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Old 09-28-2019, 11:24 AM   #1
Redbird
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Default Exhaust manifold torque spec

I am replacing the exhaust manifold gasket. What is the torque spec?
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Old 09-28-2019, 11:41 AM   #2
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Default Re: Exhaust manifold torque spec

The book says 45 ft #, but I don’t go quite that high.
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Old 09-28-2019, 12:17 PM   #3
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Default Re: Exhaust manifold torque spec

Thank you!
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Old 09-28-2019, 12:26 PM   #4
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Default Re: Exhaust manifold torque spec

If you use the brass hexa, than torque only 50 %.
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Old 09-28-2019, 12:43 PM   #5
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Default Re: Exhaust manifold torque spec

I used the copper ones from Bert's!
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Old 09-28-2019, 01:18 PM   #6
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Default Re: Exhaust manifold torque spec

Easy to break a manifold. Torque progressively and evenly.
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Old 09-28-2019, 04:02 PM   #7
Purdy Swoft
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Default Re: Exhaust manifold torque spec

I don't think that Ford listed torque specs . I only tighten model A manifolds with a three eight ratchet and a six point socket and common sense . The shorter handle on a three eights ratchet is usually a good bit shorter than a one half inch drive ratchet or pull handle and should reduce the risk of over tightening . After the engine goes through a heat and cool cycle , retighten .
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Old 09-28-2019, 04:23 PM   #8
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Default Re: Exhaust manifold torque spec

ive heard 35-55. 45 is what I do. 75-100 will crack the manifold. both at one time if your real lucky.
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Old 09-28-2019, 06:17 PM   #9
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Default Re: Exhaust manifold torque spec

Bratton's states 25 to 30 lb

Better safe than sorry
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Old 09-28-2019, 06:44 PM   #10
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Default Re: Exhaust manifold torque spec

The human body is amazing,Ford mechanics were taught 'feel',torque wrenches were not used. Skills were imparted,a journeyman would guide an apprentice,much as it is today.

The human body is amazing? yes sir,once a feel for the tension on an assembly is developed,its truly amazing how the brain and body work together to duplicate the same 'feel' I've actually seen the results against a torque wrench,once you have a feel for a value repeat it a few times and test it with a torque wrench,you'll be surprised.

I've also seen great consistency between a mechanic and his air operated impact wrench..know some cats who swore by a butterfly,they could nail an assembly.Flat rate specialists,real fast operators..
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Old 09-28-2019, 08:55 PM   #11
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Default Re: Exhaust manifold torque spec

I went to #35 with no issues. I retorque periodically.
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Old 09-29-2019, 09:01 AM   #12
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Default Re: Exhaust manifold torque spec

Fifty five foot pounds is usually a safe torque for heads and manifolds , if you prefer to use a torque wrench .
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Old 09-29-2019, 01:48 PM   #13
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Default Re: Exhaust manifold torque spec

25-35# is best. retorque a few times and save your manifold.
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Old 10-01-2019, 05:34 AM   #14
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Default Re: Exhaust manifold torque spec

Make sure the washers are on correctly! One hand torque re torque after heat cycles.
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Old 10-01-2019, 06:50 AM   #15
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Default Re: Exhaust manifold torque spec

Quote:
Originally Posted by J Franklin View Post
25-35# is best. retorque a few times and save your manifold.
X's 2
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Old 10-25-2019, 03:38 PM   #16
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Default Re: Exhaust manifold torque spec

How important is it to use the correct concave manifold washers?
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Old 10-25-2019, 04:11 PM   #17
Purdy Swoft
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Default Re: Exhaust manifold torque spec

Most important !!!
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Old 10-25-2019, 04:34 PM   #18
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Default Re: Exhaust manifold torque spec

Tight enough but not too tight, just like in the days when the car was built.
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Old 10-25-2019, 07:00 PM   #19
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Default Re: Exhaust manifold torque spec

Quote:
Originally Posted by Purdy Swoft View Post
Most important !!!
Thanks Purdy
I will get them.
Mac
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