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Discussion Forum
Show Parts for Model:

Replacement head bolts

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AllisG

09-19-2012 10:51:18
165.139.46.1



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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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NOXJohn

09-20-2012 03:57:23
184.5.164.213



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 Re: Replacement head bolts in reply to AllisG, 09-19-2012 10:51:18  
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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Hobo,NC

09-19-2012 18:48:04
98.17.81.51



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 Re: Replacement head bolts in reply to JMOR, 09-19-2012 10:51:18  
Quoting Removed, click Modern View to see

Are wack a 1/8 off... are use it anywhere but the manifold side of the engine....



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TheOldHokie

09-19-2012 14:11:51
108.8.2.239



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 Re: Replacement head bolts in reply to W_B, 09-19-2012 10:51:18  

AllisG said: (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
This post was edited by TheOldHokie at 14:13:17 09/19/12.

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Dean

09-19-2012 12:43:09
152.216.3.5



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 Re: Replacement head bolts in reply to AllisG, 09-19-2012 10:51:18  
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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soundguy

09-19-2012 11:03:10
184.245.38.51



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 Re: Replacement head bolts in reply to AllisG, 09-19-2012 10:51:18  
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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