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Head gasket bore, vs. Cylinder wall bore
#2897345
03/09/21 11:57 AM
03/09/21 11:57 AM
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Joined: Jan 2003
Posts: 10,091 MN
JERICOGTX
OP
I Live Here
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OP
I Live Here
Joined: Jan 2003
Posts: 10,091
MN
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Looking at gaskets for my INDY aluminum block, and Cometic makes a 4.530 bore gasket, and my block is 4.524. Is this too close to use? Should I use a bigger bore gasket? Never had a gasket that close to the cylinder wall before.
69 GTX
68 Road Runner
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Re: Head gasket bore, vs. Cylinder wall bore
[Re: cl440]
#2897415
03/09/21 03:49 PM
03/09/21 03:49 PM
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Joined: Aug 2003
Posts: 43,719 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,719
Bend,OR USA
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May want to consider a gasket with a larger bore. I would use a 4.550 bore size gaskets
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Head gasket bore, vs. Cylinder wall bore
[Re: Cab_Burge]
#2897434
03/09/21 04:44 PM
03/09/21 04:44 PM
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Joined: Jan 2012
Posts: 2,726 Stuttgart, Arkansas
rickseeman
master
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master
Joined: Jan 2012
Posts: 2,726
Stuttgart, Arkansas
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May want to consider a gasket with a larger bore. I would use a 4.550 bore size gaskets I agree with Cab. I think Cometic told me .015"-.030" back from the bore.
2011 Drag Pak Challenger
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Re: Head gasket bore, vs. Cylinder wall bore
[Re: rickseeman]
#2897437
03/09/21 04:55 PM
03/09/21 04:55 PM
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Joined: Jan 2003
Posts: 13,492 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,492
Marion, South Carolina [><]
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May want to consider a gasket with a larger bore. I would use a 4.550 bore size gaskets I agree with Cab. I think Cometic told me .015"-.030" back from the bore. .030" larger bore is what I've always heard recommended.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 4 speed, Dana 60 '71 Demon 340, no drivetrain, on blocks behind the barn '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: Head gasket bore, vs. Cylinder wall bore
[Re: an8sec70cuda]
#2897583
03/09/21 11:27 PM
03/09/21 11:27 PM
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Joined: Feb 2006
Posts: 476 Alberta, Canada
451Guy
mopar
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mopar
Joined: Feb 2006
Posts: 476
Alberta, Canada
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Its funny. The Felpro 1009 is advertised at 4.410 but the fire ring is almost in the bore of my 4.375 motor! Always Check!
Thanx 451 Guy
512 cu in 71 Demon Super Street Car - NO LONGER - Broke Crank Best ET 9.57 @ 139.96
451 cu in Pump Gas - 71 Demon Super Street Car Best ET 9.99 @ 136.80
512 cu in 69 Charger R/T Best ET 11.39 @ 118.11
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