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Nigel Tufnel Wannabe
tchudy's Avatar
Join Date: Sep 2011
Location: Channahon, Il
Posts: 216
Coolant Temp Gauge Fail

Just recently rebuilt my 86 944T engine and I do not have a working temp gauge. Sending unit is new and I soldered new spade connectors when I had the harness out. I checked the gauge using the procedure on Clark's garage and no luck so either the gauge is bad or the wiring is bad. I'll have to sort it out.

I had been planning to install an aftermarket gauge at some point so I went ahead and ordered it. Question: Can I attach the new gauge to the existing new sending unit I just installed or should I install the sending unit from the new gauge? (I'm concerned about fitment of the new sending unit.)


1986 Porsche 944 Turbo, Sapphire Metallic. Nice restoration. I'm done spending $$$$ on this car. Ha,'ll never end!
Old 03-10-2014, 07:28 AM
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plays with toy cars
sausagehacker's Avatar
Join Date: Jun 2012
Location: Houston, TX
Posts: 503
The sending unit gives resistance readings based on temperature:

The gauge you use will need to work on this signal, or be able to be modified to do so. I know you have a late dash, but what do you think about this combo?

VDO temp gauge

Associated sensor

I'm not sure if the sensor would directly mount into the hole in the head where the old one was, you may need an adaptor.

1983 944 - modded everything

'86 951 - under construction
Old 03-10-2014, 10:10 AM
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