Problem with my gt40 irons and bbk headers.

StreetDreamsGT

New Member

Mar 6, 2003

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New Jersey

Aug 16, 2006

#1

• Aug 16, 2006

• #1

Hey guys I'm just a little confused here, I thought the only problems you have with gt40 heads is the spark plug angle, not the bolt holes lining up. Well the bolt holes don't line up when I have the headers up against the heads, I checked the headers up against a set of 86 heads and the fitment was perfect, what gives? They're not off by much, would it be ok to grind away the little bit i'd need to get them to fit? I've got stage 8 locking header bolts I want to use on them.

 

D

dude5l

Founding Member

Dec 24, 2001

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Grande Prairie, Alberta , Canada

Aug 16, 2006

#2

• Aug 16, 2006

• #2

Are they logtubes or short tubes?

 

StreetDreamsGT

New Member

Mar 6, 2003

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New Jersey

Aug 16, 2006

#3

• Aug 16, 2006

• #3

shorties

 

bock

Founding Member

Jan 7, 2002

648

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Montreal,Qc

Aug 16, 2006

#4

• Aug 16, 2006

• #4

Sure your heads are gt-40 and not gt-40p?
cause the p heads need different headers.

 

L

lang williams

New Member

Jun 11, 2003

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cleveland, oh

Aug 16, 2006

#5

• Aug 16, 2006

• #5

i dont think the header bolt holes change from the e7's to the gt40s or gtp's...i had probs with some mac equal length shorties, they were warped, changed to jba's with the nice flanges an no probs since, the gt p headers are to clear the spark plugs, mainly #7, i'm hoping to avoid this prob with a 90 degree boot an maybe 2 extra header gaskets

 

Vinnietbird

Member

Jun 2, 2005

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19

Aug 16, 2006

#6

• Aug 16, 2006

• #6

My BBK shorties fit both the E-7 and GT-40 heads.

 

fidstang

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Jul 19, 2005

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South Lansing

Aug 16, 2006

#7

• Aug 16, 2006

• #7

make sure your not getting interferance from the mid pipe or cables. Also, run a tap in the header bolt holes to make sure you don't have any debri in the threads causing the bolt to not start threading.

 

mob

the guy who hits on his mom

20+ Year Stangneter

Oct 3, 2003

2,566

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Dallas, TX

Aug 16, 2006

#8

• Aug 16, 2006

• #8

The holes from the e7's, gt40's, and gt40p's are all the same, id guess wrong headers, are you using stock headers? 86 mustangs used e6 heads, not sure if that makes a difference.

 

StreetDreamsGT

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Mar 6, 2003

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New Jersey

Aug 17, 2006

#9

• Aug 17, 2006

• #9

First off I know the only prob is supposed to be with the plugs, second im using an 96 explorer block with aftermarket bbk mustang headers, they match up perfectly to the 86 heads that I have but not to the gt40s. Finally when I tried mounting them it was on an engine stand with nothing in the way so I have no clue what the problem could be.

 

Foxfan88

My Grandpa has great wood.

Sep 13, 2004

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Miami, Ok

Aug 17, 2006

#10

• Aug 17, 2006

• #10

if its only a little off. just grind it away, wont hurt anything

 

Flavadave4

Active Member

Nov 28, 2003

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Utica, NY

Aug 17, 2006

#11

• Aug 17, 2006

• #11

Foxfan88 said:

if its only a little off. just grind it away, wont hurt anything

Click to expand...

x2

 

StreetDreamsGT

New Member

Mar 6, 2003

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New Jersey

Aug 17, 2006

#12

• Aug 17, 2006

• #12

Yea that was what I thought, but what about the header bolts? The heads on the bolts aren't all that big (stage 8 locking header bolts) should I use washers just to make sure everything stays snug?

 

StreetDreamsGT

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Mar 6, 2003

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Aug 17, 2006

#13

• Aug 17, 2006

• #13

bump

 

Hickfied

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Nov 9, 2005

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Morganton, NC

Aug 17, 2006

#14

• Aug 17, 2006

• #14

Got any pics of the header vs head diff.? How much are they off? 1/16", 1/8"?

 

StreetDreamsGT

New Member

Mar 6, 2003

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New Jersey

Aug 17, 2006

#15

• Aug 17, 2006

• #15

I'll see if I can get pix for you, prolly round 1/16

 

2000xp8

SN Certified Technician

Aug 8, 2003

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Aug 17, 2006

#16

• Aug 17, 2006

• #16

IMO, get another set of headers with a full flange, even if you manage to get them on, this isn't the last time they are going to give you problems. You'll be cursing the day you put them on, the first time you need to pull them while in the car. I know from experience, i made a set of mac headers fit, when i should of gotten a better set, and they were a headache for years.

And i think you are confusing everyone a bit. If it's an explorer long block, you have gt40p heads, not gt40 irons. Yes they are iron, but the gt40 irons are known as the ones off of a 93/94/95 cobra.

 

StreetDreamsGT

New Member

Mar 6, 2003

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New Jersey

Aug 18, 2006

#17

• Aug 18, 2006

• #17

9t40 Irons came on the 96 explorers also though. If anyone wants proof i'll show you where it's stamped GT instead of GTP. Trust me, I researched this because I already had my headers and I wanted to have heads that they would fit on.

 

2000xp8

SN Certified Technician

Aug 8, 2003

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NJ

Aug 18, 2006

#18

• Aug 18, 2006

• #18

You are right, i forgot about the 96's.