Exhaust manifold
Sent from my iPhone
As you have discovered, the early & later manifolds look the same. They will
both work, but they have to have a matching intake to go with it. Really the
only difference between the two is the thickness of the flange where it mounts
to the head. If the intake and exhaust donâ??t match youâ??ll have trouble
with sealing because the clamp washer wonâ??t put equal pressure on the
manifolds. I donâ??t remember which is which is which, but one of them is
about 1/16 of an inch thicker than the other. Just make sure they match &
youâ??ll be ok.
Harlan
I
> On Nov 16, 2021, at 1:01 PM, mgs-request@autox.team.net wrote:
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> 1. MGB exhaust manifold (S.Carr)
> 2. Re: MGB exhaust manifold (Barney Gaylord)
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> ----------------------------------------------------------------------
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> Message: 1
> Date: Mon, 15 Nov 2021 18:10:12 -0500
> From: S.Carr <britfan1@epix.net>
> To: MGs <mgs@autox.team.net>
> Subject: [Mgs] MGB exhaust manifold
> Message-ID: <2145325897.39869.1637017817033@epix.net>
> Content-Type: text/plain; charset="utf-8"
>
> The Moss catalog lists two different part numbers for the stock cast-iron
> manifold?depending on the years fitted?but the drawings look identical. Can
> anyone supply the casting numbers for each? We don?t know what we have.
>
> Thanks in advance,
> Sarah Carr
> BN1 in PA
>
> Sent from Mail for Windows
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> Message: 2
> Date: Mon, 15 Nov 2021 22:25:48 -0500
> From: Barney Gaylord <barneymg@mgaguru.com>
> To: S.Carr <britfan1@epix.net>,MGs <mgs@autox.team.net>
> Subject: Re: [Mgs] MGB exhaust manifold
> Message-ID: <mailman.4.1637089201.3497.mgs@autox.team.net>
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>
> The casting number is commonly one digit
> different from the final part number. I think
> they made the finished part drawing first, then
> made a copy of it to modify the drawing to show
> more material on the casting before
> machining. When assigning drawing numbers, the
> finished part number was first followed by the
> casting number. Some castings can be machined
> differently to make different finished parts (with different part numbers).
>
> Barney Gaylord
> 1958 MGA with an attitude
> http://MGAguru.com
>
>
> At 06:10 PM 11/15/2021, S.Carr wrote:
>
>> The Moss catalog lists two different part
>> numbers for the stock cast-iron
>> manifold?depending on the years fitted?but the
>> drawings look idendentical.? Can anyone supply
>> the casting numbers for each?? We don???t know what we have.
>>
>> Thanks in advance,
>> Sarah Carr
>> BN1 in PA
>> ....
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