wtf? spark plugs dont fit

carbed87

Member

Jun 5, 2005

215

0

16

Sep 6, 2005

#1

• Sep 6, 2005

• #1

a while after i put my cast iron gt-40's on, i tried to swap out the plugs (the ones that came with the heads were painted over) ehan i did, the plugs out of my stocks straight up wont thread in there too big it looks like ..... WTF


ANY ONE HAVE ANY BRIGHT IDEAS? (sorry, always wanted to say that, but really)

 

ECU5.0

Banned

Jan 10, 2004

1,803

1

0

raleigh, nc

Sep 6, 2005

#2

• Sep 6, 2005

• #2

what number plug are you using?

 

txstang84

15 Year Member

May 21, 2005

1,639

42

69

Tuscola, tx

Sep 6, 2005

#3

• Sep 6, 2005

• #3

i just looked on autozone's website, they said use autolite 764, or motorcraft 434...that sound right guys?

 

C

cwdunnet

New Member

Aug 12, 2005

30

0

0

toronto

Sep 6, 2005

#4

• Sep 6, 2005

• #4

the spark plugs out of the stock 5.0 heads(e7te's) and the spark plugs out of case iron gt40's are not the same. i noticed that when i switched to gt40 cast irons. i had the auto-lite plugs in mine with stock e7te's they were 25's..and the gt40 cast iron's had to take 764s in autolite. so if u use the autolites get 764's for your gt40's or if u use different brand just cross ref them.

 

J

JB66

New Member

Aug 21, 2004

565

1

0

New York

Sep 6, 2005

#5

• Sep 6, 2005

• #5

Look under the valve cover and get the casting # off the heads. Did you mean the plug diameter was too large?

 

carbed87

Member

Jun 5, 2005

215

0

16

Sep 6, 2005

#6

• Sep 6, 2005

• #6

thanks alot guys, i knew somethin was up with that

 

Funanin

Founding Member

Nov 26, 2001

356

0

0

Horsham, Pennsylvania

Sep 7, 2005

#7

• Sep 7, 2005

• #7

not sure if this will help but my aluminum GT40s take motorcraft plug AGSF-32C