How to service and repair a thermostat on 2001 Toyota 4Runner?

In order to fix the thermostat, de-exhaust the radiator and remove the lower radiator hose. Take out the thermostat and check in hot water, it should open at 80-84°C and rise 8.5 mm at 95°C. Replace if necessary. Install a new gasket, fix, refill the coolant, and leak check.

OEM 2001 Toyota 4Runner Thermostat

Engine Coolant Thermostat

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2001 Toyota 4Runner Thermostat
Part Number: 90916-03075
$27.59 MSRP: $38.41
You Save: $10.82 (29%)
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Product Specifications
- Other Name: Engine Coolant Thermostat; Thermostat, Coolant
- Manufacturer Note: *WAX 82-95
- Part Name Code: 16331A
- Item Weight: 0.80 Pounds
- Item Dimensions: 2.3 x 1.1 x 1.9 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 90916-03075
- Warranty: This genuine part is guaranteed by Toyota's factory warranty.
More Info
Fits the following 2001 Toyota 4Runner Submodels:
- Base, Limited, SR5 | 6 Cyl 3.4 L GAS

2001 Toyota 4Runner Thermostat

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2001 Toyota 4Runner Thermostat Parts Q&A

Q: How to service and repair a thermostat on 2001 Toyota 4Runner?
A: In order to fix the thermostat, de-exhaust the radiator and remove the lower radiator hose. Take out the thermostat and check in hot water, it should open at 80-84°C and rise 8.5 mm at 95°C. Replace if necessary. Install a new gasket, fix, refill the coolant, and leak check.

Related 2001 Toyota 4Runner Parts

Alternate Year Models

2000 Toyota 4Runner Thermostat 2002 Toyota 4Runner Thermostat