How to replace a thermostat on 1990 Mazda MX-6?

Disconnect the negative battery, remove distributor, and drain the coolant below thermostat. Remove upper radiator hose, unplug thermo switch, remove housing, replace and seal thermostat, reinstall outlet and hose, reconnect switch and distributor, refill coolant, start and run until hose is hot, top off and cap.

Genuine 1990 Mazda MX-6 Thermostat

Engine Coolant Thermostat

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1990 Mazda MX-6 Thermostat Part Number: 8AK1-15-171-9U
$22.70 MSRP: $30.27
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Product Specifications
- Other Name: THERMOSTAT (W/O GASKET)
- Item Weight: 0.70 Pounds
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 8AK1-15-171-9U
- Warranty: This genuine part is guaranteed by Mazda's factory warranty.
Fits the following 1990 Mazda MX-6 Submodels:
- DX, GT, GT 4WS, LE, LX | 4 Cyl 2.2 L GAS

1990 Mazda MX-6 Thermostat Parts and Q&A

Q: How to replace a thermostat on 1990 Mazda MX-6?
A: Disconnect the negative battery, remove distributor, and drain the coolant below thermostat. Remove upper radiator hose, unplug thermo switch, remove housing, replace and seal thermostat, reinstall outlet and hose, reconnect switch and distributor, refill coolant, start and run until hose is hot, top off and cap.