2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Water thermo sensor

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Old Oct 1, 2013 | 04:32 PM
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iamsisyphus's Avatar
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From: Surry, NH
Water thermo sensor

Was jacking up the motor to change the mounts when these fell out. Later, I discovered the water thermo sensor is broken. The clip goes to something else, I think. I can't figure out how the rod fits in.
Attached Thumbnails Water thermo sensor-image-317811111.jpg   Water thermo sensor-image-3119114246.jpg  
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Old Oct 1, 2013 | 04:35 PM
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Completely disassembled.
Attached Thumbnails Water thermo sensor-image-2671362289.jpg  
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Old Oct 1, 2013 | 04:37 PM
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That's the Water Thermo Valve. W/o it you'll have vacuum leak.
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Old Oct 1, 2013 | 04:55 PM
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junk the thermovalve and find another one.

the clip is for the cruise control cable to keep it from walking around on its bracket.
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Old Oct 1, 2013 | 05:43 PM
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Do you know where I can get one of these? I checked Mazdatrix, but I couldn't find one. I'm hesitant to buy one from a part out. After disassembling my 25 year old valve, I don't think another 25 year old valve is a good idea.
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Old Oct 1, 2013 | 05:47 PM
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From: https://www2.mazda.com/en/100th/
the M/T one is N304-13-980A.
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Old Oct 1, 2013 | 06:18 PM
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From: tulsa,ok.
A used one will be cheap and at the same time they are easy to test as per the instructions in the FSM.

And you don't really need the valve as it only controls the double throttle diaphragm and it probably doesn't work. All you really need to do is cap the port on the manifold which runs to the valve and there goes the vacuum leak. The object of the valve is it allows vacuum coming from the manifold hose to be directed towards the valve hose which runs to the diaphragm.

Last edited by satch; Oct 1, 2013 at 06:29 PM.
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Old Oct 1, 2013 | 06:51 PM
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From: https://www2.mazda.com/en/100th/
Originally Posted by satch
A used one will be cheap and at the same time they are easy to test as per the instructions in the FSM.

And you don't really need the valve as it only controls the double throttle diaphragm and it probably doesn't work. All you really need to do is cap the port on the manifold which runs to the valve and there goes the vacuum leak. The object of the valve is it allows vacuum coming from the manifold hose to be directed towards the valve hose which runs to the diaphragm.
true. in the GSL-SE implementation the valve fails the double throttle stays closed, so i've replaced a bunch on those.

the FC has it the other way, so they can go bad and i'd never know, because the double throttle would be open
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Old Oct 2, 2013 | 11:25 AM
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From: Smiths Falls.(near Ottawa!.Mapquest IT!)
Crap!.
I had one of those and was gonna let you know,but the Top plastic cap is off it.(the cap under that clip in your pic).
I'll be going through the Shed either today or tomorrow,SO if you need one LMK and I can ship for the price of shipping.
Coffee donation would be a nice treat..lol..hint!.(not Starbucks!)
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Old Oct 2, 2013 | 02:07 PM
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From: Surry, NH
I'll take it if you got it. PM me for payment arrangements.

Thanks,

Doug
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Old Oct 2, 2013 | 10:38 PM
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From: Smiths Falls.(near Ottawa!.Mapquest IT!)
Shed is a freakin mess..!
I didn't categorize anything just dumped and stored stuff in plastic totes to keep the squirrels out,so it is a HUNT for Red October every time I look for stuff.
I know where the one is without the cap,but I just wanna see if I have a whole N/A TB with that part on there.IF I do have one,then I can send you a Good one.
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