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06-29-2019, 09:29 PM
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#1 |
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Registered User
Join Date: May 2019
Location: CHINA SPRING tx
Posts: 27
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radiator drain.
i cant seem to find a radiator drain plug for my 72 c10 i am trying to flush and refill. im new to this and everything i see on youtube and google seem to be for newer vehicles. do i just take the hose off the engine and drain it?
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06-29-2019, 10:04 PM
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#2 |
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Registered User
 
Join Date: Jun 2009
Location: Portland - OR
Posts: 243
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Re: radiator drain.
You could do that. My drain on my 71 is on the lower drivers side
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06-29-2019, 11:07 PM
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#3 |
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20' Daredevil (Ret)
Join Date: May 2003
Location: Jefferson State
Posts: 13,692
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Re: radiator drain.
Yep, it's called a petcock and it should be on the lower drivers side at the rear of the radiator. Should look similar to this.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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06-29-2019, 11:08 PM
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#4 |
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Who Changed This?
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,592
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Re: radiator drain.
There should be a petcock situated like Mbeef61 says. You can indeed take the lower radiator hose off at the radiator and let the system drain. That's lots of fun. Is the truck new to you? maybe check the condition of the hoses and replace as necessary?
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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06-30-2019, 07:03 PM
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#5 |
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Registered User
Join Date: May 2019
Location: CHINA SPRING tx
Posts: 27
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Re: radiator drain.
yes i have had it now for about 4 months. slowly working on replacing things i know the previous owner didnt really take care of. thank you for the help. i will look for the petcock.
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06-30-2019, 07:31 PM
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#6 |
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Registered User
Join Date: May 2019
Location: CHINA SPRING tx
Posts: 27
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Re: radiator drain.
Unfortunately there is no petcock. The radiator seem to be on top of a metal mount but there isn't anything coming out from the the mount. Any suggestions?
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06-30-2019, 07:45 PM
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#7 |
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Registered User
Join Date: Feb 2019
Location: So Cal, CA
Posts: 108
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Re: radiator drain.
Should be lower left corner as already mentioned. Your only option is to pull off the radiator hose
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1971 C20 Longhorn 350/350 "Conquistador" |
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06-30-2019, 08:04 PM
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#8 |
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Who Changed This?
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,592
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Re: radiator drain.
There were a few years where the radiators did not have a petcock. You'll have to siphon it out and/or pull the lower hose.
__________________
~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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07-01-2019, 10:35 AM
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#9 |
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Registered User
Join Date: Feb 2011
Location: Parkville, MD
Posts: 1,024
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Re: radiator drain.
I've use a Mity Vac (Vacuum pump) to drain the coolant. Siphon works too. A lot slower, but much cleaner. Once you siphoned out all you can, pull the lower hose.
__________________
1970 C20 Custom Camper - 350, TH350 1997 GMC Suburban 1994 Acura Integra GSR 1987 Dodge Daytona Shelby Z |
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