Yamaha XZ550RJ 1982 Service Manual page 148

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2. Filling with the coolant.
1) Check the drain bolt gaskets and 0-
ring in the thermostatic valve cover
for damage. If damaged, replace as
necessary.
1. O-ring
2) Install the drain bolts with the gakset
and torque the bolt to specification.
Tightening torque:
Drain bolt — cylinder:
7 Nm (0.7 m-kg, 5.1 ft-lb)
Drain bolt — Water pump cover:
10 Nm (1.0 m-kg, 7.2 ft-lb)
3) Lightly apply grease to the 0-ring,
and install the
thermostatic
valve
cover.
CAUTION:
Check the thermostatic valve and rubber gasket
position before installing the thermostatic valve
cover.
1. Thermostatic valve
2. Rubber gasket
3. Breather
4) Remove the sidecovers and fuel
tank.
5) Remove the air breather bolt from the
T-joint as shown.
1. T-joint
6) Pour the recommended coolant, and
soft water into the radiator until the
radiator is full.
Recommended coolant:
High-quality ethylene glycol anti-freeze
containing anti-corrosion inhibitors
for aluminum engines.
Coolant and soft water mix ratio:
50%/50%
Total amount:
2.3 L (2.0 Imp qt, 2.4 US qt)
Reservoir tank capacity:
0.35 L (0.3 Imp qt, 0.4 US qt)
From LOW to FULL level:
0.25 L (0.2 Imp qt, 0.3 US qt)
CAUTION:
Hard water or salt water is harmful to the engine
parts. You may use boiled water or distilled wa-
ter, if no soft water is available.
7) Reinstall the air breather bolt, radia-
tor cap, sidecovers, and fuel tank.
8) Run the engine several minutes to
recheck the coolant level in the radia-
tor. If it is low, add more coolant until
it reaches the top of the radiator.
9) Fill the reservoir tank with coolant up
to the "FULL" level.
Page 148

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