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Re: Manifold Torgue

To: "Tom Wagner" <>, "mg" <>
Subject: Re: Manifold Torgue
From: Max Heim <>
Date: Thu, 30 Dec 1999 16:41:09 -0800
Ummm, I don't think they're kidding about the 15 ft/lbs. You don't want 
to strip the studs. Here's my recommendation:

Clean all surfaces thoroughly and test the manifold mating surfaces with 
a straightedge to make sure they're flat.

Get a new gasket.

Make sure you have the proper nuts. They are rather sharp-cornered and 
are about twice as deep as a standard nut (twice as many threads). Clean 
both the nut and stud threads, too.

Don't use lock washers. At 15 ft/lbs they don't seem to get fully seated. 
I'm sure the torque spec is for metal-to-metal, no lock washer 
compression included.

BTW, are you sure you have an air leak? The symptoms resemble a too lean 
mixture. Sometimes you have to keep the choke on to keep it running. 
There are ways to test for a leak involving flammable liquids but I don't 
want to get into that since I've never tried it myself. Perhaps the 
Haynes manual describes it. Good luck.

Tom Wagner had this to say:

>To the Wisdom of the Net:
>Can someone tell me what the setting is 
>for the torque wrench for connecting the
>exhaust/intake manifold to the engine
>on a 67 MGB.
>The Hayes manual says about 15-16 lbs.
>but I think this is not the correct number
>as I think I have an air leak as the car 
>won't start or run to good.
>So what is the correct number????
>Tom Wagner
>67 MGB
>72 TR 6


Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the red one with the silver bootlid.

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