The Stovebolt Page Forums Home | FAQ | Forum | Swap Meet | Gallery | Tech Tips | Links | Events | Features | Search | Hoo-Ya Shop
Stovebolt Supporter!
American Classic
Truck Parts


Fall is here!

Irwin A with a tip for engine swap

The last of the shows will soon be only digital pictures and fond memories. If you are getting your Bolt ready for some last cruises, or just thinking about putting her up for winter, be sure to check out what parts you need from American Classic Truck Parts. They still offer a 10% discount to Stovebolters.

Stovebolt On!

Stovebolt Site Search
 
Old Truck Calendars
Months of truck photos!
Nothing like an old truck calendar

Stovebolt Calendars

Some New
Some Vintage
Many in Production

Check for details!

Will be updating all year around!


Who's Online
19 registered (491ton, azcornman, 58limited, 46possum, 53 Dumpy, 2 invisible), 652 Guests and 6 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
39,527 Registered Members
48 Forums
105,744 Topics
824,780 Posts

Most users ever online: 910 @ Sat Sep 10 2016 09:53 PM
Today's Birthdays
17dave, dhckdkcsk, Jered, Paul's53chevy, {-_-}
Image Posting Policy
Page 2 of 2 < 1 2
New Reply
Topic Options
#1209441 - Sun Mar 19 2017 09:38 PM Re: radiator cap [Re: DaveV]
Achipmunk Offline
Registered: Tue Dec 11 2001 12:00 PM
Posts: 15436
Loc: Boiling Springs, S. C. 29316
Can you find another radiator shop close by??? We have an older shop here that will actually order the pieces it takes to "make up" a heater core but I'll admit, its a bit pricey at around 200 bucks but then most of us would never have to worry about it in our live time....or at least it could be repaired later.
Don't give up just yet...........
_________________________
1937 Chevy Pickup
1952 Chevy Panel
Pictures in my Photobucket
1950 Chevy Coupe

I'd rather walk and carry a Chevy hub cap than ride in a Ferd.
I can explain it to you, but I can't understand it for you smile
Top
#1209457 - Sun Mar 19 2017 11:45 PM Re: radiator cap [Re: DaveV]
Forty9 Offline
Shop Shark
Registered: Wed Apr 16 2008 11:50 AM
Posts: 574
Loc: Henderson, Nevada
Stant 10203 is a 0 pressure cap. Napa can cross reference it to their brand. Amazon also has Stant 10203.
_________________________
Ed
Top
#1209468 - Mon Mar 20 2017 06:40 AM Re: radiator cap [Re: Forty9]
DaveV Offline
Wrench Fetcher
Registered: Sat Sep 22 2012 04:11 AM
Posts: 67
Loc: SE Wis
So it is ok to run a 0 psi cap. Thanks for all the replies. Dave


Edited by DaveV (Mon Mar 20 2017 06:43 AM)
Top
#1209485 - Mon Mar 20 2017 09:15 AM Re: radiator cap [Re: DaveV]
tclederman Offline
Registered: Tue Sep 18 2001 12:00 PM
Posts: 24473
Loc: Jarvisburg, NC
Yes, a 0 psi radiator cap is OK.

4psi should also be OK.

If you go higher, you might be moving into pressure-territory that might be too high for other components (the heater, for example).
Top
#1209573 - Mon Mar 20 2017 07:52 PM Re: radiator cap [Re: Hotrod Lincoln]
52Carl Offline
Shop Shark
Registered: Mon Mar 15 2010 10:27 PM
Posts: 4347
Loc: Virginia
Originally Posted By Hotrod Lincoln
. You can make a zero-pressure cap by removing the lower rubber gasket of the existing cap.
Jerry

Hey Jerry,
For an overflow tank to function, doesn't the radiator cap need to have a tight seal as the antifreeze cools off? The coolant loses volume as it cools, creating a vacuum which is the force that draws the coolant back out of the overflow tank. If the cap has had the seal removed, wouldn't that break the vacuum, preventing the coolant to be drawn back into the radiator? Maybe I don't understand how a pressure cap, modified by removing the lower seal works.
Carl
Top
#1209661 - Tue Mar 21 2017 10:43 AM Re: radiator cap [Re: DaveV]
Jim Sears Offline
Shop Shark
Registered: Mon Jan 14 2013 11:36 AM
Posts: 1302
Loc: MA
As long as the neck of the radiator is sealed then all the pressure/vacuum is acting on the overflow tube. A pressure cap with the lower seal removed still seals the top of the neck.
You should always start with the radiator full to the top and the tank 1/2 full. It will eventually equalize to a level doesn't overflow and is air free.


Edited by Jim Sears (Tue Mar 21 2017 10:45 AM)
Top
#1209673 - Tue Mar 21 2017 12:08 PM Re: radiator cap [Re: DaveV]
Hotrod Lincoln Offline
Extreme Gabster
Registered: Mon Feb 23 2004 12:00 PM
Posts: 14071
Loc: Dellrose, TN
Jim's got the picture. There is a flexible metal piece at the top of the cap that seals the top of the filler neck as the cap is tightened fully. It would also be possible to drill the top of the radiator cap for a long sheet metal screw that would retract the spring loaded center of the cap slightly to prevent pressure buildup. A factory 0-PSI cap is a better choice, though.
Jerry
_________________________
"It is better to be feared than loved, if one cannot be both"
Machiavelli

"He ain't even got a noddin' acquaintance with the truth- - -let alone a speakin' one!"

Top
#1209743 - Tue Mar 21 2017 08:42 PM Re: radiator cap [Re: DaveV]
52Carl Offline
Shop Shark
Registered: Mon Mar 15 2010 10:27 PM
Posts: 4347
Loc: Virginia
Thank you for the education gents. (Glad I didn't go all "I-told-you-so, what-were-you-thinking-with-your-2-3-braincells-to-rub-together, etc. smile )
Top
#1209798 - Wed Mar 22 2017 12:04 AM Re: radiator cap [Re: DaveV]
Rich'sToys Offline
Shop Shark
Registered: Wed Jul 28 2004 12:00 PM
Posts: 3010
Loc: Janesville, Mn
I learned something there too!
_________________________
Rich

'47 Loadmaster


The indignation of politicians is NOT a good measure of the gravity of any situation!--Paul Harvey


I would rather live my life as if there is a God and die to find out there isn't, than live my life as if there isn't and die to find out there is.




Top
Page 2 of 2 < 1 2

Moderator:  cletis 

Home | FAQ | Forum | Swap Meet | Gallery | Tech Tips | Links | Events | Features | Search | Hoo-Ya Shop
#-->