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2005 and 2007 5.7L losing coolant

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Old Mar 13, 2021 | 12:51 PM
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Red face 2005 and 2007 5.7L losing coolant

Our trucks are both losing coolant but cannot find any leaks. No coolant in oil. The coolant levels get low but engines do not run hot. Any ideas?
 
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Old Mar 13, 2021 | 04:26 PM
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Test coolant for combustion gases, you can get the kit for that at the parts store.
 
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Old Mar 13, 2021 | 04:53 PM
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Originally Posted by HeyYou
Test coolant for combustion gases, you can get the kit for that at the parts store.
Also rent a cooling system tester, which pressurizes the system without having to deal with the danger of heat or moving parts. Pump to max psi stamped on your radiator cap, then wait to see if it drips.
 
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Old Mar 13, 2021 | 08:04 PM
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Originally Posted by Dodgevity
Also rent a cooling system tester, which pressurizes the system without having to deal with the danger of heat or moving parts. Pump to max psi stamped on your radiator cap, then wait to see if it drips.
Thank you. I will give that a try as soon as I can.
 
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