Thermostat Replacement
Shop Cost
~$300
DIY Parts
~$30
You Save
~$270
Tools needed (one-time, if you don't own them)~$95
Tools Required (4)
Socket set
Scraper/razor blade
Drain pan
Pliers
Parts & Consumables
ThermostatGasketCoolant
Pro Tip Spring side faces engine.
🚗 Vehicle-Specific Notes
Honda
Usually in lower radiator hose housing. 10mm bolts. Jiggle valve faces up.
Toyota
Bottom of engine, follow lower hose. 10mm bolts. 170-180F thermostat.
BMW
Electric thermostat on N52/N55. Map-controlled. Electrical connector.
Extra tools: BMW scan tool for bleed procedure
Subaru
Under intake on boxer. Accessible from top. Bleed air from heater hose.
Ford
Follow upper radiator hose to housing. 8mm bolts. Gasket or O-ring seal.
Chevrolet
Under throttle body on many. Follow upper hose. 13mm bolts.
❓ Common Questions
What tools do I need for a thermostat replacement?
You need 4 tools: Socket set, Scraper/razor blade, Drain pan, Pliers. Parts required: Thermostat, Gasket, Coolant.
How much does a thermostat replacement cost DIY vs shop?
A shop charges approximately $300. Doing it yourself costs about $30 in parts, saving you $270.
How hard is a thermostat replacement to do yourself?
Rated Moderate (3/5 difficulty). Typically takes 1-2 hrs. Spring side faces engine.
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