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To Sleeve or not to sleeve

R

Rodd

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Antelope, CA
My machine shop called and said they have to bore the cylinders .40 over since the one was so bad. There are 2 ways of going here. I can have them bore it out and purchase new pistons and rings at an approximate cost of bore + pistons + rings is $1700 give or take. Or I can have them sleeve all the cylinders to the stock bore and use the pistons and rings I have for a cost of $1000. What are the pros and cons of both? I know boring it will give it a little more power but at what expense? How much will it weaken the block?
 
Sleeve it. extra power from larger bore is like 1 psi boost-not enough to be worth it imo.

The heat issues- that's why 6.5 had more issues than 6.2 I think. thicker walls are a really good thing for this engine.
make sure he checks it really well for main web cracks first.

I have the sleeve part number at home I can look up for you if needed.

wonder if there is a way he can seal the wet hole head bolt threads while it is chopped open...
 
The one engine I had sleeved they didn't totally take out the old cylinder wall. Kinda interesting watching them do it. Put the new sleeve in a bucket full of dry ice and gas and then had seconds to hammer it in.
 
I've always wanted to sleeve an optimizer down to a 6.2. But that will require getting new pistons and having them coated.
 
Will L. said:
Sleeve it. extra power from larger bore is like 1 psi boost-not enough to be worth it imo.

The heat issues- that's why 6.5 had more issues than 6.2 I think. thicker walls are a really good thing for this engine.
make sure he checks it really well for main web cracks first.

I have the sleeve part number at home I can look up for you if needed.

wonder if there is a way he can seal the wet hole head bolt threads while it is chopped open...
Click to expand...
Thanks Will. I forgot about the heat issue. There was 1 main crack that they repaired. Where is the wet hole threads on the block?
 
They said they could use ductile iron sleeves if I wanted them to but it is more expensive. I'm assuming the standard sleeves will work just fine.
 
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