The 1947 - Present Chevrolet & GMC Truck Message Board Network - Purpose of Mystery Factory Hole in Radiator Support?

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- - Purpose of Mystery Factory Hole in Radiator Support? (https://67-72chevytrucks.com/vboard/showthread.php?t=558163)

badpeanut

12-29-2012 03:54 AM

Purpose of Mystery Factory Hole in Radiator Support?

1 Attachment(s)

Why is this factory hole with a nut welded to the backside on the radiator support?

It is only on the passenger side.

The attached picture is a 1972 Blazer from the Internet, but my 1972 GMC pickup has it and I'm trying to figure out why GM put it there.

SS Tim

12-29-2012 05:33 AM

Re: Purpose of Mystery Factory Hole in Radiator Support?

1 Attachment(s)

It was an alternate radiator retainer location. IIRC it was used on I-6 trucks. This is a '67 V-6 (KM).

70blackfish

01-04-2013 02:39 AM

Re: Purpose of Mystery Factory Hole in Radiator Support?

A 2 inch narrower radiator, 6 cyl. and v8...i think the wide rad was a big block

ls1nova71

01-04-2013 11:58 AM

Re: Purpose of Mystery Factory Hole in Radiator Support?

Quote:

Originally Posted by 70blackfish (Post 5794817)

A 2 inch narrower radiator, 6 cyl. and v8...i think the wide rad was a big block

Small block V8's use the outter set of holes, as well as 6 cylinders with automatic transmissions or A/C. Pretty much all radiators with plastic fan shrouds.
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PanelDeland

01-04-2013 10:25 PM

Re: Purpose of Mystery Factory Hole in Radiator Support?

Width of the radiator changes from a 4 core.I don't remember all the criteria,but I went to the other holes when I put the (way overkill) 4 core in my 68 with a 250.

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