1967 corvette temp sender

[Jack H.]

Re: 1967 corvette temp sender

If you lay the various JG books side by side, you'll see different descriptions of 'correct' emboss for different model years. The two factors are: (1) upright or inverted text, and (2) '12 Volt' vs. '12 V'.

I've gathered maybe 200 original AC temp senders from various scrap yard cars over the years and I've see all four variations which appear to be quite random with respect to the model year of the donor car they came from...

With GM producing millions of vehicles each year, I find it rather hard to 'swallow' that there was only ONE emboss machine and one 'correct' emboss sequence that changed from year to year!

As far as the pre/post amble sequence (dots or stars), that aspect varies too...

[Jim V.]

Re: 1967 corvette temp sender

Tim, just went thru this exercise. Pictured below is 1965 original on left and Wells TU5 on right. Obvious differences...no AC script, different rubber insulator diameter, different height of raised area above hex...

I benchmarked t-gauge with Radio Shack resisters then mapped ohms ranges in water on my original and two TU5s. My TU5s varied quite a bit even from each other. I picked the TU5 which was the closest up at the operating range 200F. Verified gauge with IR gun after installation. All's good, except I still have my original problem of overheating at speed. My next step, new radiator.

Also, note my original script is right side up. Original has three dots after the "12 volts" script. I believe this dot system identified different ohm ranges.

JimV