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Member
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Join Date: Nov 2015
Location: Western suburbs of Chicago
Age: 59
Posts: 210
Real Name: Bill
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Member
Join Date: Nov 2015
Location: Western suburbs of Chicago
Age: 59
Posts: 210
Real Name: Bill
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A salute to the jiggle valve
I decided to do a semi controlled experiment.
I had the feeling from reading on this excellent and informative forum that the jiggle valve in my coolant thermostat was at 12 oclock instead of 6 oclock. I bought new Toyota red coolant and a new 82C OEM thermostat to put in. After draining the green stuff and pulling the thermostat (sure enough the jiggle was at 12 o'clock) I decided that because everything looked clean I would save the new thermostat, flush and change to red, and instead refill with fresh green and reinstall the old thermostat as it looked good and was an exact (maybe original) match to the new one. Whamo! At running temp I went from 198°-208° with the heat on to 189° steady with the heat off! why does this happen? I don't have a clue. The only thing that changed aside from fresher coolant (the coolant had been in for 19k miles) was that almighty jiggle valve at 6 oclock instead of 12!!
Sorry for the long winded story but...You've done it again jiggle valve!
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'97 T4R LTD 4WD desert dune, bone stock, factory E-locker, RS3000, Scangauge II, Hella 450's, 191k
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