1998 LS400 Thermostat Jiggle Valve
#1
Driver
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1998 LS400 Thermostat Jiggle Valve
Hi, I'm new here--just bought my first Lexus vehicle last week from a private party.
I replaced the thermostat today on my 1998 LS400--the old one was stuck open.
I have the Lexus Repair Manual for this car and noticed something in the instructions on installing the replacement thermostat: the positioning of the "jiggle valve" on the thermostat.
However, the replacement thermostat I bought ($12 at Autozone) I notice did NOT have a jiggle valve. (Yet the thermostat packaging claims to be fully compliant with OEM specifications--go figure.)
I went ahead and installed it anyways and it seems to be working properly so far.
Should I take it out and replace it with one with a jiggle valve? I should of bought OEM--sigh.
Or should I just drill a 1/16th to 1/8th hole in the thermostat I bought?-- a drilled hole where the jiggle valve would be located.
Any help would be greatly appreciated, thanks!
Jennifer
I replaced the thermostat today on my 1998 LS400--the old one was stuck open.
I have the Lexus Repair Manual for this car and noticed something in the instructions on installing the replacement thermostat: the positioning of the "jiggle valve" on the thermostat.
However, the replacement thermostat I bought ($12 at Autozone) I notice did NOT have a jiggle valve. (Yet the thermostat packaging claims to be fully compliant with OEM specifications--go figure.)
I went ahead and installed it anyways and it seems to be working properly so far.
Should I take it out and replace it with one with a jiggle valve? I should of bought OEM--sigh.
Or should I just drill a 1/16th to 1/8th hole in the thermostat I bought?-- a drilled hole where the jiggle valve would be located.
Any help would be greatly appreciated, thanks!
Jennifer
#7
Driver
Thread Starter
I went to return the aftermarket thermostat and I told the clerk it did not have a jiggle valve. She pointed out it did and showed me it. Sure enough, it was on the inner disc hidden under the cross member instead of the outer disc edge.
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#8
Lexus Champion
just make sure when you reinstalled it that the "jiggle valve" or air bleeder hole was in the 12'oclock position, as in billydpowe's diagram above!
Last edited by LScowboyLS; 01-26-13 at 04:54 PM.
#9
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1998, 1999, 35, gs300, heater, jiggle, lexus, ls400, position, positioned, removal, replace, replacement, thermostat, valve