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Coolant temp sensor?

Old Sep 26, 2016 | 01:52 PM
  #1  
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Coolant temp sensor?

I know there's been several threads on this, but I'm hoping to find some recent info as the threads I found are old.

From my understanding when you replace the coolant temp sensor you have to make sure you get the right one, or no dice. So I stopped by the stealership and talked to them. They said there's one "for the computer" which was $22 and the other for the gauge, which is $84.

I'm assuming the one I need to replace is the $84 one, as my gauge is flat.

And that's too rich for my blood...

So, I'm looking around on rockauto, and I see a handful of different ones. Anyone got one off of there recently and know if it works or not? Got a part number?

I was gonna get one from Advance near here, but they said they wouldn't return it if I installed it and it didn't work (seriously?).
 
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Old Sep 26, 2016 | 02:45 PM
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Originally Posted by Oldanvilyoungsmith
one "for the computer" which was $22 and the other for the gauge, which is $84.
$22 is for Manual Transmission Equipped / $84 is for the Automatic Transmission Equipped.

I'm sure you can cross reference the sensor to determine what's available.
 
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Old Sep 26, 2016 | 05:36 PM
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This is a confusing situation and I finally got it squared away in my head a while back. Here's a cut and paste from that thread:

"Sensor that sends coolant temp to the dash (ECT) is part number F65Z-10884-AA aka SW-5130 aka 36447 when found at Advance, Amazon etc. Mounts on top of water pump. All trucks the same on this one.

Sensor that sends engine temp to the PCM (EOT) is part number 3F1Z-12A648-A aka DY-1144. This same sensor is mounted in two different locations depending on transmission. Naturally, of course, why not. On autos it is on the back of HPOP, but on manual trucks it is mounted above CPS."

In this application the 12A648 sensor is sensing oil, but in other applications the same sensor is used in coolant. Another wrinkle.
 
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Old Sep 27, 2016 | 10:15 AM
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Thank you very much! That's exactly what I was looking for. I must have missed the thread it came from.

$14 from rock auto sure beats $84 from the stealership.
 
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Old Sep 27, 2016 | 03:14 PM
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Originally Posted by Oldanvilyoungsmith
Thank you very much! That's exactly what I was looking for. I must have missed the thread it came from.

$14 from rock auto sure beats $84 from the stealership.
That was my line of thinking too until I put the new auto parts store one in and it still didn't work. Got one from the stealership and all is well.
 
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Old Sep 27, 2016 | 05:00 PM
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I had a cheapy off of flea bay fail on me as well. The consensus around here is OEM on sensors, there are too many reports of problems with aftermarket stuff.
 
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Old Sep 28, 2016 | 01:23 AM
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Some manufacturers make both after market and OEM. The whole process is different. The spec's and contracts for OEM are pretty detailed and there can be an inspection and reporting requirement that goes along with those parts, so that along with all the markups to make it worthwhile to do makes for a higher price.

But when you as an owner decide to buy a non-OEM, you are stepping outside to kind of a black market. You are saying I don't care about all that mumbo-jumbo, just give me the part. Sometimes that works, many times not, because the manufacturer is not going to give you the same quality, if he (the vendor) is not getting paid to produce quality. It is a process that folks who work in manufacturing intuitively understand, most of us don't.

And often, even the OEM parts can fail frequently (Takata air bag actuators) or certain computer manufacturers who use reverse auctions to source parts like hard drives, power supplies etc. Reverse auctions guarantees lowest price for the purchaser, does not necessarily deliver good quality, but they are very common in industry.
 
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Old Sep 28, 2016 | 08:16 AM
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Is this better? [LINK]

I have a manual transmission block I'm working on, and the sensor to the PCM has a stud connector, where the dash gauge sensor has the fancy Ford connector.
 
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Old Sep 28, 2016 | 12:08 PM
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Originally Posted by Tugly
Is this better? [LINK]

I have a manual transmission block I'm working on, and the sensor to the PCM has a stud connector, where the dash gauge sensor has the fancy Ford connector.
You can use two of the same sensors for a manual as well with the two pin connectors. There are 3 locations for water temp that can be used which only 2 for a manual would be necessary. The timing cover has a spot in the upper pass side (which has the sensor with stud) while the water pump has 2 spots which use 5V sensors. The top sensor hole is typically used for auto and manual can use both top and side. OR manual can use the top and then the sensör off to the upper pass side.

Hows that for confusing?!
 
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