Intake Manifold Pattern Numbers
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Safety Car
Joined: Mar 2000
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From: Central Pennsylvania
Intake Manifold Pattern Numbers
So out of years-long storage I dug out a 3782783 manifold I’d like to use on a project. The pattern number is “GM2”. I’ve seen these manifolds with both a “GM1” and this “GM2” designation cast into them. What’s the functional or application difference between these pattern number parts/castings?
Last edited by ettev; Aug 6, 2018 at 08:03 PM. Reason: Auto spell.
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So out of years-long storage I dug out a 3782783 manifold I’d like to use on a project. The pattern number is “GM2”. I’ve seen these manifolds with both a “GM1” and this “GM2” designation cast into them. What’s the functional or application difference between these pattern number parts/castings?
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The GMX, where X = a number from 1 to ?? that indicates the individual pattern sequence number for a serialized part (like your manifold). It means nothing, in other words.
That is as I understand it. It has nothing to do with the casting date. I have four abc heads with the GM pattern numbers of 1, 2, 5, and 7, IIRC.
That is as I understand it. It has nothing to do with the casting date. I have four abc heads with the GM pattern numbers of 1, 2, 5, and 7, IIRC.
