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Other Rides and Projects Working on another year GMC? Maybe a Chevy, Dodge, F*rd, or even refinishing cabinets? Share your progress or start a build thread and let members follow along!

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  #21  
Old January 9th, 2015, 06:52 AM
Hantke Hantke is online now
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Default Re: 1966 c20

Cool, thanks. The truck was originally a 327 V8 then converted later on. Do you know what that plug is for?


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  #22  
Old January 9th, 2015, 07:12 AM
Hantke Hantke is online now
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Default Re: 1966 c20

Cool, I know it was a 327 V8, then swapped to a 250 I6 afterwards. I still want to figure out about the hole, though I really need to find a better plug for it and fix all the random loose stuff. Thanks for the info!


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1966 Chevy C20 - Winter Project / work truck build?
2006 Suzuki GS500F - finished rebuilding after wreck / soon to be DD
GMC Hunting - I'll get my hands on one of 'em eventually.
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  #23  
Old January 9th, 2015, 07:13 AM
Hantke Hantke is online now
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Default Re: 1966 c20

My phone is jacking up, not sure if any of my previous posts went through or not, but I'll check in tomorrow and fix anything that is messed up.


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  #24  
Old January 9th, 2015, 02:38 PM
Jeannie Jeannie is offline
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Default Re: 1966 c20

Quote:
ever use that royal purple oil treatment? its supposed to help with low compression and high mileage engines. I'm thinking about giving it a shot when I replace the oil.
Hantke,

Marvel Mystery Oil is a common additive for low compression issues. Many members report good results from it. If memory serves it is around $24.00 per gallon at major Wal-Mart supercenters.

-Jeannie

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  #25  
Old January 9th, 2015, 04:46 PM
bigblockv6 bigblockv6 is online now
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Default Re: 1966 c20

Quote:
Cool, thanks. The truck was originally a 327 V8 then converted later on. Do you know what that plug is for?


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You mean the plug on the side of the valve cover? That was used for the hose and pipe that ran into the air cleaner, basically the breather for a closed ventilation system. It would be a good Idea to route one up to make it complete before you blow out a main seal.
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  #26  
Old January 9th, 2015, 07:02 PM
Hantke Hantke is online now
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Default Re: 1966 c20

That's good to know, I know it will fall out if you so much as look at it funny right now. Would it be OK to put one of those little breather filters on it? I don't have an air filter yet, so I can't hook it to that yet.


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  #27  
Old January 9th, 2015, 07:03 PM
bozzhogg bozzhogg is offline
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Default Re: 1966 c20

In respect to your head lite's have you tried replacing the dimer switch. I had the same problem on my '72 GMC dump truck and that's what it turned out to be. Ross Durham, NC '66 GMC with '12 flat bed, '72 GMC dump.
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  #28  
Old January 9th, 2015, 07:05 PM
Hantke Hantke is online now
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Default Re: 1966 c20

It turns out the headlights were shot, I replaced them both and they both work fine now. I'm lucky that was the issue, because my multi meter just broke!


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  #29  
Old January 10th, 2015, 01:17 AM
Hantke Hantke is online now
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Default Re: 1966 c20

So I finished the rebuild today, and WOOOOOHOOOOO it started with the first turn of the key! But now it's definitely leaking gas and I'm not sure if it's the carb gasket or if it's the new fuel filter. The carb doesn't back fire, but when I turn it off it does smoke for a couple minutes.

The whole carb and obvious wet spot (all gas)


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The wet gasket (wet along the edges)


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Before the fuel filter was just screwed in, so I removed it and added a rubber gasket (neoprene) in between, and it still leaked! I'm not sure where it's coming from and I don't think it would be the gasket, though it's a definite possibility. I'm going to re-adjust the floats to sit lower in the bowl and see if that fixes it, if not, I'm lost.


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1966 Chevy C20 - Winter Project / work truck build?
2006 Suzuki GS500F - finished rebuilding after wreck / soon to be DD
GMC Hunting - I'll get my hands on one of 'em eventually.
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  #30  
Old January 10th, 2015, 01:32 AM
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FetchMeAPepsi FetchMeAPepsi is offline
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Default Re: 1966 c20

Do you have someone that can jump in and start it tomorrow after it's all dried out? That way you could watch and see where it starts.
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