How to Replace a Volvo 850 Radiator

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    • 1). Remove the old radiator by first draining the cooling system. Detach the negative battery cable, set the parking brake, raise the front end of the car and block the rear tires. Remove the expansion tank filler cap. Turn your 850's heater control knob to the hot position. Place a drain pan under the radiator. Open the drain tap at the bottom left corner of the radiator to drain the coolant into the pan. Close the drain tap after the coolant is completely drained.

    • 2). Remove the radiator cooling fan and cooling fan shroud.

    • 3). Use a socket wrench to remove the mounting bolt from each side of the radiator. Release the front radiator clips and remove the splash guard located under the radiator.

    • 4). Disconnect the top and bottom radiator hoses.

    • 5). Remove the air conditioning condenser's two top mounting bolts with a socket wrench. Tie heavy string around the condenser and secure it to your Volvo's upper body panel. This allows the condenser to retain its position while you remove the two lower bolts.

    • 6). On automatic transmission models, disconnect the transmission fluid cooler lines from the left side tank of the radiator. Position an old towel under the fitting to catch the fluid. Plug up the lines to keep them clean.

    • 7). Remove the temperature sensor located on the top driver's side of the radiator, if necessary. On turbo models, disconnect the intercooler air ducts.

    • 8). Remove the radiator's bottom mounting bolts and brackets and then remove the radiator.


    • 1). Place the new radiator into the old radiator's location and secure the retaining bolts and clips. Reinstall the splash guard under the radiator. Reinstall the temperature sensor and intercooler air ducts, if necessary. Reconnect the fluid cooler lines if you own an 850 with an automatic transmission. Untie the string on the air conditioning condenser and secure it into place.

    • 2). Reinstall the cooling fan and cooling shroud. Reattach the top and bottom radiator hoses and then reconnect the expansion tank hose.

    • 3). Refill the cooling system with the appropriate coolant mixture. "Chilton's Coupes/Sedans/Wagons 1990-98 Repair Manual" recommends equal parts antifreeze and water. Slowly fill the cooling system through the expansion tank until the coolant reaches the maximum level line. Replace the expansion tank cap.

    • 4). Reconnect the negative battery cable. Run the engine at idle speed until it reaches normal operating temperature. Stop the engine and let it cool overnight. In the morning, remove the expansion tank cap and top up the tank with coolant. Tighten the filler cap.

    • 5). Check the fluid level on automatic transmission vehicles. If needed, top up the transmission fluid.

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