Removal & Installation: Thermostat: Removal

WARNING: This page is about a different variant/trim than selected.

CAUTION: Do not pry on water thermostat (8575) to remove.

Drain the cooling system so that the coolant level is below the water thermostat as described in COOLING SYSTEM BLEEDING .
Disconnect the heater return hose at thermostat housing located on the left front lower side of the engine (6007) (2.3L only). Disconnect engine coolant temperature sensor (ECT sensor) (12A648) connector (2.3L only).
Remove upper radiator hose (8260).
Remove the coolant outlet housing retaining bolts. Pull the elbow away from the cylinder head (6049) or manifold sufficiently to provide access to the water thermostat. Remove the water thermostat and gasket.

Fig 1: Removing/Installing Thermostat 4.0L Engine

Courtesy of FORD MOTOR CO.

THERMOSTAT PARTS 4.0L ENGINE

Item	Part Number	Description
1	10884	Water Temperature Sender
2	12A648	Engine Coolant Temperature Sensor
3	8592	Water Outlet Connection
4	-	Air Release Valve (Part of 8575)
5	E800156	Bolt
6	E854214	Sealing Ring (See B)
7	E854214	Water Thermostat
A	-	Tighten to 9-12 N-m (77-110 Lb-In)
B	-	Sealing Ring Must Be Preassembled onto Thermostat Prior to Thermostat Installation. Air Release Valve Must Be Positioned Once Thermostat Is Installed.