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#1 |
Quit if it's not FUN!!!
Join Date: Jul 2010
Location: Indian Trail, N.C,
Posts: 864
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Coolant Recovery issues
![]() I have a question. I installed an overflow bottle under the hood and plumbed the radiator overflow hose into the bottom of the top-vented bottle. I replaced the radiator cap with what I thought was the correct type. I am losing coolant somehow - no visible signs -, but there doesn't seem to be any flow, either way, between the radiator and the bottle. What am I doing wrong??? Any and all suggestions appreciated. |
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#2 |
Registered User
Join Date: Oct 2010
Location: Kansas City
Posts: 3,590
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Re: Coolant Recovery issues
x2
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Willie Swamp Angel Truckers '72 C10 Highlander ![]() People who blindly follow a GPS end up on television programs on The Weather Channel. Some survive, some don't. ![]() |
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#3 |
Project Junkie! Fishing Poor!!
![]() Join Date: Dec 1999
Location: Olympia,Wa. 98512
Posts: 10,770
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Re: Coolant Recovery issues
If your radiator was full when the truck was cold then the expanded water once warmed up had to go somewhere. If not in the overflow bottle you installed then it could be possible that you had a bubble in the water passages in your block not alowing all the water in the block. Once it broke loose your block could have used the expanded water. Next problem could be a leak somewhere. You just have to inspect for that. Finaly you could have a blown head gasket that is alowing water to get into and it is evaporating and going out the tailpipe. WES
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On-line catolog Classic Heartbeat Pickup Parts WEHEPP@comcast.net Call us Toll Free (888) 338-2502 Like Us on Facebook No appointment necessary. 72 BB Chevy Custom Deluxe / Custom Camper 67 I-6 (Soon to be 5.7 LS1) Panel 68 BB Chevy Short Bed 72 6.0 LQ9 Short Bed Chevy 4X4 Olympia's fastest growing truck parts supplier. Olympia's home for Wayward Chevys |
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#4 |
Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: Coolant Recovery issues
i'd check your oil real good
also check weephole on waterpump
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71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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#5 |
Active Member
![]() Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: Coolant Recovery issues
From this site: http://www.carcraft.com/techarticles...e/viewall.html
........Look for two rubber sealing gaskets on the nonvented cap. The normal seal on the very bottom is what seals the radiator pressure and is relieved only when the pressure exceeds the rating on the cap. The second seal will be located directly underneath the cap and is designed to seal the cap for use with overflow systems. The vented cap probably does not have this second seal under the cap and allows overflow out the tube where it is dumped on the ground. |
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#6 | |
Registered User
Join Date: Jul 2010
Location: Leesburg, VA
Posts: 420
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Re: Coolant Recovery issues
Quote:
I don't understand the difference between the vented and nonvented caps. Isn't the concept the same with both caps, just with the coolant recovery tank you're allowing the system to suck up coolant instead of air once the system cools down? Why are there two different types of caps? In both scenarios you need a cap that vents coolant when it gets hot and expands and then draws back in once it cools, so shouldn't the same cap work for venting to the ground and into an overflow tank? I don't mean to be dense, just trying to understand how the process works.
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Curt 1970 C/10, 250 L6 with Rochester BV carb, SM465 4 speed, 3.73 open rear |
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#7 |
Active Member
![]() Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: Coolant Recovery issues
Upper seal keeps coolant in the system from escaping out of the top and basically keeps it an enclosed system.
Bottom seal opens up when radiator pressure exceeds cap pressure rating. Heat expanded coolant is then vented into reservoir. When the radiator cools back down, a vacuum is created in the cooling system that pulls open another spring loaded valve, sucking water back in from the bottom of the overflow tank to replace the water that was expelled. That would be the brass "check valve" in the bottom center of the cap. From this site:http://ls1tech.com/forums/conversion...uestion-2.html |
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#8 | |
Registered User
Join Date: Jul 2010
Location: Leesburg, VA
Posts: 420
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Re: Coolant Recovery issues
Quote:
Thanks for clearing that up for me!
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Curt 1970 C/10, 250 L6 with Rochester BV carb, SM465 4 speed, 3.73 open rear |
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