External T-Stat Bad? - Page 2

Ayles · 07-13-2018, 10:41 AM

Please let me know your IR readings! Mine are listed above and deviate quite a bit from what I was seeing on the gauge.

Here is the sender I removed:

SCadaddle · 07-22-2018, 11:18 AM

Hey Ayles,

How did replacing the oil temp sender work out for you? Are you getting a significant difference in the indicated temperature by swapping out the 150C unit to the 200C unit?

Ayles · 07-22-2018, 11:25 AM

I havent driven it yet! Hopefully can get it out today and I will report back.

Ayles · 07-23-2018, 06:33 PM

Ok, just drove for bit. Car reads first white tic or what I understand to be 195. Temp of the engine seems to match what is displayed on the IR gun. I am going to take a longer drive tonight after meeting a friend.

Ayles · 07-23-2018, 09:00 PM

Same result on longer 20+ mile drive. Temp got to the first white tic mark and engine seems to be not getting hotter than the upper 190s per the IR gun. I am going to track it for a while longer, but starting to feel like this problem is solved.

SCadaddle · 09:32 PM

That's good news. Thanks Ayles. I'm more than certain the sender in my 82SC with the stock non-numeric gauge is the brass one, and I am not the original owner of the car. I've cleaned the flanges of the sender with a toothbrush about the best I can, but unfortunately the only data I can see on the one flange is "6-24V". Short of possibly using a flashlight and a dental mirror to find the data on the other flanges, it looks like a 19mm offset box end wrench would be the ticket to removal and replacement.

That would be a hell of a note to spend a chunk of money on an update to the trombone cooler to see no resolve and find out the problem was the incorrect temperature sender at a cost of $45.

I do plan on setting up the "boiling pot of water rig" with this new chrome 200C sender hooked to the wiring of the car and find out where my non numeric gauge reads at 100C/212F before making the swap out. And then while the rig is set up I'll test the old one as well.

Thanks again Ayles!

Ayles · 05:58 AM

I had to pull my sender and then clean with a wire brush before I could read all of the info off of it. Maybe you can order up some new crush rings or get them locally so you can remove the sender to see what you have.

7783911 · 7783911's Garage

well, i ve removed the entire external cooling system and found a crushed return line and on top of that the external thermostat failed the boiling water test..the pin moved about 1 mm after 2 minutes in boiling water...hope new one arrives this week as I intend to repair the crushed line Friday using the compressed air/heat methods. But since everything was out..all cleaned and new paint on rear lines and fonts and trombone were left as brass, even redid the T Stat WIWIT and new internals and end caps (with hex nuts!) are to be installed....Should be a fun few days off next week.