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Replacement head bolts


 
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AllisG
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Joined: 26 Jun 2011
Posts: 168
Location: north west,Indiana

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PostPosted: Wed Sep 19, 2012 9:51 am    Post subject: Replacement head bolts Reply to specific post Reply with quote

Puting new pistons and crank in a ford 8n and I did this at my local high school and somebody stole 1 of the head bolts for the engine. But just 1 probly throw it across our shop at somebody... As for the question Is the bolts used to hold the head on a certain grade or a special bolt or can i go to the local true value and pick up a simple bulk bolt and put in the engine?
 
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souNdguy
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Joined: 20 Aug 2002
Posts: 54215


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PostPosted: Wed Sep 19, 2012 10:03 am    Post subject: Re: Replacement head bolts Reply to specific post Reply with quote

gr8 or 10 is what I would use.. might have had a 5 in it before.. but i'd go 8 min
 
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Dean
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Joined: 29 Jan 1998
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PostPosted: Wed Sep 19, 2012 11:43 am    Post subject: Re: Replacement head bolts Reply to specific post Reply with quote

If you want your replacement head bolt to be identical to the OEM bolts, you will need to get an OEM bolt at a salvage yard, as the OEM bolts are not standard.

Dean
 
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TheOldHokie
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Joined: 08 Apr 2005
Posts: 7152
Location: Myersville, MD

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PostPosted: Wed Sep 19, 2012 1:11 pm    Post subject: Re: Replacement head bolts Reply to specific post Reply with quote

AllisG wrote:
(quoted from post at 13:51:18 09/19/12) Puting new pistons and crank in a ford 8n and I did this at my local high school and somebody stole 1 of the head bolts for the engine. But just 1 probly throw it across our shop at somebody... As for the question Is the bolts used to hold the head on a certain grade or a special bolt or can i go to the local true value and pick up a simple bulk bolt and put in the engine?


The OEM bolts are 7/16-14 x 2-3/8" long. A common 7/16-14 x 2-1/2" grade 8 cap screw will work just fine. Because it is slightly longer make sure it is used in one of the holes that go through into the water jacket.

TOH
 


Last edited by TheOldHokie on Wed Sep 19, 2012 1:13 pm; edited 1 time in total
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Hobo,NC
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Joined: 14 Jun 2007
Posts: 12305


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PostPosted: Wed Sep 19, 2012 5:48 pm    Post subject: Re: Replacement head bolts Reply to specific post Reply with quote

TheOldHokie wrote:
(quoted from post at 01:11:51 09/20/12)
AllisG wrote:
(quoted from post at 13:51:18 09/19/12) Puting new pistons and crank in a ford 8n and I did this at my local high school and somebody stole 1 of the head bolts for the engine. But just 1 probly throw it across our shop at somebody... As for the question Is the bolts used to hold the head on a certain grade or a special bolt or can i go to the local true value and pick up a simple bulk bolt and put in the engine?


The OEM bolts are 7/16-14 x 2-3/8" long. A common 7/16-14 x 2-1/2" grade 8 cap screw will work just fine. Because it is slightly longer make sure it is used in one of the holes that go through into the water jacket.

TOH


Are wack a 1/8 off... are use it anywhere but the manifold side of the engine....
 
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NOXJohn
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Joined: 22 Apr 2008
Posts: 1439


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PostPosted: Thu Sep 20, 2012 2:57 am    Post subject: Re: Replacement head bolts Reply to specific post Reply with quote

I purchased replacement head bolts from Fastenal. They were 7/16"-14X2&1/2" yellow zinc finish SAE j429 Grade 8 Hex Cap Screws Part#0115163. The was cost $0.896/each. All the head bolt holes were open into the water jacket in the three 8Ns I have rebuilt. If any hole looks blocked dig around and see if it is not just years of corrosion. I used a washer only because the head on the new bolt was not as big as the original and I liked the look. The washer from Fastenal was a 7/16" yellow zinc finish SAE Tru-Hardened flat washer Part# 1133816. The cost was $0.1912/each. I used Teflon paste seal on all bolts. I did not cut anything off any of the bolts.
 
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