72 TA : New Project

[njsteve]

Rick,
I dug around and found some better old ones in the toolbox than I had on the car and reinstalled the shocks (nice and quiet for the moment) but if you have some new ones that would be much better!

[njsteve]

I threw some info out there on the Temperature Sender thread and thought I'd repost it here as well.

https://www.yenko.net/ubbthreads/ubbt...6&page=all

Since it is really expensive to find an original, vintage Delco temp sender that reads correctly, the Wells brand from your local AutoZone ended up being the best and closest calibrated bet. And at $6, it sure beats the hundreds that some people want for an original 1513321. Note: the later Delco replacements are not calibrated correctly and as a result the temp gauge reads way too high - which is the same problem exihibted by the Lectric Limited sender I tested.

Here is the chart I made up comparing the $6 Wells TU5, the $25 Lectric Limited, and a vintage GM 1513321 temp sender. The test was done with a pot of water on the stove. The senders were immersed to the top of the threads and then tested with an ohm meter once the water temp stabilized at each temperature level.

80 degrees: Wells at 650 ohms, LL at 573 ohms, GM at 549
90 degrees: Wells at 526 ohms, LL at 445 ohms, GM at 524
100 degrees: Wells at 429 ohms, LL at 365 ohms, GM at 409
110 degrees: Wells at 328 ohms, LL at 266 ohms, GM at 365
120 degrees: Wells at 283 ohms, LL at 227 ohms, GM at 323
130 degrees: Wells at 250 ohms, LL at 200 ohms, GM at 272
140 degrees: Wells at 216 ohms, LL at 170 ohms, GM at 227
150 degrees: Wells at 198 ohms, LL at 155 ohms, GM at 195
160 degrees: Wells at 173 ohms, LL at 133 ohms, GM at 175
170 degrees: Wells at 157 ohms, LL at 119 ohms, GM at 157
180 degrees: Wells at 135 ohms, LL at 101 ohms, GM at 140
190 degrees: Wells at 120 ohms, LL at 89 ohms, GM at 125
200 degrees: Wells at 109 ohms, LL at 79 ohms, GM at 109
212 degrees: Wells at 104 ohms, LL at 75 ohms, GM at 102

[mockingbird812]

Nice job &quot;Mac&quot;. So from what I see in your results, the el cheapo Wells brand stayed fairly close with the OEM GM sender (except at 80 degrees . [img]<<GRAEMLIN_URL>>/hmmm.gif[/img] ) How do these two compare visually?

[njsteve]

The Wells is an exact duplicate except there is no stamped Delco or part number on it. Only the original GM/Delco units have any words stamped on them at all. The more recent GM/Delco senders have nothing on them at all which leads me to believe that they have some outside manufacturer making them to some universal, one-sender-fits-all spec.

Here are two vintage Delcos on the left, then a correct old NOS Delco sender with the stampings and a more recent (inaccurate) Delco sender with no stamping, on the right:



Close up of some vintage Delco senders with the &quot;AC MADE IN USA&quot; stamping:



By the way, these are other peoples' photos - I don't have any of these senders. A Pontiac buddy just sent me the one that I tested and that one I put in the car.

[iluv69s]

I hope my car turns out even close to this nice...!!
Great Job!!

[njsteve]

Finally got the polyethylene valance back today. All that relocating and modifying paid off in the end - it actually fits without any binding, stretching or shoving into place. Just hand-tightening of the large washered bolts to hold it in place.

Here is a shot of the finished valance:

[njsteve]

And one of the major modifications, which was to add almost a 1/2 inch of reinforcement material (urethane bumper repair material) to the outer edges. Due to bad molding of these parts at the factory, the outer edges were at best, 1/64 of an inch thick and brittle as glass. The polyethylene valance was a great visual design but very poorly executed. That was why the vast majority were replaced by the visually different, stamped steel valance under a blanket warranty/service bulletin.



The other major modification was to fill all of the existing mounting holes and then redrill them in the correct locations so they would actually line up with the factory mounting positions on the radiator support. Some of the holes in the valance were over an inch away from their mounting points. The assembly line gorillas didn't care, so they would just shove the valance into place and make the bolts hold it there, til the car rolled to the end of the assembly line and the valance shattered once the car hit the first bump - usually the ramp onto the delivery truck.