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Old 06-01-2021, 03:19 PM   #1
hermitrob
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Default 1934 V8 temperature sensor

I would like to monitor the water temp in my '34 V8. I bought a gauge from Snyders that is for a Model A. I was hoping it would work as my water pumps are tapped for 1/2 NPT. Well the unit has a 1/2 fitting threaded into a 3/4 inch fitting. I thought I could take it apart and just thread the 1/2 inch part into my water pump. Nope. It leaks. What are folks using to get temperature reading on 1934 flathead V8's?
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Old 06-02-2021, 12:19 AM   #2
deuce lover
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Default Re: 1934 V8 temperature sensor

The port in those pumps - if they are the 35-36 left - are not NPT. There is a seat at the base of the treads in the pump for the temp bulb(if that's what you have). You will need an adapter. I got my adapter from John Wolf & Co in OH.
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Old 06-02-2021, 06:08 AM   #3
Terry,OH
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Default Re: 1934 V8 temperature sensor

34 water pumps do not have a threaded hole for a temperature sensor. 35 & 36 LH pumps Do have the temperature port which has a SPECIAL SEAT and the threads are 5/8-18 which is not an NPT thread.
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Old 06-02-2021, 07:09 AM   #4
hermitrob
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Default Re: 1934 V8 temperature sensor

previous owner must have changed water pumps. there is a plugged hole on the side of each water pump
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Old 06-02-2021, 07:44 AM   #5
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Default Re: 1934 V8 temperature sensor

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Most likely you have 35 or 36 LH pump mounted on the right and left. Stewart Warner temperature gauge with the bourdon tube style have the 5/8-18 nut and the sensor bulb has a flange to work on the 35-36 original style LH pump. Other temperature gauges may also.
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