What are these holes? [Archive]

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McGuire

06-02-2007, 02:44 PM

Hey guys,
This pic is of a new ZZ SBC crate motor. What are the two holes for at the rear top of the block near the bellhousing flange. There is a set on both the drivers side and passenger side, one hole is threaded and all the way through and the other is a little bigger, no threads and does not go all the way through. Thanks for any help.

Mcguire
https://static1.pt-content.com/images/pt/2007/06/100_0538-1.jpg

HILROD

06-02-2007, 06:40 PM

Assembly holes, probably. The small holes are used on some older Vettes to hold wire looms. They would be un-needed for you.

McGuire

06-03-2007, 02:36 PM

Thanks Hilrod, appreciate the help.

PARKERRS

06-04-2007, 04:04 AM

They are for the plug wire loom clips. Chevy sells a set of plug wire looms for the ZZ engines and one goes on each side of the block here. They have a small screw in the threaded hole and a bent tab to keep them from twisting goes in the other hole.

MonzaRacer

06-14-2007, 09:04 PM

They Arealso Used For Milling Registers Too.