Re: {Chrysler 300} 1962 Oil & Temp Gauge Abnormalities

[John Grady <jkg@xxxxxxxxxxxxxxxxx>]

I believe nothing is wrong with gauges or senders , both sets would not go wrong in same way same time .

The gauge voltage regulator has probable failed or the ground that is needed on the metal that holds the gauges is not there or failed . It is a little jumper under the screws . Sort of poor design , as screws only go into plastic . You try a jumper from the metal frame that holds gauges to car body or tighten screws . If out of car ( a lot of work ) I solder a wire to that metal then to solid ground .

If gauge regulator has failed ( rare really) some are in the oil gauge , some are a little metal box , latter easy to change . If in oil gauge you either need a new oil gauge or slight Re wire for solid state one or retrofit one in the box  . 

JC may have that and instructions 

You can tell if regulator is working by putting a volt meter from temp sender to ground , some few volts should be there , but it should pulse on and off about every half second . If it does it works . If steady volts it is not working . Volt magnitude does not matter . 

Hope this helps . 

Car will run fine with no gauges but I doubt that is issue . Both would not fail at once . 

John 

Sent from my iPhone

On Jul 1, 2022, at 6:11 AM, 'Val Jeffers' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx> wrote:



Sports had a 150 mph speedometer ? Am I wrong ? Just wondering.

                                                                Thanks,

                                                                 Val J

On Friday, July 1, 2022 at 12:55:27 AM EDT, 'Matt Allyn' via Chrysler 300 Club International <chrysler-300-club-international@xxxxxxxxxxxxxxxx> wrote:

Attached are a pair of pictures from today when driving our ’62 300 Sport.

Here’s some history….

- Wife bought the car back in 1987

- We had JC Auto restore the Astrodome back in the 90’s

- I cracked the 413 block back in the early 2000’s (sitting in LA traffic, of course)

- We then let the car sit for 8 or so years

- Now its on the road & everything under the hood is new; but as a 383 versus a 413

- The Oil & Temp gauges are running on their HIGH side since we brought the car back to life

- I have new sending units feeding both gauges (yes they are new & aftermarket, but both cannot be sending high signals; right?)

I suspect the issue is the gauges themselves.

Maybe I pull them & send them to JC Auto.

Can the car still be used if I pull those two out?

When the temp is as pegged as it is…..

My laser temp sensor pointed at the radiator, its hoses, etc. reads between 180 & 190 degrees.

Any thoughts?

Thanks!

Matt Allyn

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