How To Replace Coolant Overflow Tank 03-12 Volvo XC90
Difficulty: Beginner · About 25 min · Volvo Xc90
Replace the coolant expansion tank on a 2003–2012 Volvo XC90 by moving the power-steering reservoir aside, transferring the hose and sensor plug, and checking for leaks.
Tools you will need
- Flat Blade Screwdriver
- Drain Pan
Parts and supplies
- Coolant expansion tank
- Coolant
Steps
Allow the engine to cool
Park on level ground and let the engine cool completely before opening the cooling system. Place a drain pan beneath the tank area, then move the power-steering reservoir up and out of the way without disconnecting its hoses.
Disconnect and remove the old tank
Loosen the coolant-hose clamp and pull the hose from the expansion tank. Unplug the tank's electrical connector and lift the reservoir out of its locating points, catching any remaining coolant in the pan.
Install the replacement tank
Seat the replacement tank on its locating tabs. Reconnect the electrical harness and coolant hose, then tighten the hose clamp securely. Return the power-steering reservoir to its mounting position.
Refill and check for leaks
Top off the cooling system with the specified coolant using the vehicle's refill procedure. Start the engine only after the system is correctly filled and bled, then inspect the hose and tank connections for leaks and recheck the level after cooling.
Check your vehicle’s repair manual for exact specifications and fit.