Service Manual 40-65 HP E-TEC Cooling System [Pressure Relief Valve Servicing]

The pressure relief valve assembly should be ser viced at the same time as the thermostat.

Remove screws and cover from pressure valve assembly.

Remove the pressure relief valve assembly.

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

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.

1. Plunger seal
2. 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).