Question about sleeved engine.
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Drifting
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From: Gettin crazy with the Cheez Whiz! OK
Question about sleeved engine.
I have a 327 that I pulled out of a vehicle that had been sitting for awhile. I cleaned it up, dissasembled it and took it to the machine shop and had it vatted and checked for cracks. The machinist told me it was fine, but that one cylinder wall would need to be sleeved. He said all the others would clean up when I had it bored .030" over, which I planned to do anyway. My question is: Is there any disadvantage to having that cylinder sleeved? Will it affect strength in any way? I really would like some advice because I don't want to go ahead building this engine if there is something wrong with that.
Thanks
Jason
Thanks
Jason
Drifting
Joined: Aug 2000
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From: Annapolis MD
Re: Question about sleeved engine. (jdharkey)
Done well a sleeved engine would be fine for most street motors. If it were the correct and original block for the car I would say sleeve it. If it's a stock HP driver and you can't afford another block a sleeve would also be ok. My personal preference would be to look for another block instead (unless 327 blocks are real hard to come by, I've never looked for one).
I had one sleeved cylinder in the first motor in the boat. That motor broke a crank (I'm sure not related to the sleeve) so I never got more than 10 hours run time on it. When I rebuilt the motor I went a found a different original bore block to start with instead.
my $0.02 - Greg
I had one sleeved cylinder in the first motor in the boat. That motor broke a crank (I'm sure not related to the sleeve) so I never got more than 10 hours run time on it. When I rebuilt the motor I went a found a different original bore block to start with instead.
my $0.02 - Greg
Le Mans Master
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From: delmont pa
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Re: Question about sleeved engine. (jdharkey)
make sure that you have it "stepped sleeved" so the sleeve can not slip down. also all aluminum blocks are sleeved from the factory:chevy
[Modified by clem zahrobsky, 11:16 AM 10/10/2002]
[Modified by clem zahrobsky, 11:16 AM 10/10/2002]
Burning Brakes
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From: spring city pa
Re: Question about sleeved engine. (clem zahrobsky)
You should have no problems having a sleeve installed as long as the other cylinders are not bored until the sleeving operation is finished .
geo
geo
Drifting
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From: Reno nevada
Re: Question about sleeved engine. (jdharkey)
Sleeves are OK even in high hp aplications. You real problem is: What is the journal size? old 302/327 had a smaller journal size than the later 327/350 blocks. I would not put a dime into rebuilding the small very break prone size.
Intermediate
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Re: Question about sleeved engine. (jdharkey)
The problem with sleeves is that they leak. The sleeve walls are about a quarter inch thick, and installing them involves cutting into the water jackets. If it's not done just right you'll end up with water in your oil.
I'd seriously consider a custom piston. They can make them any size.
I'd seriously consider a custom piston. They can make them any size.
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Drifting
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From: Reno nevada
Re: Question about sleeved engine. (Lt1er)
I have forgot most of the trivia on motors, but I think the date would have been 66 and older. The 283/302/327 were very inferior crank shafts. You might even add 307's to that list. So much so that GM redesigned the small block to large journals and 4 bolt main caps
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From: delmont pa
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Re: Question about sleeved engine. (Lt1er)
the main size increased in 1967 with the advent of the 350 engine because of the longer stroke making need for more overlap between the mains and rod journals for strength. all other engines got it in 1968 :chevy
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Re: Question about sleeved engine. (Lt1er)
I have forgot most of the trivia on motors, but I think the date would have been 66 and older. The 283/302/327 were very inferior crank shafts. You might even add 307's to that list. So much so that GM redesigned the small block to large journals and 4 bolt main caps
All early SB crankshafts were FORGED STEEL and the SHP versions were
Tuftrided.
The reason the journal sizes were increased on the '67 350 was to restore journal overlap with the longer stroke, and in '68 the journal sizes were made common across the board in order to have bearing commonality across displacements.
Most of these "large journal" cranks were nodular cast iron. Only the SHP cranks remained Tuftrided forged steel. SHP blocks also had four bolt mains, but they were overkill. I have never heard of a street small block pulling the main bearing caps out of the block.
Back in the heyday of F5000 engines, most of the winners were running small bearing blocks and cranks because they had lower frictional losses.
Duke
[Modified by SWCDuke, 9:35 PM 10/11/2002]
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From: the corner of walk and dont walk
Re: Question about sleeved engine. (Lt1er)
. I would not put a dime into rebuilding the small very break prone size.
