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GMC V6 and V12 Engines Engine repair and rebuilding

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  #1  
Old September 15th, 2020, 01:58 AM
jastamjas jastamjas is offline
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Default Rocker Arms

Wheres the best place to buy rocker arms for a 305 V-6. I was hoping Rockauto but I don't think they stock them anymore. Thanks for the help. I have to cracked by the way.

I did fine this Part #: MRK402 Line: MEL at O'rileys I cant tell if its the right one though.
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Old September 15th, 2020, 03:08 AM
snazzypig snazzypig is offline
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Default Re: Rocker Arms

Good used ones might be your best solution. I would also wonder what caused them to break.
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Old September 15th, 2020, 05:00 PM
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Funky61 Funky61 is offline
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Default Re: Rocker Arms

This may be more than you want

https://www.ebay.com/itm/1965-1966-G...gAAOSwUqNfPviX
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Old September 16th, 2020, 01:41 AM
jastamjas jastamjas is offline
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Default Re: Rocker Arms

Thanks for that ebay link. I think I will go with that. As far as what caused them to crack I have no clue. I have only had this pickup for a few months and just now starting to dig into it. You know how it goes. It all starts with just pulling the valve covers off to clean and paint them to pulling heads and down the rabbit hole you go. I am not doing a rebuild or anything just a little cleaning and painting.
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Old September 17th, 2020, 12:05 AM
James James is offline
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Default Re: Rocker Arms

While you have the rocker arm out of the way. Take a mallet and tap on the intake valves. The bent push rod and broken rocker arm might be from a stuck intake valve. This is sometime caused by running the engine on old gas. Once the engine cooled down the valves are stuck. Starting it again cause the damage.
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Old September 17th, 2020, 01:30 AM
jastamjas jastamjas is offline
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Default Re: Rocker Arms

Ok will do. It still amazes me the lack of parts for the engines. I think they are pretty cool so I want to keep it as long as possible. Plus I can’t think of a easier motor to learn to work on


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