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Old 04-17-2016, 09:28 PM   #9
mongocanfly
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Join Date: May 2015
Location: Alabama
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Re: Ls swap coolant system help

The way I did mine was remove top hose from radiator, , fill radiator full,,put cap back on,, then holding up the top hose fill the engine full reattach hose,, mine has a overflow tank on it so I added some in there as well. From there I just cranked it up and let it idle until it got up to temp and thermostat opened,, you can tell for sure it opens when top hose suddenly gets hot,, fans kicked on,, I made sure I didn't have any leaks so I drove it down the road,, let it cool down then checked radiator level..if I didn't do it this way the water temps would climb very fast and it wouldnt circulate due to air pocket in engine..
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