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header bolt [message #245130]

Wed, 26 March 2014 06:05

appie

Messages: 902
Registered: April 2013
Location: denmark

Karma: 2

Senior Member

Anybody has the correct lenght for headerbolts to fit the Thorley header

Appie eleganza 76 "Olga" now sadly sold 6 wheel discbrake Quadrabags Springfield stage 2 462 olds Manny tranny ( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html Fulltiming in Europe july 2014 til july 2016 Denmark

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Re: [GMCnet] header bolt [message #245154 is a reply to message #245130]

Wed, 26 March 2014 10:19

James Hupy

Messages: 6806
Registered: May 2010

Karma: -62

Senior Member

Lenze, measure the flange and gasket thickness, then use a Phillips
screwdriver to probe the threaded hole. Subtract a couple of threads, and
there you go.
Jim Hupy
Salem, Or.
78 GMC Royale 403
On Mar 26, 2014 4:05 AM, "lenze middelberg" <lenze@middelberg.dk> wrote:

>
>
> Anybody has the correct lenght for headerbolts to fit the Thorley header
> --
> Appie
> eleganza 76 "Olga" ( pictures at
> http://www.gmcmhphotos.com/photos/g6489-olga.html
> Volvo v70
> Denmark
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Re: [GMCnet] header bolt [message #245163 is a reply to message #245154]

Wed, 26 March 2014 11:08

appie

Messages: 902
Registered: April 2013
Location: denmark

Karma: 2

Senior Member

I could do that if the headers were off, they are'nt And wont be until we take the engine out ( she can still run) I just want new bolts ready for the new engine

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Re: [GMCnet] header bolt [message #245174 is a reply to message #245163]

Wed, 26 March 2014 11:43

mikethebike

Messages: 331
Registered: January 2014

Karma: 0

Senior Member

Why not just wait until you pull the engine? Most header bolts are a standard length. Personally, I prefer bronze studs with single use locking nuts of the type that were on the Eagle Talon AWD Turbo I had back in the mid 90's. They don't rust, corrode or otherwise seize. With the single use nuts they don't back out. I made studs from bronze bolts for the 65 Mustang headers and flanges. Not dealing ever again with rusted shut exhaust fasteners.

appie wrote on Wed, 26 March 2014 11:08

I could do that if the headers were off, they are'nt And wont be until we take the engine out ( she can still run) I just want new bolts ready for the new engine

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Re: [GMCnet] header bolt [message #245177 is a reply to message #245174]

Wed, 26 March 2014 11:59

appie

Messages: 902
Registered: April 2013
Location: denmark

Karma: 2

Senior Member

You lucky people who can just go to the cornershop and buy your parts
It is not so easy living in denmark
I have to make sure I have all parts ready when we start working on the engine otherwise I can use days or more finding the right parts while Olga is in pieces in the shop that will charge me everyday she is there

So if anybody knows the length of the bolts I can order the bolts I like best, thank you

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Re: [GMCnet] header bolt [message #245178 is a reply to message #245177]

Wed, 26 March 2014 12:04

Loffen

Messages: 1087
Registered: August 2013
Location: Norway

Karma: 1

Senior Member

Appie, give me the thiknes of the header flange and I can messure for you, I have my manifolds out.

1973 23' # 1848 Sky Blue Glacier called Baby Blue and a 1973 26'-3 # 1460 Parrot green Seqouia Known as the Big Green, And sold my 1973 26'-2 # 581 White Canyon lands under the name Dobbelt trøbbel in Norway

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Re: [GMCnet] header bolt [message #245180 is a reply to message #245178]

Wed, 26 March 2014 12:08

appie

Messages: 902
Registered: April 2013
Location: denmark

Karma: 2

Senior Member

Thanks Espen

If you just give me the depth of the thread I can add the flange and gasket myselv

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Re: [GMCnet] header bolt [message #245181 is a reply to message #245180]

Wed, 26 March 2014 12:10

Loffen

Messages: 1087
Registered: August 2013
Location: Norway

Karma: 1

Senior Member

The one in the middle is the most shallow one and I get just under 25mm, the outside ones are around 30-35mm and the two last ones even more, all of them are different.

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Re: [GMCnet] header bolt [message #245183 is a reply to message #245181]

Wed, 26 March 2014 12:14

appie

Messages: 902
Registered: April 2013
Location: denmark

Karma: 2

Senior Member

That was quick! thanks

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Re: [GMCnet] header bolt [message #245184 is a reply to message #245183]

Wed, 26 March 2014 12:16

Loffen

Messages: 1087
Registered: August 2013
Location: Norway

Karma: 1

Senior Member

Working on DT now and have a PC in my workshop, no problem Smile

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Re: header bolt [message #245185 is a reply to message #245130]

Wed, 26 March 2014 12:17

John T.

Messages: 39
Registered: February 2014
Location: Houston Tex.

Karma: 0

Member

Your in luck! I just happen to get a new set from Gerry ( great guy) while I made a pass in Montgomery for the first time(without my coach). What i was able to measure was just 1 inch of threads with a 9/16 hat (or washer).

John T. Humble Texas. '77 Eleganza II? '74 Sequioa (Parts coach)

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Re: header bolt [message #245188 is a reply to message #245130]

Wed, 26 March 2014 12:20

John T.

Messages: 39
Registered: February 2014
Location: Houston Tex.

Karma: 0

Member

Wow! forgot my metric mic at the store. Smile

John T. Humble Texas. '77 Eleganza II? '74 Sequioa (Parts coach)

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Re: header bolt [message #245190 is a reply to message #245188]

Wed, 26 March 2014 12:35

appie

Messages: 902
Registered: April 2013
Location: denmark

Karma: 2

Senior Member

Thanks to you too John " will be fine My iphone make instant translations
Will have to order in " also

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Re: header bolt [message #245191 is a reply to message #245130]

Wed, 26 March 2014 12:40

John T.

Messages: 39
Registered: February 2014
Location: Houston Tex.

Karma: 0

Member

By the way the parts I had recived were in a sealed bag just like you would get if purchased new and I have just one size (lenghth) bolts for the header flange. Hope I helped Very Happy

John T. Humble Texas. '77 Eleganza II? '74 Sequioa (Parts coach)

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Re: [GMCnet] header bolt [message #245192 is a reply to message #245177]

Wed, 26 March 2014 12:40

Jp Benson

Messages: 649
Registered: October 2011
Location: Fla

Karma: 2

Senior Member

The bolts that came with my Thorleys are 3/8' x 1" grade 5, coarse
thread. It has a flange head and takes a 7/16 wrench.

Looks like these...

http://www.mcmaster.com/#standard-cap-screws/=r9i9gn

JP

On 3/26/2014 12:59 PM, lenze middelberg wrote:
>
> You lucky people who can just go to the cornershop and buy your parts
> It is not so easy living in denmark
> I have to make sure I have all parts ready when we start working on the engine otherwise I can use days or more finding the right parts while Olga is in pieces in the shop that will charge me everyday she is there
>
> So if anybody knows the length of the bolts I can order the bolts I like best, thank you

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