Egr valve thread size in manifold

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10-22-2014, 09:15 PM

73 ford guy

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Egr valve thread size in manifold

Looking at some 5.8 headers from a guy but it's missing the egr thread on passenger header for the male fitting to thread into. Anyone recall what the thread size and pitch so I can just weld a nut/bung in

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10-23-2014, 12:20 PM

Conanski

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I don't remember what size it is but I do know the female end of another tube makes a great weld on bung for this.

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10-23-2014, 01:01 PM

ichabod40

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I believe the bung in my driver's side manifold is 3/4" NPT.

There is a special elbow that threads into it though and then the EGR line connects to that elbow

Last edited by ichabod40; 10-23-2014 at 01:19 PM. Reason: Clarification

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10-23-2014, 01:26 PM

Conanski

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Quote:

Originally Posted by ichabod40

There is a special elbow that threads into it though and then the EGR line connects to that elbow

That would be on the 460 only.

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10-23-2014, 01:58 PM

SteelHorse4x4

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Just threaded my 3/4 NPT tap into the manifold on my 1994 5.8 so there ya go.

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10-23-2014, 01:58 PM

rla2005

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I am not certain what size that adapter is but it is Ford Part# FOTZ-9F485-A

Edit: I did find a reference to the EGR fitting thread size as M27.....

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03-25-2016, 10:24 AM

mobes

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I know this is an old thread, but in case anyone else is looking - I just had to tap a new set of BBK headers as they were not correctly threaded.

It was M27-2.0 thread.

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Egr valve thread size in manifold

Egr valve thread size in manifold

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