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11-21-2019, 09:29 AM | #1 |
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Join Date: Mar 2014
Location: Jacksonville FL
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Correct Head torque
IS my memory correct on 55lb's is the head nut torque for the flathead??? OR is it 65lbs (hence the reason for the post)
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11-21-2019, 09:34 AM | #2 |
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Location: Oshkosh, Wi
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Re: Correct Head torque
I use 45 lb ft.
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11-21-2019, 11:08 AM | #3 |
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Re: Correct Head torque
The 1935 to 48 MOTORS MANUAL says on page 437 the following:
cast iron heads 50 to60 ft.lbs, aluminum heads 35 to 40 ft. lbs. The 49-51 Mercury Manual says: 65-70 foot pounds. I would assume 49-53 Ford would be the same. |
11-21-2019, 11:12 AM | #4 |
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Re: Correct Head torque
I torque all my heads to 45 ft/lbs for 3 heat cycles Don't break and retorque. I use bolts most of the time and use a sealant on the threads.
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11-21-2019, 02:50 PM | #5 |
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Re: Correct Head torque
The Truck manual for 48-52 8BA/8RT says to go 65-70. FelPro says the same for their PermaTorque gaskets.
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11-21-2019, 03:12 PM | #6 |
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Re: Correct Head torque
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11-21-2019, 04:02 PM | #7 |
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Re: Correct Head torque
Thanks for everyone's input, I'll follow Flatjack9 & Ol Ron's input and do the 45 with the 3 heat cycles, its for just ONE nut as I removed to clean and lube the ground strap!!! Thanks again.
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11-24-2019, 08:48 AM | #8 |
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Re: Correct Head torque
Not meaning to steal thread but recently installed the right bank head on an 8BA. Thought about the sealant hardening & Ole Ron’s instructions to torque then heat cycle 3 times & retorque. I used the Permatex w PFTE & couldn’t see any indication of whether it was the hardening type or not. If hardening type would retorque break water seals & torqued head bolt threads?w
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11-24-2019, 09:19 AM | #9 |
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Re: Correct Head torque
I use 40 on 33-34 aluminum heads .
Had a weeping head gasket years ago and attempted to fix it by going to 60 . Got to remove the heads to replace some stripped studs . Won't do that again . |
11-24-2019, 10:14 AM | #10 |
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Re: Correct Head torque
What you used is non-hardening.
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11-24-2019, 10:20 AM | #11 |
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Re: Correct Head torque
flatjack's correct...the sealer you used doesn't completely harden and will be fine for retorque. I use it every day (I rebuild diesel engines) for both oil and water thread sealing and it is very good. Terry
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"It don't take but country smarts to solve the problem" (Smokey Yunick) '41 Merc Town Sedan / 260" 8CM engine '66 Fairlane four door / "warmed up" 302 |
11-24-2019, 11:18 AM | #12 |
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Re: Correct Head torque
Thx Flatjack9 & Terry, again sorry to change direction of thread
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Nomad |
11-24-2019, 01:28 PM | #13 |
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Re: Correct Head torque
The Nut's Behind the Wheel!
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11-24-2019, 03:27 PM | #14 |
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Re: Correct Head torque
I’ve had a loose nut behind the controls for years, can’t figure out how to fix it,
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Nomad Last edited by AnthonyG; 11-25-2019 at 10:32 AM. Reason: Fat fingers |
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