The Stovebolt Site Forums The Shop Area Engine Shop Temperature gauge overrun

What would cause a temperature to go to 210 and then return to 180?
It will stay at 180 all day but it has to see 210 first. New thermostat checked and it opens slightly before 180.

It's the time/temp delta between when the unit begins to open (180) and where the sensor/water temp reaches before the water gets cooled and recirculated back to the sensor..

mechanical or electric gauge? [I'll bet mechanical] how long does it stay above 180? [I'll bet no more than momentarily]

what could cause it is the gauge being slightly sticky at the bottom of it's sweep

Bill

A small bleed hole in the thermostat will stop this in most cases.
This allows the stat to sense the temp quicker.

More data. This always occurred with original 55 2nd electrical gauge and sending unit. I thought I'd fix it by installing after market gauges and a new thermostat ( with bleed hole) Nothing changed.

Boy, you sure like to test us don't you.

55.2 would have had a mechanical gauge as 'original'

Bill

I never saw a mechanical water gauge, except for a mercury tube. I have a a one wire sending unit with a coil type meter.

until 56 all original temperature gauges were mechanical, which is what those that operate via a Bourdon [capillary] tube, filled with ether, are called, an electric gauge in a 55.2 would be a replacement, or possibly end of the year production, although the earliest 56's also had mechanical gauges

maybe your electric sender isn't sensing properly because it doesn't fit the location as the original mechanical bulb did, I believe the location and hole size for the sender changed for the electric gauge, you may have an adapter there affecting it - here's a mechanical gauge for sale

Bill

Bob,

check this site out. I had a problem with my sending unit on my '65 230 and the new sending unit did the trick.

http://www.lectriclimited.com/mainpage.htm

I was impressed!

Tom

Thanks Tom, I saved that website for the future. I'm sure on the temp because I measured it with a thermometer. Even though the radiator isn't that old and seems to flow well, I'm going to have it checked out at a radiator shop.
Bob

What should a 235 running temp be on a 80 degree day running down the highway starting with a 180 degree thermostat?

Ive driven my 235 in 100 Plus weather with a 180 stat

maintains 180

up hill gets up to 195

auto meter under dash electric gauge and sender.