size of bolt needed to plug head

sheff2720

New Member

Nov 30, 2003

182

0

0

Horsham, PA

Dec 24, 2005

#1

• Dec 24, 2005

• #1

does anyone know the size of the bolt i'll need to plug the smog ports on the back of the heads?

 

Modular2v

Founding Member

Jun 30, 2002

3,222

23

99

oklahoma

Dec 24, 2005

#2

• Dec 24, 2005

• #2

i would like to know the same thing

 

5.02GO

Founding Member

Jun 26, 2001

308

0

16

Ky, Blue Sky Country

Dec 24, 2005

#3

• Dec 24, 2005

• #3

3/4-10 or 5/8-11 cant remember which though.

 

M

mackey

Active Member

Jan 25, 2003

1,284

1

38

Beverly, Massachusetts

Dec 24, 2005

#4

• Dec 24, 2005

• #4

5.02GO said:

3/4-10 or 5/8-11 cant remember which though.

Click to expand...

5/8-11

 

88_GT_5_oh

Sportin' a turbo 5.0 in Canadistan

Jul 4, 2004

1

0

1

WPG/MB/CA

Dec 24, 2005

#5

• Dec 24, 2005

• #5

glad i found this. i gotta remove that last peice of smog crap to run my downpipe for my turbo

 

T

TheUser

Active Member

Jul 25, 2003

1,859

1

36

Springfield, MO

Dec 25, 2005

#6

• Dec 25, 2005

• #6

someone said that a 5.0 spark plug will screw in there, so I guess you could take one of those to the hardware store and match 'em up, but I'd prob. trust mackey w/ his 5/8-11 suggestion

 

M

Morales

New Member

Apr 29, 2005

136

0

0

Miami, FL

Dec 25, 2005

#7

• Dec 25, 2005

• #7

Im assuming this will also be the same bolt needed for a pair of Trickflow TW heads as well? I also need to plug the back of my heads as i removed all that smog nonsense..

thanks

 

T

TheUser

Active Member

Jul 25, 2003

1,859

1

36

Springfield, MO

Dec 25, 2005

#8

• Dec 25, 2005

• #8

Morales said:

Im assuming this will also be the same bolt needed for a pair of Trickflow TW heads as well? I also need to plug the back of my heads as i removed all that smog nonsense..

thanks

Click to expand...

the ports should be same on the Trickflow heads if the heads are expected to bolt up to the stock emissions equipment, which I assume they are.

 

88_GT_5_oh

Sportin' a turbo 5.0 in Canadistan

Jul 4, 2004

1

0

1

WPG/MB/CA

Dec 25, 2005

#9

• Dec 25, 2005

• #9

yes they are the same on the tw heads... thats what i am running. i looked at it and its the samea s stock.

it would make sence that a spark plug would fit cause those are 5/8 arn't they?

 

bobcatv8

Member

Aug 25, 2004

141

1

16

Ocala,FL

Dec 25, 2005

#10

• Dec 25, 2005

• #10

This one might need to be a sticky! It's been asked many times.
It is 5/8-11 thread size.
The hole goes straight through the head front to back. Each exhaust port ties into the passage for the thermactor emissions.
Sometimes the hole on the front of the head is used to mount accessories, if so you will have to use a bushing {that will also serve to plug the hole} that shrinks the thread to 7/16 thread. The Ford part # for this special bushing is
F4ZZ-6E086-A. I have heard it is available from other sources too. If you ever have to swap sides with your heads you will have to be bushed on both front and back of the head IF it is used for an accessory mount. It has been my experience that the rear hole is very carboned up and may have to be cleaned or tapped out on used heads. There isn't much room to manuever against the firewall on a Mustang so check that out too.

 

5.02GO

Founding Member

Jun 26, 2001

308

0

16

Ky, Blue Sky Country

Dec 25, 2005

#11

• Dec 25, 2005

• #11

Spark plug is 1/2-20 i believe

 

TheBocSez

New Member

Feb 3, 2004

652

0

0

Converse, TX

Dec 25, 2005

#12

• Dec 25, 2005

• #12

I was lazy and bought the plugs made by Trick Flow from summit for a couple of bucks each.

 

88_GT_5_oh

Sportin' a turbo 5.0 in Canadistan

Jul 4, 2004

1

0

1

WPG/MB/CA

Dec 25, 2005

#13

• Dec 25, 2005

• #13

TheBocSez said:

I was lazy and bought the plugs made by Trick Flow from summit for a couple of bucks each.

Click to expand...

link or part number? i am placing an order with them anyway.

 

TheBocSez

New Member

Feb 3, 2004

652

0

0

Converse, TX

Dec 26, 2005

#14

• Dec 26, 2005

• #14

part number is TFS-51400265.

Thermactor plug 5/8 - 11

 

795.0pacecar

lover of pudgy polygamists

Jul 11, 2003

480

0

17

Senoia, GA

Dec 27, 2005

#15

• Dec 27, 2005

• #15

I just broke the ceramic ends off of a couple old spark plugs and they threaded right in.