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02-02-2026, 10:46 PM
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#1 |
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Senior Member
 
Join Date: Jan 2025
Location: Arizona in a van down by the river
Posts: 619
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Radiator cap for a recovery tank system
I put in a recovery tank to catch the overflow but I think I need a recovery cap to be able for it to suck back in. Will any closed system cap work or do I need a specific recovery cap. Any recommendations on which one (AC RC 95?)
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1972 C10 Custom Deluxe Highlander 402 Freedom isn't safe, it requires you to take responsibility for your own life, your own safety, and your own success. It carries with it the possibility of failure and the understanding that you're working without out a safety net. If you give the state the responsibility for any of these you also give up the freedom that accompanies the responsibility. |
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02-03-2026, 01:25 AM
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#2 |
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20' Daredevil (Ret)
Join Date: May 2003
Location: Jefferson State
Posts: 14,020
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Re: Radiator cap for a recovery tank system
I don't think the brand matters -- I bought mine from NAPA, can't recall the brand. It just needs to have a double seal (instead of single) to work as a sealed system.
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- Mike - 1972 K20 LWB 350/350/205 RIP El Jay |
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02-03-2026, 11:31 AM
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#3 |
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Senior Member
  
Join Date: Jan 2005
Location: CA
Posts: 7,025
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Re: Radiator cap for a recovery tank system
I used an ACDelco RC32 cap. Appears to be difficult to find new at the moment. There are a few on eBay.
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02-03-2026, 11:55 AM
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#4 | |
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Senior Member
Join Date: Jan 2025
Location: Arizona in a van down by the river
Posts: 619
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Re: Radiator cap for a recovery tank system
Quote:
__________________
1972 C10 Custom Deluxe Highlander 402 Freedom isn't safe, it requires you to take responsibility for your own life, your own safety, and your own success. It carries with it the possibility of failure and the understanding that you're working without out a safety net. If you give the state the responsibility for any of these you also give up the freedom that accompanies the responsibility. |
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02-03-2026, 11:59 AM
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#5 |
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Senior Member
Join Date: Jan 2005
Location: CA
Posts: 7,025
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Re: Radiator cap for a recovery tank system
The RC32 is definitely for an overflow bottle application. It is working that way successfully on my two trucks. It is recommended in this thread.
https://67-72chevytrucks.com/vboard/...light=overflow |
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02-03-2026, 02:33 PM
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#6 |
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Registered User
Join Date: Dec 2005
Location: Kalifornia
Posts: 447
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Re: Radiator cap for a recovery tank system
The Stant 330 (likely referring to 10330) is a 16 PSI Lev-R-Vent radiator cap designed for systems with a coolant recovery tank. It features a "double seal" design that allows coolant to expand into an overflow bottle when hot and pull it back into the radiator upon cooling, preventing engine overheating.
The one I have. Works as described. |
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02-03-2026, 03:40 PM
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#7 |
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Senior Member
Join Date: Jan 2025
Location: Arizona in a van down by the river
Posts: 619
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Re: Radiator cap for a recovery tank system
I found the Ac Delco RC27 that looks like a match and has everything I need. I will give it a try. I do not think they even make a plain ol cap anymore that isnt flowback capable.
__________________
1972 C10 Custom Deluxe Highlander 402 Freedom isn't safe, it requires you to take responsibility for your own life, your own safety, and your own success. It carries with it the possibility of failure and the understanding that you're working without out a safety net. If you give the state the responsibility for any of these you also give up the freedom that accompanies the responsibility. |
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