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Oil Temp Gauge/Sender...

I've noticed that my oil temp gauge reads no less than 60-C [or 140-F] when cold. I have supplied a picture of what my gauge indicates when I first turn the key in the morning... Outside temp is in the 50's, but my car is indicating 140-F.

I've only had the car for a short while, and don't know if it was like that for the past couple of months...

The temp reading does go up as i drive the vehicle. But, i'm not convinced that it is giving me an accurate reading.

My question is:

Where is the Temperature Sensor located?
What is the part number? [I have a repair manual, but cannot seem to locate the part]
Is it easy to get to?

Thanks
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LIVN80S - - Red '79 Porsche 930 Steel Slant Nose Conversion [in 1987] w. 46k miles 3.3L; 964 Cams; K27HF @ 1.0 BAR, with Garrettson Intercooler; Rarly Zork; CIS Flowtech Fuel Head & BL-WUR.
Old 12-21-2008, 04:41 PM
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The guage temp sensor is in the front right side of the engine bay not far from the pressure sensor (front, right) Could the needle be misplaced on the pin?
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Old 12-21-2008, 05:55 PM
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I don't think the needle is misplaced because it "jumps" to that position as soon as the key is turned on...

Before that, it's out of site in the "6:30" position...
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Old 12-21-2008, 06:26 PM
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does someone have a picture of the sending unit and it's position?
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Old 12-21-2008, 06:27 PM
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The two gauges you show take different sending units. On the right picture, there should be a small hash mark at about 9:00 to denote 212*F.

The sending unit us located on the right chain housing (vertical portion, A/C side). A wire with two spades goes to it.

A search of the pelican catalog will show what and where.

Last edited by A930Rocket; 12-21-2008 at 06:53 PM..
Old 12-21-2008, 06:50 PM
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I used a repinned 3.2 harness on my car, but my temp sender is a single pole unit between the oil-pressure sender and the rear motor mount on the block.
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Old 12-22-2008, 06:38 AM
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You might be right. I'm working off a short memory....

Quote:
I used a repinned 3.2 harness on my car, but my temp sender is a single pole unit between the oil-pressure sender and the rear motor mount on the block.
Old 12-22-2008, 12:04 PM
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Ok, this is the gauge/value i'm getting as soon as I turn on the the key [no matter how cold it is outside and how cold the engine/oil temp is].



This is the "lowest" my temp reads...

I've seen the temp sensor on the on the chain housing. I thought that was another sensor... I saw it listed with PP, but, thought that must be something else...

If that's it, then, i'll short the two leads out to see if it affects the gauge. If so, then I'll order another one.

thanks - shannon
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Old 12-22-2008, 04:34 PM
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Is it this sensor?

Timing Chain Temp Sensors
This sensor measures the temperature at the engine's timing chain cover on the left side. Interestingly enough, this switch also has positive current going to it, which makes it act as a small heating element as well. It only stays powered during cranking and the heating element signals it to stop sending power to the cold-start valve if the engine does not start after much cranking -- to avoid flooding the engine.


911-617-117-00-M100 Thermotime Switch on chain cover, 911 (1974-83), 911 Turbo (1976-85)
Brand: Genuine Porsche

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Old 12-22-2008, 04:54 PM
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Quote:
Originally Posted by A930Rocket View Post
You might be right. I'm working off a short memory....
Don't worry- I forget where the steering wheel is sometimes.
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Old 12-22-2008, 05:33 PM
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No. That's on the left side. The one you want is on the right (passenger side).

Try 901-641-632-00-m100 on page 11 of the 911 and carrera oil circulation section. That's a sending unit for a numerical temp gauge.

Quote:
Is it this sensor?




Timing Chain Temp Sensors

This sensor measures the temperature at the engine's timing chain cover on the left side. Interestingly enough, this switch also has positive current going to it, which makes it act as a small heating element as well. It only stays powered during cranking and the heating element signals it to stop sending power to the cold-start valve if the engine does not start after much cranking -- to avoid flooding the engine.

Last edited by A930Rocket; 12-22-2008 at 06:43 PM..
Old 12-22-2008, 06:22 PM
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I see my mistake as far as the side goes - - thanks

however, i'm still confused as to the type of gauge i have. my understanding is that my gauge does not have numbers on it [at least not easily seen].

the numbers on my gauge are hidden to the far left. you have to look on steep angle to see them.

will this sender [the one you suggested] work with my gauge?
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Old 12-22-2008, 06:51 PM
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OK, i think i found it on page 12 - part number:

911-606-112-00-M100 for $32 plus seal...

thanks
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Old 12-22-2008, 06:55 PM
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You need the sender and gauge face to be accurate. The come as a kit, but it looked like pelican is out. You might try NH Speedometer in CA.

The numbers with the stock gauge on the left side are in *C and you want *F.

Quote:
I see my mistake as far as the side goes - - thanks



however, i'm still confused as to the type of gauge i have. my understanding is that my gauge does not have numbers on it [at least not easily seen].



the numbers on my gauge are hidden to the far left. you have to look on steep angle to see them.



will this sender [the one you suggested] work with my gauge?
Old 12-23-2008, 05:21 PM
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i already ordered the sender from PP.

I'll see about the matching gauge from NH Speedometer. First, i'll prob. just install the sensor and see what difference i get in the readings.

thanks - shannon
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Old 12-23-2008, 06:51 PM
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