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Old August 8th, 2017, 05:39 PM
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Ed Snyder Ed Snyder is offline
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Join Date: Jan 2013
Location: Medford, Oregon
Truck: 1962, 1965, 1967
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Default Re: What type engine?

Quote:
Originally Posted by gwtaylor View Post
I recently obtained a 1963 GMC 1/2 ton step-side, manual trans. Looking at the engine its a V-6. The engine numbers are "305E234776". I am sure I will need to repair and even rebuild this engine so I need to know what I have.
Congratulations on the acquisition of your "new" truck, and for finding our forum! You'll get lots of help from lots of knowledgeable people here.

Unless there's something wrong with your engine already, you'll likely never have to do any major work on it. I like to call these V6s GM's most over-engineered and under-appreciated engines they ever produced. With proper care yours should outlive you. I've posted to the forum several times about a fellow member of our local Chevy/GMC truck club who has a '65 panel truck with 305E that has over 600,000 miles on it without a rebuild and is still going strong.

About the only way to kill one of these V6s is to over-rev it or run it out of oil. Personally, I use 3200 RPM as my redline for safety's sake, although 3500 should be OK. And I always use high-zinc Amsoil 10W40. Of course, everyone has their favorite oil. Modern engine oils are light-years better than the oils available in the '60s, and greatly enhance engine life.

So treat yours right and you should get many years' enjoyment out of it.
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Ed Snyder
Medford, Oregon
1962 1000 Pickup 401M & Muncie 318 with overdrive
1962 K1000 Suburban 401M & SM420
1965 2500 Suburban 351C & SM420 with Watson overdrive
1967 CM1500 pickup 351E & NP435
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