Temp gauge

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Mar 18, 2010 | 09:52 PM

michael m baily

Thread Starter

Racer

Joined: Jan 2007

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Temp gauge

Like I said on another post, I drove the 63 for the first itme the other day, today, I started it up and the temp gauge which was working great yesterday started acting up, the needle went past 240 to what would be about 280 and stayed there, I drove about 30 total miles, when I got home and cooled the car down the needle returned to O, I checked and the motor and radiator were cool, no evidence of over heating....what gives?

Mar 18, 2010 | 09:58 PM

Bill Irwin

Drifting

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From: DeBary Fl. Amateur Radio Operator K3CQR

Mike, start simple. Lightly wire brush the connector at the sending unit & make the sender brass nice and shiny. See what happens. Bill

Mar 18, 2010 | 09:59 PM

5thvet

Le Mans Master

Joined: Apr 2006

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From: San Clemente CA

Probably the temp sending unit. Did you check the actual temp with an IR gun at the thermostat housing?

Mar 18, 2010 | 10:00 PM

Bluestripe67

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From: Close to DC

C2 of the Year Finalist - Modified 2020

You might have a ground problem with the gauge cluster. Before redoing my cluster, my temp gauge would act up. My ground wire was not connected, but now, it's fine.

Dennis

Mar 18, 2010 | 10:50 PM

silver67

Pro

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From: ny

Quote:

Originally Posted by Bluestripe67

You might have a ground problem with the gauge cluster. Before redoing my cluster, my temp gauge would act up. My ground wire was not connected, but now, it's fine.

Dennis

I agree probably bad ground my gauge was loose in the cluster on my 63. Had to pull the cluster to tighten but that's all it was. I have a spare 63 gauge now................

Mar 19, 2010 | 03:17 PM

JohnZ

Team Owner

Joined: Oct 2000

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From: Washington Michigan

Quote:

Originally Posted by michael m baily

the needle went past 240 to what would be about 280 and stayed there, I drove about 30 total miles, when I got home and cooled the car down the needle returned to O, I checked and the motor and radiator were cool, no evidence of over heating....what gives?

1. Sending unit has gone south.

-or-

2. The wire from the sending unit to the gauge has grounded.

Turn the key on and remove the connector from the sending unit - the gauge should peg to Cold; then ground the connector terminal to the engine and the gauge should peg to Hot. If that happens, the gauge and wiring is fine and it's the sending unit.

Mar 19, 2010 | 03:54 PM

67*427

Burning Brakes

Joined: Mar 2008

Posts: 859

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From: Magnolia Texas

John,

How do you know it went south? Depending on where he is, might it not have gone north... or maybe even east. Not west for sure.

... sorry, couldn't resist...

Steve