Quote:
Originally Posted by DenverAirport
Yep. Recently replaced it with a new OEM and it's in the 6 o'clock position. From what I've read the jiggle valve is actually supposed to be in the 6 not 12 (many complain that 12, common procedure in other vehicles, leads to higher engine temps in this truck and some other Toyotas)
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All that jiggle valve does is help to release the air initially. Once the system is purged it really doesn’t do a whole lot. We used to drill tiny holes into the thermostats to help bleed the system is easier back in the day.
It has no function other than to assist in burping air out quicker. I’m not a 5vz expert by any means, but I would really have to question that one hard. Once that thermostat opens and assuming the pump is working, air cannot exist at that point in the system as it is one of the lowest points in the system.