|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
05-05-2024, 03:40 PM | #1 |
Senior Member
Join Date: Aug 2012
Location: Texas
Posts: 248
|
oversize head gasket
My extra block that has all machine work done is bored .080 oversize. I bought the copper head gasket and it barely fits over the bore of each cylinder. I mean the openings are almost line to line fit if not an exact size as the bore. I haven't installed the pistons to see if they are down in the bore any at all. Should I try to find a different head gasket that has more bore opening?
Ed |
05-05-2024, 05:25 PM | #2 |
Senior Member
Join Date: Mar 2012
Location: Ohio
Posts: 2,028
|
Re: oversize head gasket
Isn't 0,080 just barely over 1/16th of an inch? So on each side even half of that???
|
Sponsored Links (Register now to hide all advertisements) |
|
05-05-2024, 08:05 PM | #3 |
BANNED
Join Date: May 2010
Location: Wa.
Posts: 5,423
|
Re: oversize head gasket
I forget the part number but the copper gaskets I got (from NAPA) measure 4.125 center to center on the fire ring.
Two of my engines were 4.040 bore. Worked fine with offset bores. |
05-05-2024, 10:29 PM | #4 |
Senior Member
Join Date: Aug 2012
Location: Texas
Posts: 248
|
Re: oversize head gasket
|
05-06-2024, 08:45 AM | #5 |
Senior Member
Join Date: May 2010
Location: Long Island, NY
Posts: 3,518
|
Re: oversize head gasket
My understanding is that the copper head gasket available now fits up to an 0.125 oversize cylinder bore. Maybe this is not / no longer the case?
The weakness in a big bore gasket is the minimal material between the cylinders. In my opinion, the big bore gasket contributes to the common burn-through between Cylinders 3 & 4.
__________________
Bob Bidonde |
05-06-2024, 09:13 AM | #6 | |
Senior Member
Join Date: Aug 2012
Location: Texas
Posts: 248
|
Re: oversize head gasket
Sponsored Links (Register now to hide all advertisements)
Quote:
Ed |
|
05-06-2024, 09:31 AM | #7 |
Senior Member
Join Date: Apr 2018
Location: Mebane NC
Posts: 2,398
|
Re: oversize head gasket
Best 509G works just fine on my .100 over, and my pistons go above the deck.
|
05-06-2024, 10:24 AM | #8 |
Senior Member
Join Date: May 2010
Location: So Cal
Posts: 8,802
|
Re: oversize head gasket
The link to Vince's site shows the bore size of the different gaskets.
https://www.fordgarage.com/pages/ABc...asketguide.htm |
05-08-2024, 05:21 AM | #9 |
Member
Join Date: Apr 2014
Location: Worcester, MA
Posts: 50
|
Re: oversize head gasket
Best composite gasket on mine. .125 over
|
05-08-2024, 10:28 PM | #10 |
Senior Member
Join Date: Jan 2020
Location: SF Bay Area
Posts: 1,154
|
Re: oversize head gasket
My engine is 0.080” over, I use the Best 509G and am very happy with it.
__________________
JayJay San Francisco Bay Area ------------------------ 1930 Murray Town Sedan 1931 Briggs S/W Town Sedan |
|
|
Sponsored Links (Register now to hide all advertisements) |
|