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1 Week Ago
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#1 |
 Join Date: Jan 2024
Location: Hawaii
Posts: 13
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Radiator Cap
I am looking to buy a new radiator cap for my 90. The cap currently on there is an AC Delco 17 psi., HC-44 with two ears on the side. It looks very old and the rubber is deteriorating. I see an AC Delco RC 81 on rock auto for sale. this RC 81 has a 15 psi rating and no ears on it for turning. Any suggestions? What s the best cap and rating to buy?
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1 Week Ago
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#2 |
 Join Date: Aug 2006
Location: McLean, VA
Posts: 3,703
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Re: Radiator Cap
Below, I believe, is what came with the car and replaced with the same about 10 years ago. AC-Delco 15 psi.
https://www.ebay.com/itm/29509399874...2f7a7800fb2068 |
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6 Days Ago
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#3 |
 
Join Date: Jul 2015
Location: Jerica - SPAIN
Posts: 216
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Re: Radiator Cap
Hi! You have AC Delco RC44 17psi available in Summit Racing (there are two other 17 psi caps from Griffin Radiators brand)
I don't know if it's good for our LT-5's the 15 or 16 psi caps. Service manual and technical information specifies 17 psi caps.
__________________
 1.990 Chevrolet Corvette ZR-1 #2342 - Black/Black - March 1.990 - OBX Headers and OBX complete Exhaust Line (No Cats). K&N Air Filter with open Air Box. Jerry's Gaskets Silicone Air Duct. DeWitts Two Row Pro Series Radiator. Samco's Hose Coolant Kit. ECM/EPROM Improved. MSD Spark Plug Wires 8,5mm Super Conductor. EBC Brakes YellowStuff with EBC D-Series Rotors and Raybestos hoses. |
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6 Days Ago
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#4 |
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Join Date: Jul 2015
Location: Jerica - SPAIN
Posts: 216
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Re: Radiator Cap
When you select "1990 Corvette" to check the caps suitability only appear AC Delco RC44...
__________________
1.990 Chevrolet Corvette ZR-1 #2342 - Black/Black - March 1.990 - OBX Headers and OBX complete Exhaust Line (No Cats). K&N Air Filter with open Air Box. Jerry's Gaskets Silicone Air Duct. DeWitts Two Row Pro Series Radiator. Samco's Hose Coolant Kit. ECM/EPROM Improved. MSD Spark Plug Wires 8,5mm Super Conductor. EBC Brakes YellowStuff with EBC D-Series Rotors and Raybestos hoses. |
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6 Days Ago
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#5 |
 
Join Date: May 2010
Location: Japan
Posts: 3,543
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Re: Radiator Cap
I know stock is 17 lb cap, but I have been running this Mr.Gasket one for as long as I can remember, but they were half the price then. It is 16 lbs and never had a problem. If you only want stock sorry and please disregard. They come in red and blue too. Don?t mind me I?m always different. 😂🤙🏼
https://www.jegs.com/i/Mr-Gasket/720/2476BK/10002/-1
__________________
Craig "ZR-1 NO KA 'OI" "ZR-1 ICHIBAN" 1995 #228 Black/Black with Dunn Heads ZR-1 owner since September 2003 ZR-1 Net Registry Founding Member #0074 NCM Lifetime Member #2048 
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5 Days Ago
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#6 |
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Join Date: Jan 2024
Location: Hawaii
Posts: 13
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Re: Radiator Cap
Thanks for the help
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