Draining and Filling Coolant

To drain the coolant, disconnect the coolant hoses indicated in Fig. 4-1. To refill the system, first reinstall the lower radiator hoses and their clamps. Then fill the system with the coolant and water mixture until the level reaches the Max mark on the coolant reservoir as shown in Fig. 4-2. Mixture proportions are given in Table b. Start the engine and let it idle, rechecking the coolant level after it has had a chance to circulate. After the engine has cooled, check the coolant level and add coolant as necessary.

Fig. 4-1.

Hoses (1) to be removed for draining coolant from coolant pump and thermostat housing (2).

Fig. 4-2.

Fill level marks on coolant expansion tank. Level should be between Max and Min marks (arrow) with engine cold.

Table b. Anti-Freeze-to-Water Proportions

To replace a hose:

1.	Drain the coolant as described above.

2.	Remove the hose. Using a screwdriver, or pliers in the case of spring clamps, loosen each hose clamp and slide the clamps away from the hose ends.

Fig. 4-3.

Stuck hose being removed by cutting.

3.	Clean the hose connections. Make sure any bits of old hose and sealer are removed. Clean them with a wire brush if necessary.

4.	Install the new hose. Lightly coat the connections with water-resistant sealer. Place the loose hose clamps onto the new hose before fitting the hose ends to the connections.

Fig. 4-4.

Identification of hose and connection suitable for use with spring clamp (A). Hose (B) bears spring clamp symbol and is smooth on inside (instead of corrugated). Connection (C) has larger bead and is about 5 mm (1/4 in.) longer.

5.	Position and tighten the clamps. Place the clamp as near the bead as possible and at least 4 mm (5/32 in.) from the hose end, as shown in Fig. 4-5. Tighten screw-type clamps enough to compress the hose firmly around the connections.

Fig. 4-5.

Hose clamp correctly installed on hose end.