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Old 05-29-2019, 01:54 PM
JohnMc JohnMc is offline
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JohnMc JohnMc is offline
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Join Date: Jul 2011
Location: St. Louis
Posts: 1,072
JohnMc is a name known to all JohnMc is a name known to all JohnMc is a name known to all JohnMc is a name known to all JohnMc is a name known to all JohnMc is a name known to all
You can also rent a combustion gas tester for free from Autozone (and stores like that) - just buy the tester fluid. It will test for combustion byproducts in the cooling system.

https://www.autozone.com/loan-a-tool...ter/391378_0_0

Let the bubbles go through the tester, if the fluid changes color, it's a bad HG.

When a HG gets bad enough, it's easy to tell. It's those marginal failures that can be harder to diagnose. Sometimes they only leak when it's hot. Or you have it floored. Or both.
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'99 Highlander 5-spd manual e-locker no-running-board
SS 3" suspension lift/1" body lift/33" tires/'Snowflake' TRD Taco wheels/231mm Tundra brakes/bumpers/armor/sliders/winch/Sherpa Matterhorn rack
Manual front hubs, NWF Eco-crawler transfer case doubler, second gas tank
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