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Ford Tractors Discussion Forum
:

What is the torque for head bolts for

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RLP in Co.

08-03-2020 12:46:15




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For a 1978 Ford 550 backhoe. I looked on the internet and one says 101 and another says 110.




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Sean in PA

08-04-2020 03:18:53




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 Re: What is the torque for head bolts for in reply to RLP in Co., 08-03-2020 12:46:15  
If you don't have a service manual you should get one. The I&T aftermarket manual is usually around $30.00 on lots of places on the internet. There's tons of valuable information.
For instance, it also gives specifics about the order that you tighten the bolts, starting with the pair in the center and then moving to the next ones forward from center and then the next pair toward the rear from center, then alternating to the next pair forward, the next pair rearward, etc. until all of them are tightened to the specified torque, do that 3 times for the 3 passes to the different torque ranges listed.

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Sean in PA

08-03-2020 13:45:51




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 Re: What is the torque for head bolts for in reply to RLP in Co., 08-03-2020 12:46:15  
The 550 had the same 201 engine as the 4600 and the 3 cylinder 4000 before it. My manual for the 65-75 4000 (and all 65-75 3 cylinder engines) says it should be done in 3 steps:
First step is all bolts to 50-60 Ft.-Lbs.

Second step is all bolts to 80-90 Ft.-Lbs.

Third step is all bolts to 105-115 Ft.-Lbs.

Also says "Note: Torque values are given for lubricated threads. Tighten cylinder head bolts only when engine is cold."

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RLP in Co.

08-03-2020 16:52:06




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 Re: What is the torque for head bolts for in reply to Sean in PA, 08-03-2020 13:45:51  
Thanks a lot!



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Destroked 450

08-03-2020 13:07:10




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 Re: What is the torque for head bolts for in reply to RLP in Co., 08-03-2020 12:46:15  
My factory service manual calls for 110 lbs



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RLP in Co.

08-03-2020 17:00:44




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 Re: What is the torque for head bolts for in reply to Destroked 450, 08-03-2020 13:07:10  
I appreciate that very much!



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