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

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Old 12-15-06, 01:40 PM
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Engine Thermostat

Anybody know what temeprature the stock engine thermostat opens up at. Any suggestions on mazda oem or should i get a aftermarket one that opens up at about 160'C to lessen the chance of over heat.
Old 12-15-06, 01:47 PM
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Aftermarket I herd you get.

Something with the OEM one being bad or the otherway around. ...
Old 12-15-06, 01:52 PM
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Get the Mazda OEM one.
Old 12-15-06, 01:59 PM
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Thermostat opens at 80.5° - 83.5°C and is fully open at 95°C
-from FSM

Only use the Mazda OEM Thermostat
Old 12-15-06, 02:43 PM
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Everyone says use the OEM thermostat.
Old 12-15-06, 03:05 PM
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As stated, use an OEM thermostat.
Just an FYI-A lower thermostat will open sooner, but will not prevent the engine from overheating. Once the 'stat is opened and engine up to temp, it doesn't do any work unless in cold climates, then it will open and close to keep the engine within operating temperature.
Old 12-15-06, 03:39 PM
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Get an OEM one and use this part number #8AF6-15-171.

Make sure it has a jiggle pin. Dont use this part number 8AF6-15-171-9U as Mazda may say it works. Mazda gave me this part number with the -9U and it didnt work. It didnt have the jiggle pin. So make sure they give you the right one.
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