resistance value for oil temp sensor @ temp?

I had a similar problem with mine,it would read then it would be dead then read and so on.I removed it and checked for resistance with the sender in a pot of water over the stove and it was open circuited.I replaced it with one from Superformance for $30 and its been perfect since.
http://www.superformance.co.uk/parts/1567a_246_oil_water_temp_senders.jpg

 

Sean,

Here are the readings I took off my 328 sender earlier this year. I would imagine it's the same part for your car. Based on my readings, 170 degrees F (77 degrees Celcius) should equal about 325 ohms of sender resistance. Excess resistance anywhere along the way from the sender unit to the back of the oil temp. guage will cause the guage to show a cooler temp. than in reality. You might want to check all the wires/connections along the way (if the sender unit checks good).

http://www.wbuf.noaa.gov/tempfc.htm
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