Peugeot 405 Manual

Oil cooler - removal and refitting
XU petrol engine in-car repair procedures / Oil cooler - removal and refitting


Note: The oil cooler is not fitted to all models.

Removal
1 Firmly apply the handbrake, then jack up the front of the vehicle and support it on axle stands (see Jacking and Vehicle Support).

2 Drain the cooling system as described in Chapter 1. Alternatively, clamp the oil cooler coolant hoses directly above the cooler, and be prepared for some coolant loss as the hoses are disconnected.

3 Position a suitable container beneath the oil filter. Unscrew the filter using an oil filter removal tool if necessary, and drain the oil into the container. If the oil filter is damaged or distorted during removal, it must be renewed.

Given the low cost of a new oil filter relative to the cost of repairing the damage which could result if a re-used filter springs a leak, it is probably a good idea to renew the filter in any case.

4 Release the hose clips, and disconnect the coolant hoses from the oil cooler.

5 Unscrew the oil cooler/oil filter mounting bolt from the cylinder block, and withdraw the cooler. Note the locating notch in the cooler flange, which fits over the lug on the cylinder block (see illustration).

15.5 Oil cooler/oil filter mounting bolt (A) and locating notch (B)
15.5 Oil cooler/oil filter mounting bolt (A) and locating notch (B)

Discard the oil cooler sealing ring; a new one must be used on refitting.

Refitting
6 Fit a new sealing ring to the recess in the rear of the cooler, then offer the cooler to the cylinder block.

7 Ensure that the locating notch in the cooler flange is correctly engaged with the lug on the cylinder block, then refit the mounting bolt and tighten it securely.

8 Fit the oil filter, then lower the vehicle to the ground. Top-up the engine oil (refer to Weekly Checks).

9 Refill or top-up the cooling system (as applicable) -see Chapter 1. Start the engine, and check the oil cooler for signs of leakage.


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