Sleeving a 261 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Dongray · 04-15-2018, 11:43 AM

I have a 261 that is .080 over and three of the cylinders need to be sleeved due to deep pitting. I am debating on whether or not to sleeve all 6 or throw in the towel on this block since it also needs a line bore. Can someone elaborate on whether or not it is a good idea tosleeve something that is already .080 over and if there are concerns with sleeving all 6?

I have heard that the metal used in the new sleeves are superior and would actually function better than stock. Plus the added benefit of going back to the original bore for more life. Two shops that can sleeve and line bore are quoting 1000 for all 6 and the line bore... kinda pricey and the rebuilding is just starting. I have been looking for other 261s but they aren't easy to find.
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**Dan in Pasadena** · 04-15-2018, 09:03 PM

Personally I’d much prefer finding a useable block that didn’t need sleeves. IF you have to do it will these be dry or wet sleeves?

PS: It’s “align” bore.

**mr48chev** · 04-16-2018, 02:54 AM

Last I looked it was around 125 a hole to have a block sleeved. That was a long time ago.

Add a couple hundred more to align bore it and you have some serious change in just the block that as you said is sleeved.

04-15-2018, 11:43 AM	#1
Dongray Registered User Join Date: Oct 2017 Location: Fort Worth Texas Posts: 88	Sleeving a 261 I have a 261 that is .080 over and three of the cylinders need to be sleeved due to deep pitting. I am debating on whether or not to sleeve all 6 or throw in the towel on this block since it also needs a line bore. Can someone elaborate on whether or not it is a good idea tosleeve something that is already .080 over and if there are concerns with sleeving all 6? I have heard that the metal used in the new sleeves are superior and would actually function better than stock. Plus the added benefit of going back to the original bore for more life. Two shops that can sleeve and line bore are quoting 1000 for all 6 and the line bore... kinda pricey and the rebuilding is just starting. I have been looking for other 261s but they aren't easy to find. Posted via Mobile Device

04-15-2018, 09:03 PM	#2
Dan in Pasadena Senior Member Join Date: Nov 2008 Location: Glendora, CA Posts: 6,341	Re: Sleeving a 261 Personally I’d much prefer finding a useable block that didn’t need sleeves. IF you have to do it will these be dry or wet sleeves? PS: It’s “align” bore. __________________ '55 Big Window Shortbed, Drive-It-&-Work-On-It slid down the "slippery slope" to a Frame-Off Rodstoration! LQ4/4l85e/C4 IFS/Mustang 8.8 rearend w/3.73's Dan's '55 Big Window "Build" - Well, Kinda!

04-16-2018, 02:54 AM	#3
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,705	Re: Sleeving a 261 Last I looked it was around 125 a hole to have a block sleeved. That was a long time ago. Add a couple hundred more to align bore it and you have some serious change in just the block that as you said is sleeved. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.

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