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The car is a 96 9000CS, converted to fpt, automatic, 97K miles.
I won't repeat the symptoms or half results; please refer to several threads beginning with "9000 overheat...".
1. The temperature sensor feeding the EDU (at the end of the cylinder head above the transmission), thus controlling the fan operation, is much smaller than the one feeding the ECU (between cylinders 2 & 3). So, there is no adapting one for the other. The temperature element of the smaller one is 12cm long, 5cm in diameter; the thread is 9cm fine, the thread came with tread-sealer applied, there is no gasket. The large one is 16cm*7cm, the thread is 11cm regular pitch; it has no thread sealers, there is a gasket.
2. R&R experience.
A. Removed the air-intake boot @ the throttle body, to facilitate disconnecting the electrical connector.
B. Disconnected the upper radiator hose at the cylinder head to gain access. This turns out to be not necessary.
C. Disconnected the upper heater hose at the cylinder head. This opens up the space; and the space faces the front of the car, gives me lots of room.
D. Cut the wire from the old sensor to allow the use of a socket wrench for removal (per Street's suggestion)
E. Hand-threading the new one in did not work due to the thread sealer. Used an open 19mm wrench, back and forth with the offset. Even though I have close to 90 degrees of turn; it seems to require more turns than I had anticipated.
Did the repair work? Of course it did. Otherwise this would not be the final report. Never realized that the noise made by a fan could be so musical!
The temperature gauge stayed at slightly below 9 o'clock no matter what. I waited like forever for it to turn on the first time around. The fan cycles between on and off after that (short on, long off) and the gauge never budged. I like to old system better.
Thank you for all the suggestions, support and hand-holding.
What a wonderful community!
posted by 98.164.220...
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