d04093
page 9 - 3
Jan. 01/2007
Effectivity: 582 DCDI
OM Edition 1 / Rev. 0
BRP-Rotax
09178
9.1.3) Cooling system of the ROTAX 582 UL DCDI mod. 99
Engine cooling is performed by liquid cooled cylinder and cylinder
head.
The cooling system is in a two circuit arrangement.
The cooling liquid is supplied by a integrated pump in the engine
through the cylinders and the cylinder head to the radiator. The
cooling system has to be installed such that vapour coming from
the cylinders and the cylinder head can escape to top via a hose
either into the water tank of the radiator or to an expansion
chamber.
The expansion tank is closed by a pressure cap (with excess
pressure valve and return valve). At temperature rise of the coolant
the excess pressure valve opens and the coolant will flow via a
hose at atmospheric pressure to the transparent overflow bottle.
When cooling down, the coolant will be sucked back into the
cooling circuit.
1 crankcase
2 cylinder
3 cylinder head
4 water pump
5 radiator
6 hose from radiator to water pump
7 hose from cylinder head to radiator
8 radiator screw cap, with excess
pressure valve and return valve
9 temperature gauge for cooling water
10 overflow hose
11 overflow bottle
12 bottle venting
13 expansion tank
fig. 9
2
7
9
1
12
4
13
11
10
6
3
5
8
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