 Troubleshooting oil temperature circuit |
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| reynoldslh |
 May 9 2025, 11:44 AM
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#1
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Newbie  Group: Members Posts: 4 Joined: 2-October 23 From: Portugal Member No.: 27,623 Region Association: Europe  |
I am trying to troubleshoot what I think is a lazy temperature gauge response on my car (European 1973 914-4 with combo instrument) which has been in storage for far too long.
The temperature needle does not go above about 1/4 way across even with the engine warm. Either that´s normal, or the gauge is out of calibration, or there is a problem with the sensor, or possible combination of all of the above. What is the expected resistance range of a working temp sensor in the sump? I suspect its the long snout type 200C sensor which is fitted since the taco plate has the angled sensor mount. Also how to test the temperature gauge itself? |
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| Superhawk996 |
May 9 2025, 01:14 PM
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#2
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914 Guru Group: Members Posts: 7,221 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch 
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Pretty normal for an early gauge with the proper 200C sender
Combo (see Fig 3) Test via boiling water or in oil with secondary thermometer. |
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Posts in this topic
reynoldslh Troubleshooting oil temperature circuit May 9 2025, 11:44 AM
Superhawk996 Duplicate May 9 2025, 01:13 PM
reynoldslh
Pretty normal for an early gauge with the proper ... May 10 2025, 06:24 PM Lockwodo The oil temp gauge on my ’74 2.0 barely moves wh... May 9 2025, 01:48 PM 914Sixer CHECK wire from sender to plug under battery shelf... May 9 2025, 01:48 PM reynoldslh
CHECK wire from sender to plug under battery shel... May 10 2025, 06:30 PM emerygt350 Same here. Only time the gauge moves up past 1/4 ... May 9 2025, 02:37 PM 930cabman Confirm with an infrared point/shoot May 9 2025, 04:31 PM bkrantz Yup. Stock "normal" looks low, and take... May 9 2025, 07:16 PM reynoldslh Thanks to all for confirming that my temperature g... May 10 2025, 06:35 PM |
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