- With the engine cold, undo the coolant reservoir cap and remove it.

1. Fit the engine cooling system leakage test equipment on the reservoir filler.

2. Manually pressurize the circuit and check that the reading on the pressure gauge remains constant.

- Remove the tool from the engine coolant supply reservoir.

1. Tighten the engine coolant reservoir cap on the fitting.

2. Connect the fitting to the hand pump, submerge the engine coolant reservoir cap in water in a suitable container.

- Pressurize the cap by hand and check for leaks and that the the vent valve in the cap opens at the specified pressure.