6066 (1960-1966) GMC Truck Club

6066 (1960-1966) GMC Truck Club (https://6066gmcclub.com/index.php)

- GMC V6 and V12 Engines (https://6066gmcclub.com/forumdisplay.php?f=9)

- - oil pump (https://6066gmcclub.com/showthread.php?t=50211)

Otto68

November 16th, 2017 02:19 PM

oil pump

1 Attachment(s)

I have two oil pumps and was wondering what the difference between them is if anyone can help that would be great.

the one on the right is 2449572 A12 V (round ends)
left is 668593 A4

bigblockv6

November 17th, 2017 04:59 AM

Re: oil pump

The one on the right is definitely the lighter duty oil pump used on 305 and 351 engines, the pump on the is the heavy duty version used on bigger displacement V6 engines.

Otto68

December 6th, 2017 03:12 PM

Re: oil pump

Thank you bigblockv6 for the reply, I thought it was the other way around seeing the gear was a lot thicker on the rounded end one.

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