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Re: weird cylinder heads on 440... spark plug won't fit?!?? [Re: joedust451] #1110697
11/11/11 12:27 AM
11/11/11 12:27 AM
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Joplin, MO USA
Robbins Offline
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I have a set of these heads and they are 452... This pix of the peanut style head.....

6913494-IMG_7152.JPG (469 downloads)

Moparlee
Re: weird cylinder heads on 440... spark plug won't fit?!?? [Re: Robbins] #1110698
11/11/11 12:28 AM
11/11/11 12:28 AM
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Joplin, MO USA
Robbins Offline
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Here is the other one with regular style plugs...

6913496-IMG_7153.JPG (345 downloads)

Moparlee
Re: weird cylinder heads on 440... spark plug won't fit?!?? [Re: scratchnfotraction] #1110699
11/11/11 10:57 AM
11/11/11 10:57 AM
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JohnRR Offline
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Quote:

my 77 MH 440 uses a 5/8 hex,tapperd seat,no washer,peanut plug,
autolight 23


looks to me a autolite 23 will screw right in






23, 24 25 , all the same plug , just different heat range .

Re: weird cylinder heads on 440... spark plug won't fit?!?? [Re: joedust451] #1110700
11/11/11 11:03 AM
11/11/11 11:03 AM
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JohnRR Offline
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Quote:

They take the peanut plugs like on the chebbys.

Ok, it just accured to me (but i could be wrong), has anyone looked over there peanut plug 400/440 heads to see if they have these nipples, I'm starting to thing "maybe" they put them there so people would not try to install the old 13/16 plug & have it blow out, its just a thought, but it could be a steam passage.






Never thought of it like that , I thought the thread size of the plug was different but I guess all the plugs are 14mm , except for some fords tha twere 18mm.

Lee , thanks for putting up those pictures , I thought there was a marking that was different between the 2 as an identifier?

scratchy , that plug is 1/8-27NPT , one of the heads I had had that same plug , the other head was NOS. I got them from Paul Rossi back in the 80's , they had big valves and were ported some.

Re: weird cylinder heads on 440... spark plug won't fit?!?? [Re: joedust451] #1110701
11/11/11 12:55 PM
11/11/11 12:55 PM
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Youngsville, NC
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dem440c Offline OP
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Quote:



The earlier ones did, I think by 75-76 all the 440s came with the 5/8 peanut plugs till the end of production.




that would be news to me... I've had several sets of late 70's 452 car heads and never saw this before. I have a 78 440 sitting between the fenders of a 67 NYer in my yard right now, I'll go down and look but I've had that engine in the car for 7 years and it takes the same big 13/16 Champion 12's spark plugs as every other big block I've dealt with. I also had a 77 400 in my truck for about 50k miles, changed the plugs in it more than ones during that time. Both of those engines came from C body cars and I have every reason to believe they were in factory condition when I got them. I have several other 76-78 400's and 440's down in the parts pile, maybe I should do an audit and look for this weirdness.....

Re: weird cylinder heads on 440... spark plug won't fit?!?? [Re: dem440c] #1110702
11/11/11 01:13 PM
11/11/11 01:13 PM
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chicagoland,usa
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Leave it to mopar to change things up a bit. They also had some freak 18 mm plug small block heads, motorhome possibly.

Re: weird cylinder heads on 440... spark plug won't fit?!?? [Re: JohnRR] #1110703
11/11/11 01:39 PM
11/11/11 01:39 PM
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Florida
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scratchy , that plug is 1/8-27NPT , one of the heads I had had that same plug , the other head was NOS. I got them from Paul Rossi back in the 80's , they had big valves and were ported some.




any idea what the plug is there for????

I will try an AR24 plug,didnt know they had a race plug,may be good with the mallory duel points dist I have for mine

looking in the daylight now,I see only the driver side head has the 1/8" plug. and the end core plugs are smaller than what is in the pics posted by Lee.

they have a bigger machined boss area where the 1/8" plug is. both my heads have the bigger machined boss area but only one plug.

I think one could tell the diff in the two 452 castings by the size of the end core plug like was mentioned about the 1 and 2 marks cast on the ends

I would think the peanut plug with extra cooling ports would be more of a MH/HD/truck thing and why some guys have not run across it on all the yrs of working on muscle cars.

now that they have been out of production since 78(80 in the MH/HD chassis) it is showing up more and more as they get saved and transplanted into other projects. and we see just how much odd things/changes come down the line.

again showing "never say never with Ma Mopar"

Re: weird cylinder heads on 440... spark plug won't fit?!?? [Re: dem440c] #1110704
11/11/11 03:24 PM
11/11/11 03:24 PM
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Alaska
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The 440 in my Roadrunner uses the peanut plugs. It's out of a 78 Motorhome with 452 heads

Re: weird cylinder heads on 440... spark plug won't fit?!?? [Re: 73rrak] #1110705
11/11/11 09:08 PM
11/11/11 09:08 PM
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Branson, Mo.
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joedust451 Offline
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If someone has a junk 452 head with the peanut plugs & that boss, may want to take a bit & grind it down just to msee if there is a jacket under it.


75 Duster, 451 10.87 @ 123.58 NA 97 Z28 6sp., 12.01 @ 115 on a 100 shot 71 Swinger. 360 magnum. 12.58 @ 105 78 cutlass, 469 BBC. 12.70 @ 108 on street tires. http://www.youtube.com/watch?v=Z2kqNmMfheU
Re: weird cylinder heads on 440... spark plug won't fit?!?? [Re: dem440c] #1110706
11/11/11 09:16 PM
11/11/11 09:16 PM
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Branson, Mo.
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Quote:

Quote:



The earlier ones did, I think by 75-76 all the 440s came with the 5/8 peanut plugs till the end of production.




that would be news to me... I've had several sets of late 70's 452 car heads and never saw this before. I have a 78 440 sitting between the fenders of a 67 NYer in my yard right now, I'll go down and look but I've had that engine in the car for 7 years and it takes the same big 13/16 Champion 12's spark plugs as every other big block I've dealt with. I also had a 77 400 in my truck for about 50k miles, changed the plugs in it more than ones during that time. Both of those engines came from C body cars and I have every reason to believe they were in factory condition when I got them. I have several other 76-78 400's and 440's down in the parts pile, maybe I should do an audit and look for this weirdness.....




Like i said I "think", but in an earlier post it was shown there were 2 452s, one with the peanuts & one with the earlier style 13/16".


75 Duster, 451 10.87 @ 123.58 NA 97 Z28 6sp., 12.01 @ 115 on a 100 shot 71 Swinger. 360 magnum. 12.58 @ 105 78 cutlass, 469 BBC. 12.70 @ 108 on street tires. http://www.youtube.com/watch?v=Z2kqNmMfheU
Re: weird cylinder heads on 440... spark plug won't fit?!?? [Re: HotRodDave] #1110707
11/11/11 11:06 PM
11/11/11 11:06 PM
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Rome, GA
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Quote:

Quote:

I'm guessing he didn't read the right casting number.




Looks like he read the numbers up-side down




wonder if it has a 710 cap in the left valve cover?

Re: weird cylinder heads on 440... spark plug won't fit?!?? [Re: GTXX] #1110708
11/12/11 12:50 AM
11/12/11 12:50 AM
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Sterling Heights, Michigan 483...
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Quote:

wonder if it has a 710 cap in the left valve cover?





1969 Dodge Super Bee A12 (440 Six Pack, 4-speed, Dana 60 4.10)

1972 Plymouth Road Runner (400, 4-speed, 8.75" 3.23)

1974 Plymouth Duster 360 (360, 4-speed, 8.75" 3.23)
Re: weird cylinder heads on 440... spark plug won't fit?!?? [Re: HotRodDave] #1110709
11/12/11 12:57 AM
11/12/11 12:57 AM
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Western Pa
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Quote:

Quote:

I'm guessing he didn't read the right casting number.




Looks like he read the numbers up-side down




I agree! A quick look or bad lighting would be an easy mistake! Just look at the picture of the head with number above!

Re: weird cylinder heads on 440... spark plug won't fit?!?? [Re: JohnRR] #1110710
11/12/11 02:23 AM
11/12/11 02:23 AM
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Joplin, MO USA
Robbins Offline
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Quote:

Lee , thanks for putting up those pictures , I thought there was a marking that was different between the 2 as an identifier?




I've should of stated that both are 452 heads that I posted pix of. The heads with the big plug came from a 77 400....doesn't mean that they didn't get switched out though.

Last edited by Robbins; 11/12/11 02:25 AM.

Moparlee
Re: weird cylinder heads on 440... spark plug won't fit?!?? [Re: Robbins] #1110711
11/12/11 03:50 PM
11/12/11 03:50 PM
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Holland MI Ottawa
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I HATE IT when people need glasses but ignore it. That was an excellent call that whoever read the #s read them upside down. Corrective lenses will fix that.


Keep old mopars alive.
Re: weird cylinder heads on 440... spark plug won't fit?!?? [Re: 2boltmain] #1110712
11/12/11 05:41 PM
11/12/11 05:41 PM
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Kent, Wa
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Quote:

I HATE IT when people need glasses but ignore it. That was an excellent call that whoever read the #s read them upside down. Corrective lenses will fix that.




Remember the owner of these heads is a Chevy chump.. = no brains


I am truckless..
Re: weird cylinder heads on 440... spark plug won't fit?!?? [Re: 340SHORTY] #1110713
11/12/11 10:49 PM
11/12/11 10:49 PM
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Kansas
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racincuda Offline
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What plugs did he take out of it ?

Re: weird cylinder heads on 440... spark plug won't fit?!?? [Re: racincuda] #1110714
11/13/11 12:13 AM
11/13/11 12:13 AM
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Mt. Vernon, Ohio
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my old 76 winebago had the small taper seat plug's.


Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
Re: weird cylinder heads on 440... spark plug won't fit?!?? [Re: dem440c] #1110715
11/13/11 02:33 AM
11/13/11 02:33 AM
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Brandon, Ms
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i have a '73 440 motor home motor with same heads, i use the autolite AP 26 plugs


Re: weird cylinder heads on 440... spark plug won't fit?!?? [Re: 340SHORTY] #1110716
11/14/11 01:20 PM
11/14/11 01:20 PM
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Youngsville, NC
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dem440c Offline OP
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Quote:

Quote:

I HATE IT when people need glasses but ignore it. That was an excellent call that whoever read the #s read them upside down. Corrective lenses will fix that.




Remember the owner of these heads is a Chevy chump.. = no brains




lol well, in many cases I would agree but in this instance we should give him some credit.... he bought an SRT8 Charger and liked it so much he decided to jump in with both feet and restore a 440 Charger, so at least there's hope for the man!

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