Replacement of O-rings, heat exchanger
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Replacement of O-rings, heat exchanger
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1.
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Remove the expansion tank filler cap to release the pressure.
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2.
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Clamp the heat exchanger's inlet and outlet hoses using two pairs of pinch-off pliers 30 07 739.
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3.
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Remove the cover, lower dashboard section, and detach the side trim. remove the insulation under the heat exchanger.
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4.
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Remove the screws securing the heat exchanger, the two lower screws together with the plastic cover.
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5.
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Withdraw the heat exchanger slightly and remove the PAD connection. Detach the pipes from the heat exchanger and remove the O-rings.
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Use O-rings having part No. 50 45 885.
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1.
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Lubricate the O-rings with synthetic vaseline. Fit the O-rings on the pipes.
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2.
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Connect the pipes to the heat exchanger and slide the heat exchanger into the heating and ventilation unit.
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3.
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Fit the PAD connection.
Tightening torque: 3-4 Nm (2.2-3.0 lbf ft)
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4.
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Screw the heat exchanger into place.
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5.
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Remove the pinch-off pliers.
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6.
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Pressurize the cooling system and check for leaks from the pipe connections.
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7.
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Fit the insulation, side trim, lower section of dashboard and cover.
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8.
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Check the coolant level and top up as necessary.
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