Engine/Transmission (1994 - 1998) Bore it or sleeve it?

[PKirby]

I have a 1994 12 valve engine from a burned UPS truck that has some heavy pitting in 2 cylinders that won't hone out, the other 4 still have the crosshatches. I also have access to a 1990 bare block that had a broken camshaft. Will the blocks interchange, or would I be better off to have the block bored or 2 sleeves installed? Who has the cheapest engine kits?

Thanks.

 

[WDaniels]

PKirby,

The tolerances on this engine are unbelieveably tight. I think the service manual says if you are 1mm oversized on the bore, you need to take the block in where they will remove the sleeve and reinstall a new one.

WD

 

[Joe G.]

The original engine does not have a sleeve. A sleeve is installed by boring the cylinder and pressing the new one in. The whole thing is described in the service manual.

 

[keimmmo]

Why did the cam break in the 90 block? If the cam bores are out of line it will break a new one... if you can even get the new one into the motor in the first place. I would be afraid of anything that has suffered carnage!



Steve

 

[PKirby]

I have read the cams were made of a lower quality material, (chilled iron), on the pre-94 engines. I have not checked the line bore on the block cam journals. I think I will have the 94 block bored . 020 over and use it. The machine shop I use recommends that route also.