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Old 10-05-2017, 09:30 AM   #2
underthehood
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Join Date: May 2008
Location: Rockford IL area
Posts: 2,350

1999 SL2
2004 VUE 2.2L
Default Re: 19999 SW1 temp gauge behaving oddly after radiator replacement

First and foremost pressure test the cooling system. If you don't you're just pi$$ing into the wind. Once you affirm the system can hold pressure buy a new pressure cap for the coolant tank. Cheap insurance. Properly bleed the cooling system to be sure all air is out.
Odds are (other than the hissing) it's now just operating normally now that the ECTS is fully covered in coolant and there is no air leak into the system

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2006 Toyota Highlander (rare 4 cyl AWD)
2001 Toyota Highlander V6 AWD creampuff
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