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Don't wanna BLOW coolant system! 23 psi for Pressure Leak Test? Forums > > Don't wanna BLOW coolant system! 23 psi for Pressure Leak Test? Don't wanna BLOW coolant system! 23 psi for Pressure Leak Test?
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  #1  
Old 03-29-2021, 09:39 AM
windnsalsal windnsalsal is offline
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1998 Quest
 
Join Date: Jan 2020
Posts: 1
Question Don't wanna BLOW coolant system! 23 psi for Pressure Leak Test?

I don't want to blow the coolant system! Is much higher 23 psi rating true?

Please help! My pressure leak testing is delayed only because I found differing PSI numbers for the radiator SYSTEM. I will be using the Powerbuilt tester loaned from Autozone. I found the following numbers from various sources below:

...Leakage Test Pressure 157 kPa (23 psi), Cap Relief Pressure 81-109 kPa (11.8-15.8 psi) from sources:
+Villager [Chilton online via public library]
+Quest: [Chilton online via public library: can't seem to find spec]
+Quest: [FSM [factory service manual]


...16 psi???
+Haynes book for Quest/Villager, which didn't see mention of 23 psi:
page/section 3-1 "radiator pressure CAP rating" = 11.8-15.8 psi
page/section 1-2 "radiator CAP pressure rating" = 16 psi


Printed psi on cap itself:
+current on van: no spec. I don't know if OEM or 3rd party
+Oreilly, Autozone: 13 psi
+dealer: cap no longer available and no spec
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  #2  
Old 05-27-2022, 09:12 AM
Luther81 Luther81 is offline
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2004 Quest
2008 Titan King Cab
 
Join Date: May 2022
Posts: 2
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relax, and dont worry about too much about pressure, if your using a hand pump coolant pressure tester. Just test the system hot, after up to temp, place plenty of rags and use glove to slowly open Rad cap, SLOW... then pressureize it hot. @20 psi will be good. Most leaks can be found hot engine. Let sit @20 psi, if it starts dropping, make sure the tools isn't whats causing the pressure leak down, BECAUSE, loaned out tools get damaged from other users messing them up. Look for leaks or pressure drop off. Leak could be inside vehicle, inside engine, or hitting something and burning off, use a repair shop if you having trouble.
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