block sleeving?

[flexin91xj]

Does anyone on here know much about sleeving a block? I found this site if anyones interested. They do imports and domestics and they did a Volvo inline 5 cylinder. http://larryspower.com/index.html
Is it possible to have a jeep 4.0 block sleeved? I kinda have a theory about why its done, but can someone please explain it in more detail though?
Thanks

[SilverXJ]

Sleeving a block is usually done when there is damage to a cylinder that a bore and home can not correct with out removing too much material and making the cylinder wall too thin. It can be done to all cylinders or just one. For example there is a block at the machine shop I work at that has an imperfection in one of the bores. It could bored out, but the wall would be too thin. A single sleeve has been ordered to repair that one cylinder.

As for performance benefits it might be done to extend the bore past the the largest over bore size, however I am unsure about that part. I am also really unsure what that company is doing.

[IH 392]

Usually Iron blocks are sleeved to repair them or bring than back if they are rare and gone, some times they are bored out to major over bores and the sleeves are true, no core shift, but that also weakens the block, virtually all aluminum blocks are sleeved so those advertised in your link are likely new liners for major over bores, I have an LA Sleeve kit in my Yamaha, it's currently 6.5mm over stock.

[herbiehind]

Sleeving a block is usually done when there is damage to a cylinder that a bore and home can not correct with out removing too much material and making the cylinder wall too thin. It can be done to all cylinders or just one. For example there is a block at the machine shop I work at that has an imperfection in one of the bores. It could bored out, but the wall would be too thin. A single sleeve has been ordered to repair that one cylinder.

As for performance benefits it might be done to extend the bore past the the largest over bore size, however I am unsure about that part. I am also really unsure what that company is doing.

what motor is this? is it cost effective to sleeve one cylinder? this is just curiosity . cool?

[SilverXJ]

Its a Jeep 4 cyl. I don't know the costs but its probably more cost effective than finding another block.

[mountaineerjeff]

in the performance world sleeving is done to maintain a stronger bottom end. you would bore out the weaker, older factory metal, and then replace it with a stronger sleeve. this allows for more power output before failure....this is most common with aluminum block especially open deck designs.

[herbiehind]

i've heard of doing it when you want to go beyond bore dimentions afforded by the original material but not as a repair. very cool . i thought it was big bucks.

[BADASYJ]

Yeah I looked into it a bit also. For performance its used to get maximum bore, normally when a block is poured (water passages filled with block filler). The price I got a few years back was about $350 a cylinder. Really only worth it if your going all out on a drag motor.

[herbiehind]

rmw takes the mini 1.6l to 2.0l by sleeving .

[flexin91xj]

Yeah I contacted the company I linked in my original post and the wont do Jeep 4.0's. It was just a thought anyways. Way too much money and overkill for what I want.

[bgiesler]

Hello,
I I have a 1999 Jeep Grand Cherokee 4.0 liter, I picked it up for $550, with the classic mystery knock / tick. I finally have gotten it torn down and found the following things.

Melted Water pump blades, when the pump turns it clicks, since it was hitting the inside of the head.
2 valves stuck open on 3rd cylinder.
3rd piston is starting to fall apart, cracks around top.
My favorite, the 6th piston is missing, I deep gouges in cylinder wall.

I was looking for options and found this post. I called a local shop and asked if they put sleeves in Jeep 4.0 liter engines. The guy says, Oh an in line 6, yeah I do it all the time. He says he will bore the block and install the sleeve for $100. If I want all cylinders bored it will cost additional $135. As prized as the salvage yards consider this engine around here they get $1500 for engine with $130k on it. This seems to be a no brainer. Has anyone else done this and just isn't fessing up?

[Alex22]

Yeah I contacted the company I linked in my original post and the wont do Jeep 4.0's. It was just a thought anyways. Way too much money and overkill for what I want.

Why would you want to ship an engine block half way across the country? There should be a competent machine shop somewhere in CO. I believe what Larry's is advertising is the Darton sleeve system for aluminum blocks. I'm pretty sure one of the guys from CDP and the machine ended up over at Larry's.

yea, I know this post is a few months old

~Alex

[Alex22]

Hello,
I I have a 1999 Jeep Grand Cherokee 4.0 liter, I picked it up for $550, with the classic mystery knock / tick. I finally have gotten it torn down and found the following things.

Melted Water pump blades, when the pump turns it clicks, since it was hitting the inside of the head.
2 valves stuck open on 3rd cylinder.
3rd piston is starting to fall apart, cracks around top.
My favorite, the 6th piston is missing, I deep gouges in cylinder wall.

I was looking for options and found this post. I called a local shop and asked if they put sleeves in Jeep 4.0 liter engines. The guy says, Oh an in line 6, yeah I do it all the time. He says he will bore the block and install the sleeve for $100. If I want all cylinders bored it will cost additional $135. As prized as the salvage yards consider this engine around here they get $1500 for engine with $130k on it. This seems to be a no brainer. Has anyone else done this and just isn't fessing up?

A location would help to figure out if the price is good since it varies by region across the country. Does the 100 include the price of the sleeve and decking of the block?