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Move coolant temp sensor

Old 08-14-2011, 12:17 PM
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Default Move coolant temp sensor

I want to move the coolant temp sensor to the passenger side head and run the sensor for the gague on the drivers head this will fit the way my car is wired better. Has anyone done this or is there any issues with moving the CTS ? I can't see where this would make any difference and would clean up some wireing . Stan
Old 08-14-2011, 12:36 PM
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Default move temp sensor

Thats what I did with mine.....no issues after more than 2 years of driving.
Old 08-14-2011, 12:43 PM
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Thanks thats the answer I'm was lookin for. Stan
Old 08-14-2011, 01:52 PM
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FWIW I've heard that moving the PCM's coolant temp sensor to the passenger head is a bad idea, but I haven't heard specifics on why.
Old 08-14-2011, 07:49 PM
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Originally Posted by nissan 570sx
FWIW I've heard that moving the PCM's coolant temp sensor to the passenger head is a bad idea, but I haven't heard specifics on why.
Why?

Coolant in the pass cyl head BETTER be the same temp as the drivers side or you'll have problems
Old 08-14-2011, 10:04 PM
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Heat soak in the sensor..there's your problem.

Look up GM part 12551708.
Old 08-14-2011, 10:48 PM
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Might affect the reading on a 4th gen f-body where the engine his stuffed in there half under the dash. I don`t think it will matter on a swap car though where there is more room around the motor.
Old 08-15-2011, 12:07 AM
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Originally Posted by the_merv
Heat soak in the sensor..there's your problem.

Look up GM part 12551708.
What a load. Its a mercury filled brass fitting, ambient temps do not affect it. The PN listed is quite useful for swaps because the gauge sender is built in, but heatsoak, being shrouded, etc is nonsense
Old 08-15-2011, 01:31 AM
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Dont ask me man, just goin off of what other people said. I used the 3-wire one and had no issues.

I dont kno about the mercury tho..we had one break on us the other day and there wasnt any mercury in it..fwiw..
Old 08-15-2011, 01:49 AM
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Temps in the passenger side passage are a couple degrees higher. Not that it will matter much. My GM ECT sensor was in the stock location and would read 3-5 degrees lower than my Dakota digital sender. As long as you don't have cooling problems it won't be an issue.


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