348 Spark Plugs

[Bobaloo]

Does the early 1958 348's use a different plug with a different length than later 1958 348 heads? My friend thinks he has the later version with cooling, but the Autolite 64 plugs look like they will hit the piston compared to the old plugs that were in the engine???

[W Head]

58 heads without the cooling does not take the extended reach plug. I think it calls for a AC 43, 44 or 45 plug. Somebody correct me if I am wrong.

W Head

59 El Camino 348-3,2s
59 Impala 409-2,4s

[Bobaloo]

Every source I have found lists the AC44 as the plug, but that crosses these days to an extended reach plug. the old ones in the motor when he bought it had threads of about 1/2" or less. His must be early heads.

[Ronnie Russell]

Incorrect Bob,,,,,,, 44 is not an 3/4 reach plug. 44 N or 44 XLS is long plug. Use R44S or R45S for the early 58 head.

[Bobaloo]

Thank you Ronnie,

gol danged new fangled suffix's.....&*^%@*+^%$

[skipxt4]

Thank you Ronnie,

gol danged new fangled suffix's.....&*^%@*+^%$

Hey Bob: I was working on my car yesterday, and became so frustrated, that I blurted out the same dirty word. What does it mean?:dunno It must be bad, because my wife slapped me in the face.:mad: :rofl :rofl :rofl Skip:)

[tripowerguy]

If you use the 3/4 in. reach plugs in the early heads they may not hit the pistons but the threads will carbon up and you will have a hard time getting them out and may take the threads out.:eek: Roy

[59wright]

I can't find ac 44 plugs anywhere . what is the new equivilent? thanks

[Ronnie Russell]

R44 , but you probably won't find those either. Use R44S S for extended tip. Will work fine. I assume you know those are for early 58 heads only. Use R44XLS for late 58 and later.

[59wright]

I do not have the early style heads. but I am still confussed about what plugs to use

[Ronnie Russell]

R 44 XLS is the correct plug

[59wright]

thank you for all your help

[Bobaloo]

Turns out he has the 2791 - early heads.
Thanks for all the plug info. You folks are a veritable fountain of knowledge and other matter.

[blumun53]

Rumor has it that if you use Autolite (Ford) spark plugs in a W-motor, that the car will come to life on its own in the middle of the night and start running amok through town and hurting people, and making the power lines short out and make the strangest sounds you've ever heard as it streaks through the countryside devouring everything in its path, while the hood and deck lid open and close on their own and a weird glow eminates from inside the car while the radio plays Liza Minelli at ear-piercing volume and will not come to rest until dawn the next day. Like I said it's mainly just a rumor.

[rstreet]

Rumor has it that if you use Autolite (Ford) spark plugs in a W-motor, that the car will come to life on its own in the middle of the night and start running amok through town and hurting people, and making the power lines short out and make the strangest sounds you've ever heard as it streaks through the countryside devouring everything in its path, while the hood and deck lid open and close on their own and a weird glow eminates from inside the car while the radio plays Liza Minelli at ear-piercing volume and will not come to rest until dawn the next day. Like I said it's mainly just a rumor.

Glad my 61 has AC's I don't need those problems:D
Robert

[models916]

Ford sold Autolite to Bendix a long long long time ago. Ford stuff is Motorcraft.

[Bobaloo]

Lordie, I can only imagaine if you used NGK's what would happen.