9 lb radiator cap [message #94205] |
Sun, 01 August 2010 16:50 |
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ljdavick
Messages: 3548 Registered: March 2007 Location: Fremont, CA
Karma: -3
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Someone had mentioned that it's difficult to find a 9 lb radiator cap. I was at my local parts store today and they had it in stock. It's a Federated T-9. Nice octagonal shape, too.
Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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Re: 9 lb radiator cap [message #94246 is a reply to message #94205] |
Sun, 01 August 2010 22:02 |
Chr$
Messages: 2690 Registered: January 2004 Location: Scottsdale, AZ
Karma: 1
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I have a 16 lb. Is 9 the correct one?
-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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Re: [GMCnet] 9 lb radiator cap [message #94251 is a reply to message #94246] |
Sun, 01 August 2010 22:39 |
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ljdavick
Messages: 3548 Registered: March 2007 Location: Fremont, CA
Karma: -3
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Senior Member |
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My '75 - '76 manual says a 9 lb cap. If you have the aluminum radiator, and are certain that your heater core and water heater can take the pressure then you might be okay. On the other hand your 16 lb cap might only hold 9 lbs!
Larry Davick
The Mystery Machine
On Aug 1, 2010, at 8:02 PM, Chris Choffat wrote:
>
>
> I have a 16 lb. Is 9 the correct one?
> --
> -Chr$: Perpetual SmartAss
> 77 Ex-Kingsley 455, Power Drive, 3:21 FD, Quadra bag. The Engineer's Motorhome
> Scottsdale, AZ
>
> Photosite: Chrisc "It has Begun"
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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Re: [GMCnet] 9 lb radiator cap [message #94255 is a reply to message #94251] |
Sun, 01 August 2010 23:12 |
George Beckman
Messages: 1085 Registered: October 2008 Location: Colfax, CA
Karma: 11
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ljdavick wrote on Sun, 01 August 2010 20:39 | My '75 - '76 manual says a 9 lb cap. If you have the aluminum radiator, and are certain that your heater core and water heater can take the pressure then you might be okay. On the other hand your 16 lb cap might only hold 9 lbs!
Larry Davick
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I agree. I have heard that the type of radiator our rigs have is not built for over 9 lbs.
'74 Eleganza, SE, Howell + EBL
Best Wishes,
George
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Re: 9 lb radiator cap [message #94259 is a reply to message #94205] |
Mon, 02 August 2010 00:27 |
Ken Burton
Messages: 10030 Registered: January 2004 Location: Hebron, Indiana
Karma: 10
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ljdavick wrote on Sun, 01 August 2010 16:50 | Someone had mentioned that it's difficult to find a 9 lb radiator cap. I was at my local parts store today and they had it in stock. It's a Federated T-9. Nice octagonal shape, too.
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Auto Zone has that same 9 pound cap with octagon shape. It is very easy to remove compared to the OEM Delco one.
I have the aluminum radiator but still stayed with the 9 pound cap since my coach ever gets hot enough to need the additional pressure to prevent boiling.
I'm also running a 180 degree thermostat so the engine normally runs cooler with no vapor lock problems.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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radiator cap life span [message #94261 is a reply to message #94259] |
Mon, 02 August 2010 00:35 |
bukzin
Messages: 840 Registered: April 2004 Location: North California
Karma: 0
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Did I hear somewhere that these caps have a short life span
and should be replaced every few years?
Bukzin
1977 Palm Beach
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Re: [GMCnet] radiator cap model numbers [message #94320 is a reply to message #94311] |
Mon, 02 August 2010 12:16 |
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ljdavick
Messages: 3548 Registered: March 2007 Location: Fremont, CA
Karma: -3
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Senior Member |
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By the way - my new 9 lb radiator cap was all of $4 and change. Might be something to put on the maintenance schedule - change cap, hoses, and coolant every other year...
Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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