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GMC V6 and V12 Engines Engine repair and rebuilding

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  #1  
Old August 17th, 2013, 02:38 PM
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davbell25413 davbell25413 is offline
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Default 305 V6 Questions

I got 351M according to the vin on the 69 gmc medium duty. Through a rod but the hole is the oilpan and not block. Plus is broke part of the piston skirt too. Got some questions I need answered so I get this back up and running again.

Does the medium duty trucks have 3 or 4 pistons rings? If 4 ring will a 3 ring piston work? Know of good parts source for parts for this engine?

I found some 305/351M v6 parts for them here

http://www.mecanicapedrosa.com/
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Old August 17th, 2013, 04:17 PM
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Default Re: 305 V6 Questions

It should have 4 ring pistons, but if you can only find 3 ring piston that should be OK.
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Old August 17th, 2013, 10:55 PM
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Default Re: 305 V6 Questions

Quote:
Originally Posted by 6066gmcguy View Post
It should have 4 ring pistons, but if you can only find 3 ring piston that should be OK.
Thanks for answering my 2 big questions that couldnt answered get anywhere else.
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