10-22-2011, 12:24 AM
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#4 |
 Toyota Racing Development Join Date: Apr 2007
Posts: 5,038
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The jiggle valve isn't going to change whether you get heat or not and its presence isn't going to affect when the thermostat opens. Is the car getting up to normal operating temps in the normal amount of time? Coolant level normal? It may be a blockage in the heater core or a problem with the electrical and air routing system inside the dash.
EDIT: Sorry, I see you said it's running at temp just fine. Normal is dead center, for the most part. If you want to be sure grab the TSRM and measure the reading at the temp sensor directly and use the chart to find the temp it's at. I'd back-flush the system aggressively.
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