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Freeze/Frost/Expansion Plug sizes?
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Logistics Pro
Joined: May 2010
Posts: 4,436
Likes: 19
From: Regina, Saskatchewan
Freeze/Frost/Expansion Plug sizes?
Hey fellas,
Looking for some info on the 400 freeze/frost/expansion plug size.
What's the specs on the OEM size?
If you look on RockAuto or Summit, there's a ton of different sizes and it's hard to tell which is the correct ones.
1979 FORD F-250 6.6L 400cid V8 Expansion Plug / Set | RockAuto
Check out the above link. They list the following sizes....
Open End Dia.: 1.510"
Open End Dia.: 1.513"
Open End Dia.: 1.577"
Open End Dia.: 1.580"
There's 4 different sizes???? Some of them list "deep", "shallow", "oversize by X".... what the heck is the benefit of each and why are there so many options???
This is the kit I'm likely to order, but want to make sure it's the correct one!
MELLING MPE109BR
I'm trying to do a refresh on my motor - see the pics below of the passenger side expansion plugs. You'll see why I'm asking all these questions.
Lovely lovely leaks at the expansion/freeze/frost plug. Passenger side.
Looking for some info on the 400 freeze/frost/expansion plug size.
What's the specs on the OEM size?
If you look on RockAuto or Summit, there's a ton of different sizes and it's hard to tell which is the correct ones.
1979 FORD F-250 6.6L 400cid V8 Expansion Plug / Set | RockAuto
Check out the above link. They list the following sizes....
Open End Dia.: 1.510"
Open End Dia.: 1.513"
Open End Dia.: 1.577"
Open End Dia.: 1.580"
There's 4 different sizes???? Some of them list "deep", "shallow", "oversize by X".... what the heck is the benefit of each and why are there so many options???
This is the kit I'm likely to order, but want to make sure it's the correct one!
MELLING MPE109BR
I'm trying to do a refresh on my motor - see the pics below of the passenger side expansion plugs. You'll see why I'm asking all these questions.
Lovely lovely leaks at the expansion/freeze/frost plug. Passenger side.
FTE Legend
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
Interesting question. My spare 400 block's openings measure 1.560 as best I can measure them with expansion plugs in there. Oddly enough, the plugs are Dorman 555-027's, and their site says they are the wrong plug.
So, I created a page on my web site to answer this question: 351M and 400 - ???Gary's Garagemahal. But, what you can't tell from the illustration is what the generic part number for a soft plug is. Turns out it is 6026, and on the Part Numbers tab you can see that the plug is supposed to be 1.50" in diameter.
So, I created a page on my web site to answer this question: 351M and 400 - ???Gary's Garagemahal. But, what you can't tell from the illustration is what the generic part number for a soft plug is. Turns out it is 6026, and on the Part Numbers tab you can see that the plug is supposed to be 1.50" in diameter.
Ford Parts Specialist
Joined: Nov 2006
Posts: 88,826
Likes: 783
From: Simi Valley, CA
6) D7AZ-6026-A (replaced C8AZ-6026-C) .. Core Plug (cup type) - 1.50" O.D.
1962/63 221; 1962/65 260; 1963/68 289; 1968/96 302; 1969/97 351W; 1970/74 351C; 1971/82 400; 1975/82 351M
-------------------------------------------------------------------------------------------------------------------------------------
C8AZ-6026-D .. Core Plug - .060" O/S (oversize).
Same applications as above.
1962/63 221; 1962/65 260; 1963/68 289; 1968/96 302; 1969/97 351W; 1970/74 351C; 1971/82 400; 1975/82 351M
-------------------------------------------------------------------------------------------------------------------------------------
C8AZ-6026-D .. Core Plug - .060" O/S (oversize).
Same applications as above.
Laughing Gas
Joined: Feb 2003
Posts: 1,234
Likes: 3
From: In the woods of Oregon
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Thread Starter
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Logistics Pro
Joined: May 2010
Posts: 4,436
Likes: 19
From: Regina, Saskatchewan
Interesting question. My spare 400 block's openings measure 1.560 as best I can measure them with expansion plugs in there. Oddly enough, the plugs are Dorman 555-027's, and their site says they are the wrong plug.
So, I created a page on my web site to answer this question: 351M and 400 - ???Gary's Garagemahal. But, what you can't tell from the illustration is what the generic part number for a soft plug is. Turns out it is 6026, and on the Part Numbers tab you can see that the plug is supposed to be 1.50" in diameter.
So, I created a page on my web site to answer this question: 351M and 400 - ???Gary's Garagemahal. But, what you can't tell from the illustration is what the generic part number for a soft plug is. Turns out it is 6026, and on the Part Numbers tab you can see that the plug is supposed to be 1.50" in diameter.
6) D7AZ-6026-A (replaced C8AZ-6026-C) .. Core Plug (cup type) - 1.50" O.D.
1962/63 221; 1962/65 260; 1963/68 289; 1968/96 302; 1969/97 351W; 1970/74 351C; 1971/82 400; 1975/82 351M
-------------------------------------------------------------------------------------------------------------------------------------
C8AZ-6026-D .. Core Plug - .060" O/S (oversize).
Same applications as above.
1962/63 221; 1962/65 260; 1963/68 289; 1968/96 302; 1969/97 351W; 1970/74 351C; 1971/82 400; 1975/82 351M
-------------------------------------------------------------------------------------------------------------------------------------
C8AZ-6026-D .. Core Plug - .060" O/S (oversize).
Same applications as above.
I'm starting to get attached to mine
Every time someone tells me to "swap it for a 460", it just makes me want to keep it even more than I already do!
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