut - didn't realize it was that bad, but guy had also cut my brand new tire down in the process - ran another lap under caution and then realized I was loosing a tire and pulled off - knowing I was hit pretty good I pulled it into the pits - guessing that was the start of the demise... next time out didn't even get to race since the tranny decided to burn the clutch up, then next time with a fixed tranny - go out for hot laps and it won't pull above 5k RPM,pull off and it pukes water...

posted September 21, 2004 09:47 AM
Ive had it welded up worked great still running block, didn't have to rebore mine just decked.
Morton Machine
Coweta, Okla.

posted September 21, 2004 10:46 AM
JT54 - I had thought about that seeing as how it's not into the bore where the rings ride... I don't know if I'm that daring though . ... I think I'll call around and see if it can be done for a reasonable fee

posted September 21, 2004 02:36 PM
we had it happen to us a few years back because our distributor turned and timing was of and torched the cylinders any machine shop will fix it

posted September 22, 2004 07:48 AM
Had it done 2 times this year. 1 time just the block, the other time block and head. The first worked good and is still together, the second didn't work so well as it lasted all of about 5 laps.

Good luck.

posted September 23, 2004 12:38 AM
Had this happen on our only motor at that time,377,late in the season,no time to be without a motor.Drilled a hole dead center between the cylinders in the slot about 1/4 inch deep.took a piece of 7013 welding rod about 3/8 or so long drove it into the hole and peened it untill the slot was full ,filed it smooth with a fine flat file & put her back together.Ran it the rest of the season,10 or 12 shows,then used it as a backup motor the next season ,ran it several times then it got claimed.