Hey again... looking for plugs for 455 iam using auto lite 24 for breakin ..they are taperd seat(Ga) heads when asking what plugs to run I get r44 r45s these are not taperd plugs....what am I missing???crankit...
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The tapered seat plug is incorrect for a G Ga head.

The R 44-55 is a gasketed plug and correct for your head.

 

YIPES!!!! I've been using the wrong plugs!!!! I've been using tapered seat plugs!!! Checkef for damage to plugs or piston and none indicated ....ohhh boy more checking to do
..thx
..cranki

 

I think I'm missing something. When asking what plugs to run & you get r44 r45s, why did you use autolite 24 to begin with?

 

Yep...I figured you were going to say just that.

 

I used them cause iam a cheap bastard(can I print that) had someone give about 20 packs of 8 long time ago....my seats on my heads look like tapered seats ohhh crap ....the engine was running until I ran into carb and spark problems...maybe the plugs were causing all my greif!!! Back to the drawing board??? Thanks for giving me the bad news!!!no really you guys are invaluable...iam glad joe didnt see thisLOL... thnx guys crankit...
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I was going to post an image of a tapered vs. gasket plug & accompanying threaded head style & was late to the game in posting. I should have just posted the link, instead. Glad you figured it out. BTW, I believe the "s" indicates a hotter plug range.

Tapered vs. gasket:
https://www.ngk.com/tapered-vs-gasket-seat

 

Hey cheif...ya I thought its was TS was for tapered seat ....R45TS is heat range of 5 taperd seat 14 mm thread??? Ohh how wrong I was LOL

 

Just read the post on plugs they say the crush washer meets the flat face of the head ....I could swear my seats are tapered!!! I am going to check tommorrow morning !!!! I gotta know....thx

 

The letter "S" in the suffix of an AC spark plug indicates an extended tip.

 

 

TS suffix is tapered seat with extended tip. No second gen Olds V8 factory heads use taper seat plugs.

 

Thnx again joe...I see the chart..
now I have to get the right plug 44 or 45 should do it ...crankit