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GMC V6 and V12 Engines Engine repair and rebuilding

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  #1  
Old November 16th, 2017, 03:19 PM
Otto68 Otto68 is offline
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Default oil pump

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
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  #2  
Old November 17th, 2017, 05:59 AM
bigblockv6 bigblockv6 is online now
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Default 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.
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Old December 6th, 2017, 04:12 PM
Otto68 Otto68 is offline
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Default 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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