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Head bolt replacment

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Author  [Modern View]

05-22-2018 12:14:44

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Hi, I have an 861 gas with the head currently off for valve work. Do I need to replace the head bolts with new ones for reassembly? I heard they can stretch or snap, and is best to use new ones. New Holland prices them at $24 each! I have not found another source for the head bolts so if someone knows of another source, if I were to need them, it would be much appreciated.


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05-23-2018 08:51:35

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 Re: Head bolt replacment in reply to FarmerBlair, 05-22-2018 12:14:44  
Thanks all for the info.

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05-22-2018 18:14:06

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 Re: Head bolt replacment in reply to FarmerBlair, 05-22-2018 12:14:44  
You're not building an Indy engine.

Just about everyone reuses the head and even rod bolts.


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Mike Groom

05-22-2018 14:38:05

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 Re: Head bolt replacment in reply to FarmerBlair, 05-22-2018 12:14:44  
I always reuse the head bolts,I think the newer engines with the stretch type bolts always use new ones,I have rebuilt dozens of older auto and tractor engines and have always used the old head bolts,just chase the threads and lightly oil.

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05-22-2018 12:26:02

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 Re: Head bolt replacment in reply to FarmerBlair, 05-22-2018 12:14:44  
I have always reused the head bolts on the 172; 2x on one engine. Chase with a tap, lightly oil. Take up in 2 stages. Retorque after you run and check valve clearance.

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William Fissell

05-22-2018 17:16:24

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 Re: Head bolt replacment in reply to ernied, 05-22-2018 12:26:02  
agree with the others.

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