Super M Pistons

mark20 · Apr 3, 2018

Bought a Super M last summer , runs well but the compression test was all over the place. Pulled the head, first 2 Pistons closest to the gas tank are good and are 4", 3rd one is a fire creater and is 4 1/8 . The last one next to the rad is pitted really bad as well as the sleeve. What's my options , replace all with 4", try to find 3 that are 4 1/8. What's the best way to pull the sleeves. Thanks

mccormicksw4 · Apr 3, 2018

I would rebuild the engine. whoever was inside it before was a backyard mechanic! no telling what else is cobbled up

mark20 · Apr 3, 2018

I was planning on rebuilding it but not right now. I was hoping to replace the Pistons and get it back up and running. It's got good oil pressure but I haven't got the piston and connecting rods out to check out the bearings

D beatty · Apr 3, 2018

I would tare it down and build it from ground up using 281 pistons and sleeves.I would also rebuild clutch at the same time.

mark20 · Apr 3, 2018

whats the best way to pull the sleeves?

Janicholson · Apr 4, 2018

The kit without bearings on this site id ~120 or so. With high compression pistons and overbore. There is no advantage in money
or time at that price . The sleeves are pulled with a stepped puck that fits nder the sleeve and uses a 3/4" threaded rod and a
bridge to pull them up. Jim

Super M Pistons

mark20

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mccormicksw4

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mark20

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D beatty

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mark20

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Janicholson

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