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)

- - 305 V6 Questions (https://6066gmcclub.com/showthread.php?t=47711)

davbell25413

August 17th, 2013 02:38 PM

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/

6066gmcguy

August 17th, 2013 04:17 PM

Re: 305 V6 Questions

It should have 4 ring pistons, but if you can only find 3 ring piston that should be OK.

davbell25413

August 17th, 2013 10:55 PM

Re: 305 V6 Questions

Quote:

Originally Posted by 6066gmcguy (Post 49823)

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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