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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: May 2009 Posts: 134 Wrench Fetcher | | Wrench Fetcher Joined: May 2009 Posts: 134 | you guys are like my hero's I'm super sorry so many question... I do have 30 years of working on engines and I have every manual I can find on these things... what I'm missing is the years you guys have on these old girls... is there engine sleeves for these GMC's and is there any for the older 248's thanks katrina
I like fixing stuff.
| | | | | Joined: Mar 2005 Posts: 1,636 'Bolter | | 'Bolter Joined: Mar 2005 Posts: 1,636 | Yes. Any machine shop that bores engine blocks should be able to get a sleeve for your engine. The block has to be bored for the sleeve though. Once installed the sleeve may have to be bored to match the pistons that are being installed.
These engines do not have removable sleeves like some diesel engines do so the block does have to be bored for the sleeve. | | | | | Joined: Feb 2004 Posts: 29,875 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,875 | There are two different wall thicknesses on sleeves, 1/8" and 3/32". and they're produced in diameters that step up about every 1/16" from about 2" to over 5" diameter. Just pick a diameter and sleeve length that's close to the bore size you want, install it in the block, and bore it to fit the piston. The sleeve doesn't care if it's in a stovebolt or a Jaguar, or a Massey-Ferguson tractor, as long as the hole is the right size.
One precaution- - - -there must be at least 1/2" of undamaged block material at the top and bottom of the cylinder, otherwise it's virtually impossible to avoid coolant leaks. If a rod has knocked a hole in the cylinder wall, use the 1/8" wall sleeve to get the most strength around the hole.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
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