Service Manual 40-90 HP.E-TEC Cooling System [Pressure Relief Valve Servicing]
HEAD” facing thermostat. Refer to Cylinder Head Installation on p. 245.
- Cylinder head seal
Inspection
Inspect all parts for cracks, heat damage, or signs of corrosion. Replace damaged parts. Clean debris from housing and parts.
Assembly
Assembly is the reverse of disassembly. Pay close attention when performing the following additional tasks.
Coat threads of thermostat cover with Gasket Sealing Compound and install new O-ring. Install and tighten cover to a torque of 120 to 144 in. lbs. (13.5 to 16 N·m).
PRESSURE RELIEF
PRESSURE RELIEF VALVE SERVICING
The pressure relief valve assembly should be serviced at the same time as the thermostat.
Disassembly
Remove screws and cover from pressure valve assembly.
Remove the pressure relief valve assembly.
Inspection
Inspect all parts for cracks, heat damage, or signs of corrosion. Replace damaged parts. Clean debris from housing and parts.
Pressure Relief Valve Assembly Components 002442
Assembly
Assembly is the reverse of disassembly. Pay close attention when performing the following additional tasks.
Install a new plunger seal squarely over ridge in housing.
Apply a light coat of Triple-Guard grease to a new cover o-ring and place in groove in housing.
- Plunger seal
- Cover o-ring
Install valve assembly into housing.
Tighten cover screws to a torque of 60 to 84 in. lbs. (7 to 9.5 N·m).
