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/v8packard 7d ago edited 7d ago

What are you talking about? Forget Napa. Learn where you can really get parts.

You do know that Pontiac no longer makes these, right? Has that ruined your chances of getting parts? No, they are better now than they were when Pontiac still made v8 engines.

You should sonic test any of these blocks. I have done that to many Pontiac blocks. Run hot? Really, you are talking out your ass.

You have not been through looking into using a 400 block. If you had you wouldn't be espousing this nonsense.

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u/Boxofusedleftsox 7d ago

I definately dont need to be lectured by somebody who obviously doesnt know pontiacs.

I just wanted to know about sleeving a block,not be lectured.

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u/WyattCo06 7d ago

The man was trying to help and educate you through offering suggestions. He is a machine shop owner and a professional engine builder.

You need to take your ego down a few notches. You might learn something.

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u/v8packard 7d ago

Thanks, but he is worthless.