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#488740 Thu Jan 01 2009 06:40 PM
Joined: Dec 2008
Posts: 1,839
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panic Offline OP
'Bolter
I've tried various searches (here, Google, HAMB, Inliners) and can't find the deck height (crank center to gasket surface) for either series.
I've read that "the 270/302 is 3/16" taller than the 228/248", but is that just 1/2 the stroke difference, or it it accurate?
I've also see references to "the 10.875" deck height is already in the factory tooling, so it's been preserved from the 235, to the 228, to the 292". If both are true, that means the 270/302 is 11-1/16" (10-7/8" + 3/16")?

Thanks.

panic #488759 Thu Jan 01 2009 07:44 PM
Joined: Feb 2004
Posts: 25,692
H
Kettle Custodian (pot stirrer)
It's possible to calculate deck height if you can find a couple of other specifications. You'll need to add 1/2 the stroke length, the connecting rod center-to-center distance, plus the piston compression distance. You'll be within a few thousandths of the actual crank center to top of the block distance, assuming no tolerance for deck clearance at the top of the piston. I don't have my connecting rod manual or piston catalog handy, but I'll be glad to look those specifications up in a couple of days if you need them.
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.
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Joined: Dec 2008
Posts: 1,839
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panic Offline OP
'Bolter
Yes, please, I'd appreciate any data you have.
Thanks in advance.

panic #494025 Fri Jan 16 2009 05:52 PM
Joined: Dec 2008
Posts: 1,839
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panic Offline OP
'Bolter
....thanks anyway.

panic #494203 Sat Jan 17 2009 01:52 AM
Joined: Feb 2004
Posts: 25,692
H
Kettle Custodian (pot stirrer)
Sorry about the delay- - - - -that's one of the few engines the manual fails to list either rod length or piston specifications. If you can find an automotive machine shop with access to the AERA (Automotive Engine Rebuilders' Association) engine block specification book, the deck height should be in that one. I have a copy of their connecting rod manual, but not the block book.
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!
Joined: Apr 2006
Posts: 160
6
Shop Shark
Panic,
I should be able to find the information for you,if I don't reply please send me a PM to remind me.


In the works 2006 GEN III 6.0 /4L80E/ 205 New process,A/C and power brakes .
61 suburban #495648 Tue Jan 20 2009 11:36 PM
Joined: Apr 2006
Posts: 160
6
Shop Shark
Panic,
I spoke to Dave Haugen at AERA today and he doesn't have the deck height specs.He will search his contacts and see if he can possibly come up with them.You understand the 270 is an inline and not a V-6.I have attached a link with some valuable information on your project .Feel free to contact me with any other engine related questions.
http://www.6066gmcguy.org/EngineData.htm


In the works 2006 GEN III 6.0 /4L80E/ 205 New process,A/C and power brakes .
61 suburban #496010 Wed Jan 21 2009 10:57 PM
Joined: Apr 2006
Posts: 160
6
Shop Shark
The unpublished deck height reported is 11.593 - 11.600 for all V-6 GMC's .I hope this helps


In the works 2006 GEN III 6.0 /4L80E/ 205 New process,A/C and power brakes .
61 suburban #496810 Fri Jan 23 2009 07:22 PM
Joined: Dec 2008
Posts: 1,839
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panic Offline OP
'Bolter
Thanks, but I don't see any commonality in design between the L6 and V6. I know there is a tendency to re-use any tooling and dimensions when re-designing, but there don't appear to be any here.

panic #496856 Fri Jan 23 2009 10:52 PM
Joined: Apr 2006
Posts: 160
6
Shop Shark
You aren't going too when you have V -vs-L6 other than possibly the bore dimension,ring set,rear seal,front seal,lifters and possibly the bearings .You are dealing with 2 different engines.Maybe I don't understand what you are asking ?


In the works 2006 GEN III 6.0 /4L80E/ 205 New process,A/C and power brakes .
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