Bleeding the Heater Coolant System

WARNING: This page is about a different car, the 2002 Volvo C70, 2001 Volvo C70, 2000 Volvo C70, 1999 Volvo C70, and 1998 Volvo C70. However, it is still accessible from the selected car via links, so may be relevant.

The following are required for the work:

the hose clip
steel ball, P/N 400605-2.

Fig 1: Identifying Coolant In Coolant Reservoir

Courtesy of VOLVO CARS OF NORTH AMERICA.

Release any pressure in the system
Open the cap of the coolant reservoir carefully so that any pressure seeps out
Tighten the cap again.

Fig 2: Identifying Steel Ball

Courtesy of VOLVO CARS OF NORTH AMERICA.

Disconnect the hose from the engine at the steel pipe
Position the steel ball (P/N 400605-2) in the hose
Reinstall the hose on the steel pipe
Tighten the hose clamp.

Fig 3: Identifying Coolant In Coolant Reservoir

Courtesy of VOLVO CARS OF NORTH AMERICA.

Top up the cooling system with coolant
Reinstall the cap on the coolant reservoir. Tighten the cap.

Fig 4: Starting Engine

Courtesy of VOLVO CARS OF NORTH AMERICA.

Start the engine. Drive the car until operating temperature is reached. Allow the engine to rev to approximately 4000-5000 RPM.

Check that hot air comes out of the floor vent and defroster.

Stop the engine. Allow the engine to cool so that the heater hose with the steel ball can be handled
Start the parking heater.

Check that hot air comes out of the floor vent and defroster.

Fig 5: Identifying Steel Ball-Bearing In Hose

Courtesy of VOLVO CARS OF NORTH AMERICA.

Feel that the steel ball-bearing is in the hose. If it is not tap the steel pipe gently, so that the ball-bearing falls down into the hose.

Fig 6: Identifying Hose Clip Clamping Hose

Courtesy of VOLVO CARS OF NORTH AMERICA.

Clamp the hose using a hose clip so that the ball lies between the hose clip and the steel pipe, as close to the steel pipe as possible.

Fig 7: Identifying Ball Bearing, Hose Clamp And Hose Clip

Courtesy of VOLVO CARS OF NORTH AMERICA.

Disconnect the hose and remove the ball bearing
Reinstall the hose on the pipe. Tighten the hose clamp
Remove the hose clip.

Fig 8: Starting Engine

Courtesy of VOLVO CARS OF NORTH AMERICA.

Start the engine. Run the engine for approximately 10 seconds. Shut off the engine again
Start the parking heater. Check that warm air comes out of the floor vents and defroster.

Top up the coolant if necessary.