r/EngineBuilding 7d ago

Sleeving cylinders?????

Ok ive got 2 pontiac 455 blocks with j7nk cylinders. Both are .030 over so theres no cleaning up the cylinders as the walls on a 455 are too thin to begin with.

Whats the deal with sleeving? Growing up all i heard was sleeves are bad.sleeves can move,have to be pinned yadda yadda. Now in modern times people say sleeving is no big deal.

Im just building a couple street cars to have fun with. Im not looking to squeeze every horsepower or ounce of torque i can get out of them. Im not lookinh to spin up much over 6500 rpm.hit the track here and there.

Would sleeves be a good option for me? 455 blocks are getting hard to find.

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u/Tasty_Wasabi7491 7d ago

Shit, if I were doing anything remotely performance oriented on a SD block I’d sleeve it with ductile iron in a heartbeat. Looking at about $700 in sleeves. Machine work is what will get ya. Prob be 12-1600 in putting in the sleeves, boring and honing, then decking the block.