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Has anyone ever slipped a stock sleeve?

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Old 12-15-2003, 01:06 PM
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Default Has anyone ever slipped a stock sleeve?

We started looking more into what could have been the cause of my coolant consumption this weekend and finally think we nailed it. we were looking at the head gasket and noticed that on the #7 cyl the graphite was burned off all the way to the steel ring on the gasket from the little holes that allow water to pass through the gasket. While I was busy inspecting the gasket my buddy reaches in to the block and drags his finger nail accross where the sleeve meets the block and it snagged. it looks like the stock sleeve has slipped in an upwards direction.

How often does this happen? and what could have caused it. We are going to take a closer look with some gauges this week to confirm the slipped sleeve, but if thats the problem........... . Looks like its time for a new short block.

TIA
NATASS
Old 12-15-2003, 02:37 PM
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WOW, that is something I NEVER would have thought of on a stock sleeved LS1 block.
Old 12-15-2003, 04:00 PM
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58 views and only 1 reply. this must be asomething pretty rare.
Old 12-15-2003, 04:22 PM
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Looks like it may be time for you to put that 427 in your car Now you have an excuse!
Old 12-15-2003, 05:11 PM
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Did you pressure test the head on that side? How did it pan out?

I have never heard of a dropped sleeve on a production LS1 block.
Old 12-15-2003, 05:52 PM
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Originally Posted by Pro Stock John
I have never heard of a dropped sleeve on a production LS1 block.
Yeah but he's an Open Road Racer 7000 rpm continuous for minutes at a time is a lot more stress than a few 12 second blasts down the quarter mile.
Old 12-15-2003, 06:02 PM
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There is really noway you can drop a sleeve on a stock block. The sleeve is cast in. If you look at the back of the sleeve you will see probably 40 plus grooves that the cast aluminum forms into whe it is pored. For the sleeve to move, you would have to shear all these bond points to shift the sleeve, which is vertually impossible.

Shaun (valvegod@aol.com)
Old 12-15-2003, 06:56 PM
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Eric - Noone cracked a stock sleeve in his car about 2 years ago and ARE was able to replace and re-sleeve the block with no problems.

He was running NO2 at the time and was dynoing the car. When the operator hit the button the charge backfired and melted a slug cracking the cylinder wall.

They can be repaired quite easily.

Paul
Old 12-15-2003, 11:14 PM
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Originally Posted by Pro Stock John
Did you pressure test the head on that side? How did it pan out?
I spoke to Jayson at MTI and he said that they pressure tested the heads 3 different ways and the heads checked out fine.




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