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Radiator cap [message #292699]

Mon, 21 December 2015 22:35

Hal StClair

Messages: 971
Registered: March 2013
Location: Rio Rancho NM

Karma: -12

Senior Member

Wondering if anyone would have the part number for the aluminum radiator cap. I'm looking for a 16lb cap and 'think' it needs a 7016 but haven't been able to confirm it. Any help would be appreciated.
Thanks,Hal

"I enjoy talking to you. Your mind appeals to me. It resembles my own mind, except you happen to be insane." 1977 Royale 101348, 1977 Royale 101586, Diesel powered, 1974 Eagle Bus 45',w/slideout, Rio Rancho, NM

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Re: [GMCnet] Radiator cap [message #292701 is a reply to message #292699]

Mon, 21 December 2015 22:54

powwerjon

Messages: 849
Registered: March 2013

Karma: -2

Senior Member

16# cap ACDelco part# 12R9S lever release is what Bob Drews listed when he put the aluminum radiator in his coach in 2007.

J.R. Wright
GMC GreatLaker
Newsletter Editor/Publisher
78 Buskirk 30' Stretch
75 Avion Under Reconstruction
Michigan

> On Dec 21, 2015, at 9:35 PM, Hal StClair wrote:
>
> Wondering if anyone would have the part number for the aluminum radiator cap. I'm looking for a 16lb cap and 'think' it needs a 7016 but haven't been
> able to confirm it. Any help would be appreciated.
> Thanks,Hal
> --
> 1977 Royale 101348,
>
> 1977 Royale 101586,
>
> 1974 Eagle Bus 45',w/slideout
>
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Re: [GMCnet] Radiator cap [message #292721 is a reply to message #292701]

Tue, 22 December 2015 09:47

appie

Messages: 902
Registered: April 2013
Location: denmark

Karma: 2

Senior Member

My alu radiator came with a 7 pound cap. Is it safe to use these with higher compression?

Appie eleganza 76 "Olga" now sadly sold 6 wheel discbrake Quadrabags Springfield stage 2 462 olds Manny tranny ( pictures at http://www.gmcmhphotos.com/photos/g6489-olga.html Fulltiming in Europe july 2014 til july 2016 Denmark

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Re: Radiator cap [message #292728 is a reply to message #292699]

Tue, 22 December 2015 10:26

Glenn

Messages: 92
Registered: February 2004
Location: Northwestern Ontario

Karma: 2

Member

My came with info that you could use a 16lb cap. I ran that with no problems until my fan clutch failure, so now I basically have a scrap piece of aluminum. My heater core had no problem with the higher pressure.

HTH.........
Glenn
76 Glensbroke

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Re: Radiator cap [message #292732 is a reply to message #292728]

Tue, 22 December 2015 10:36

appie

Messages: 902
Registered: April 2013
Location: denmark

Karma: 2

Senior Member

If the engine does not get hot the pressure will be the same. The higher pressure rate allows the engine to get hotter without boiling the coolant. Right ?

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Re: Radiator cap [message #292738 is a reply to message #292732]

Tue, 22 December 2015 11:26

Ken Burton

Messages: 10030
Registered: January 2004
Location: Hebron, Indiana

Karma: 10

Senior Member

You are correct.

Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana

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