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hothead · 01-02-2005, 02:35 PM

Here is a Technical Service Bulletin (TSB) issued by Toyota I found

TSB: 029032787 22R-E Engine Temperature Overshoot
It says:
Some 1984 pickup trucks and 1983-1984 Celica models, equipped with 22R-E engines, may experience a condition called "temperature gauge overshoot". After starting a cold engine the temperature gauge will indicate a higher than normal engine temperature for a short time just prior to the thermostat opening. After the thermostat opens, the temperature gauge will return to the normal range. A new double valve thermostat has been made available to reduce temperature gauge overshoot.
And calls for part number 90916-03070 which according to the TSB replaces 90916-03055.
Not sure why they say this only affects 83-84 engines.

01-02-2005, 02:35 PM	#4 (permalink)
hothead Registered User Join Date: Feb 2004 Location: Vancouver Island, Canada Posts: 1	Here is a Technical Service Bulletin (TSB) issued by Toyota I found TSB: 029032787 22R-E Engine Temperature Overshoot It says: Some 1984 pickup trucks and 1983-1984 Celica models, equipped with 22R-E engines, may experience a condition called "temperature gauge overshoot". After starting a cold engine the temperature gauge will indicate a higher than normal engine temperature for a short time just prior to the thermostat opening. After the thermostat opens, the temperature gauge will return to the normal range. A new double valve thermostat has been made available to reduce temperature gauge overshoot. And calls for part number 90916-03070 which according to the TSB replaces 90916-03055. Not sure why they say this only affects 83-84 engines.