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post #1 of (permalink) Old 12-17-2000, 01:25 AM
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Another autometer mechanical water gauge question

I did a search on this and no one seemed to answer it. I have an autometer mechanical water temp guage with a 1/2" NPT fitting. I Have it installed on my 401's elderbrock performer intake. I had to use a brass fitting from Napa to make it fit but now it's not reading right. I think the fitting is keeping the sender from submerging in the coolant, and giving a false reading. I've seen other posts with this problem and was wondering what they did. The electic sender location is only 1/4" . Is there a 1/2" fitting somewhere I'm missing.

78 CJ-7/401/TH400/Quadratrac/35" BFG AT'S
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post #2 of (permalink) Old 12-17-2000, 02:12 AM
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Re: Another autometer mechanical water gauge question

The only way to test a mechanical temp guage is to stick the bulb in boiling water for a few minutes. It should read somewhere in the neighborhood of 210F - say 200 to 220

Mechanical automotive temp guages are notoriously inaccurate and that accuracy is usually rated as a percentage of full scale. In most cases that number is 5.0%. So, if your gauge reads 280 full scale, the tolerance will be the reading 14

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