 Temperature Sensor, Anyone know the resistance? |
|
|
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
|
  |
| billd |
 Mar 14 2006, 11:53 AM
Post
#1
|
|
Member  Group: Members Posts: 327 Joined: 25-May 05 From: Palo Alto, CA Member No.: 4,145  |
My temperature gauge always reads at the left extreme of the scale. While I'd like to think my engine is always running cool, I don't believe it.
I measured the sensor. It measures 2.3K ohms cold and 300 ohms hot. I checked the gauge. 300 ohms barely moves the needle. It takes a resistance of 50 ohms to get to full scale. Does anyone know what the correct resistance range is? I suspect I have the sensor for the aftermarket VDO gauge hooked up to a stock gauge. Pelican wants $30 for an OE senso while the aftermarket VDO sensors at $10 at Summit. Anyone know a less expensive solution? It would be cheaper to replace the gauge - the VDO gauge is $25 at Summit, but the 2.062 inch gauge won't fit into the 60mm hole (2.362 inch) in my center console. |
   |
 
|
| toon1 |
Mar 14 2006, 12:04 PM
Post
#2
|
|
Senior Member Group: Members Posts: 1,849 Joined: 29-October 05 From: tracy,ca Member No.: 5,022 |
the Pennington book say's, 3k when cold, 1k when warm, engine temp sensor
|
|
|
|
| billd |
Mar 14 2006, 06:58 PM
Post
#3
|
|
Member Group: Members Posts: 327 Joined: 25-May 05 From: Palo Alto, CA Member No.: 4,145 |
If this is true, then I suspect my gauge is bad - although that's an unusual failure mode for a galvanometer.
Anyone have a nice looking solution for the 2 1/16 inch gauge in the 60mm hole? |
|
|
|
| lapuwali |
Mar 14 2006, 08:03 PM
Post
#4
|
|
Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743  |
You can make a new front panel for the center console fairly easily, and redrill the holes to be any size you like.
You can also make a sleeve out of wood with a 60mm OD and a 52mm ID. You can send the gauge to PA Speedo to get it fixed and calibrated. |
|
|
|
| bd1308 |
Mar 14 2006, 08:13 PM
Post
#5
|
|
Sir Post-a-lot Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501 |
maybe the guage sender wire is grounding out somewhere?
b |
|
|
|
| billd |
Mar 15 2006, 05:41 PM
Post
#6
|
|
Member Group: Members Posts: 327 Joined: 25-May 05 From: Palo Alto, CA Member No.: 4,145 |
egauges.com lists 10-180 ohms as the resistance range of a VDO temperature sender. If this is true of the stock sender, then my gauge is about right and I just need a new sender. I've ordered the aftermarket sender from Summit ($10) and will see if this works.
|
|
|
|
| BMartin914 |
Mar 16 2006, 08:09 AM
Post
#7
|
|
||| Group: Members Posts: 1,408 Joined: 30-May 04 From: Oregon Member No.: 2,128 Region Association: Pacific Northwest |
You need to make sure that you get a sender that matches your gauge. The older gauges use a hotter sender, the later ones a cooler one.
The older senders are NLA, and what is being made new are 150' C senders. If your gauge pegs at 300' F, this is what you want. If you have an older gauge, the 150' C sender will not be accurate. *All of this information is assuming you are referring to the oil temp sender* |
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 9th May 2024 - 06:29 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.