Motometer reading How do you read/interpret a Motometer? I see the "mercury" move up and down based upon temperature:, but there is no calibration to relate it to. Thanks!
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Re: Motometer reading There is a simple way to guesstimate the temperature by looking at the mercury rising in the car. Get a near thermometer, or some other cheap thermometer with the range of 0-4-- degrees and pull over while driving normally and measure the temperature of the radiator water. Note where the mercury is. Then do it when it is a hot day and the mercury is quite a bit higher. You will have some base points. Use caution and a rag, don't get scalded. If the car is steaming, wait a spell. Most motometers have some type of scale on one face, turn that one to be visible from the drivers seat.
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Re: Motometer reading When my As are in motion and air is being drawn through by the fan and the motion of the car, I rarely ever see any mercury on the motometer- maybe 1/8 inch on really hot days. When idling, it might go up 1/2" or so.
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Re: Motometer reading If I remember correctly, I thought the motometer, at least mine does, noted what was going on as far as the temp of the car. The mercury would go up and as it goes up I thought you could read what was happening with the motor-like run temp, boil temp, etc..
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Re: Motometer reading You're right Fred, Also in the little circle hole near the top, it would read "summer average".
Ten1is; do you have the inner plate that's supposed to face the driver in behind the thermometer glass? This is where your info is printed in the Motometer. |
Re: Motometer reading Don't fret too much on reading a new motometer.
When new, they hardly ever read, except when near boiling . After a few months, you will get the inevitable gaps of air in the red fluid. This has worked great for me. Both of my motometers now work in a visible area of sight. The air seems to have settled down the bottom out of sight and just pushes the red up higher . No, I am not going to freeze them or swing them around my head to get the red back down . |
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Re: Motometer reading I have both old original, 60s repro and old "aftermarket'---i think messco or something like that ---they all read accuratly, and only will get the "air bubbles" if laid on the side with the top lower than the bottom, i have compared top tank temps to the reading and they are close even with the coolant level at the bottom of the baffle, there is a line just below the opening --cold motor, use radiator cover ---this is 140-150,just above the top of the open circle is boiling---that is when I get steam out the overflow
years ago my father bought and sold many motormeters, unless the glass tube was broken they worked, and were accurate |
Re: Motometer reading What exactly is the red fluid? I can't see it being Mercury since that is silver metal and I don't think one can dye it red. I've had old Motometers that seem pretty accurate but I got a new one for the A, and doesn't work very well. I went back to just the plain cap. Maybe the old type fluid had something to do with the accuracy back in the day.
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Re: Motometer reading 100 % method to not have any air gaps in your motometer......
http://i86.photobucket.com/albums/k1...ps3a1cc9cf.jpg |
Re: Motometer reading If you have gaps in the RED CRAP, let it idle, with the radiator mostly covered with cardboard, until the lower red goes up & touches the "other" reds & remove said cardboard, & all the red will come down together! COMPRENDE' ?
And DON'T swing thet thing around on a rope, might break yo' head ur yo' windshield!!:eek::eek: ur hit yo' po' Dog:cool::eek::eek: ur yo' Mother-in-Law:mad: ---Your wife is smart enuff to stay in the HOUSE, while she calls the "FUNNY-FARM":D Bill W. (OH! and while cruising along with a Moto-Meter, if the temp goes UP & Down in regular 2 to 3 minute intervals, YOU ARE LOW ON WATER!! And don't forget the roofing nail trick, like, jist drop it in the top of the overflow tube & give sum nails to your friends!) |
Re: Motometer reading With a good balanced cooling system the motometer is great.
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Re: Motometer reading you can also tap the air pockets out of the motometer by firmly banging the lower end on a tire or a soft piece of wood, kind of the way you shake down a thermometer .
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Re: Motometer reading 1 Attachment(s)
My motometer seems to have TWO different liquids. A clear/silver liquid column is visible most times (which I thought might have been mercury?). When the car reaches operating temperature, a red column just starts to poke up into the visible zone. I'm confused because the clear/silver liquid appears to have breaks in the column. You can see this in the photo, taken after a 20 min run in the car. The red is just visible at the bottom, but there is a definite second column with what appears to be two air bubbles in it, one large and one small.
What's going on here? I confess to laying the motometer sideways while topping up the radiator before I knew better. :( |
Re: Motometer reading I open the cap and heat the brass bulb on the bottom with a heat gun till the red reaches the top when it comes back down it is connected.
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Re: Motometer reading I had a small antique thermometer laying on the dash of my car. The interior of the car got so hot that the bulb was broken and the red alcohol spilled out.
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