Removing oil-water heat exchanger

NOTE:

The illustrations apply to the Cayenne Turbo (M48/50).
If a fault in the oil-water heat exchanger has caused oil and coolant to mix, the oil circuit should be checked to see if there is coolant in the engine or, if necessary, be cleaned.
If oil has entered the coolant circuit, this is to be cleaned after repair . Refer to 19 01 29 Cooling system cleaned (after oil/coolant mixing) - as of MY 2003 (All Models) .

Fig 1: Sprind-band clamps for coolant lines

Courtesy of PORSCHE OF NORTH AMERICA, INC.

1. Release coolant hoses from oil/water heat exchanger. To do this, release the two spring-band clamps and pull the lines upwards.

2. Release the 4 fastening screws on the heat exchanger and pull the heat exchanger down and off. During this process, both engine oil and coolant will leak out. Collect leaking liquids and dispose of in accordance with legal requirements.