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Builds and Journals This is where the magic happens. Photograph & document your GMC build progress for posterity.
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  #51  
Old March 1st, 2021, 10:51 AM
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GMCTom GMCTom is offline
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Default Re: 1965 GMC in the alps. Greetings from Austria.

Quote:
I ordered a new waterneck (75 Pontiac TransAm) because the old one was a modified from a Chevy small block. Let's see if it fits.
The waterneck of the 75 Pontiac TransAm fits together with the holes. Only problem is, that you can't use the heat sensor.



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  #52  
Old March 1st, 2021, 01:15 PM
Prowbar Prowbar is offline
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Default Re: 1965 GMC in the alps. Greetings from Austria.

GMCTom, Great work you've done so far! Great info as well regarding the clutch etc. No other modifications to the engine other than replacing the timing chain?
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  #53  
Old March 1st, 2021, 02:23 PM
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GMCTom GMCTom is offline
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Default Re: 1965 GMC in the alps. Greetings from Austria.

Thank you

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I changed the timing chain and toghether with a friend we do a valve job. One exhaust valve was broken and doesn't close completely. Cleaned the coolant holes and finished the surfaces of the block and heads and used new gaskets. Heads were ice blasted.
I also installed an original mechanical fuel pump (the pre owner used an electrical) and new fuel lines.
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  #54  
Old March 6th, 2021, 04:04 AM
snazzypig snazzypig is offline
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Default Re: 1965 GMC in the alps. Greetings from Austria.

Beautiful work GMCTom and your engine sounds great!
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  #55  
Old March 25th, 2021, 09:10 AM
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GMCTom GMCTom is offline
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Default Re: 1965 GMC in the alps. Greetings from Austria.

Little update but with not so good news.

The original radiator is leaking. Temporarily I bought a used one from a 1966 Chevy C10. It seems to be ok. The dark spot on the front of the radiator is only dirt. The original one I will send to a shop for repairing.



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Now the bigger problem. Between the left cylinder head and the block it's leaking a little bit coolant. I think I have to grind the heads. Maybe anyone else had an advice or already had the problem itself?
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