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68 442 Intake anomaly?

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May 7, 2021 | 08:19 PM

#1

droldsmorland

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CH3NO2 LEARN IT BURN IT

Joined: Jul 2010

Posts: 5,636

From: Land of Taxes

68 442 Intake anomaly?

Has anyone witnessed this hex head pipe plug in the heat riser crossover on a 68 400/400?...400 ci (6.6L) TH400 trans.
Early build Z code (Fremont) 09C.(Sept 1967).

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Old

May 8, 2021 | 06:38 AM

#2

joe_padavano

Old(s) Fart

Joined: Mar 2007

Posts: 50,803

From: Northern VA

Never seen that from the factory. It looks like it was done over the years for an exhaust gas temp probe or something.

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Old

May 8, 2021 | 09:40 PM

#3

droldsmorland

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CH3NO2 LEARN IT BURN IT

Joined: Jul 2010

Posts: 5,636

From: Land of Taxes

Ya never noticed it before. Only owned it for 40 years.

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Old

May 9, 2021 | 02:01 AM

#4

rob1960

Registered User

Joined: Mar 2009

Posts: 845

From: Ohio

I've never seen that either. Maybe some kind of repair for a defect in the casting like a pin hole???

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Old

May 9, 2021 | 09:08 AM

#5

Koda

Registered User

Joined: Aug 2013

Posts: 12,806

From: Evansville, IN

EGR wasn't a thing yet, so either repair like said, or something with the choke (even though it's on the wrong side) is about all I can think of.

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