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Engine Specific Info and Questions => IDI Engine => Topic started by: dillenger1 on March 31, 2008, 01:52:32 pm

Title: .40 over sleeves
Post by: dillenger1 on March 31, 2008, 01:52:32 pm

Ive had my block bored out 40 over due to a horrible ridge from the previous bore.20 years or so later am i going to be able and sleeve it back to standard sive 76.48mm and use my old pistons?Just wondering if she'll have another rebuild in her.I realize that this would be a thin sleeve(weak),but what if it were pressed in?would it hold???? :oops:

Title: .40 over sleeves
Post by: zukgod1 on March 31, 2008, 02:15:21 pm

40 over is essentially 1.00mm over which is the larges piston available.

Prothe sells new sleeves for our engines however so you could sleeve it next time and use new standard pistons once again.

Title: .40 over sleeves
Post by: dillenger1 on March 31, 2008, 02:40:53 pm

What do you guys think this will do to the integrity of the block?Im just throwing some ideas around for the future,or maybe another rebuild.

Title: .40 over sleeves
Post by: zukgod1 on March 31, 2008, 03:21:42 pm

If your just doing a stock rebuild and the sleeves are installed correctly I dont see it being a problem.

I suspect it would be a process to get them installed (correctly) and would be spendy.

Hard to say really, maybe call a couple machine shops and ask about it.

Title: .40 over sleeves
Post by: RabbitJockey on March 31, 2008, 03:29:52 pm

i don't really know but i wouldn't think it would hurt the integrity of the block  sleeves are used on lots of engines.

Title: .40 over sleeves
Post by: subsonic on March 31, 2008, 03:35:48 pm

If you are going to go through all the hassle of sleeving it, why not just throw in a set of sleeves so you can run it as a 1.7TD?

Title: .40 over sleeves
Post by: Gearhead on March 31, 2008, 08:37:05 pm

What is a 1.7D?  I have a block that is bored 1.00mm over, and the PO hammered 12mm headbolts into a 11mm head and torqued them.  A few gallons of water in the cylinders later...  I was going to practice making a TD engine with my drill and BMW squirters.  If successful, I'd like to sleeve it.

I was also wondering about a 1.8 gasser block.  Would it be possible to drop sleeves in there?  What are the OD of the sleeves?  I know a pretty sharp guy that really likes sleeved engines.  He tells me that the metallurgy is typically better in sleeves.

Title: .40 over sleeves
Post by: rallydiesel on March 31, 2008, 09:19:06 pm

I'm pretty sure sleeves are the norm in large diesel engines like ships and caterpillar engines so I don't see how they would be any weaker than the block itself.

It is expensive though. I'd try to find a junked block before I resorted to sleeves just for the cost.