4 cylinders + 6 cylinders 4 cylinders + 6 cylinders - Steyr Motors

ToC SERVICE MANUAL MARINE ENGINES
05 COOLING SYSTEM
05.01.04 Exchange heat exchanger element
7
9
8
6
5
4
01.04 ill.1
3
2
1
Dismantle heat exchanger element:
1 Drain closed coolant circuit, refer to 05.00.07
2 Drain raw water circuit, refer to 05.00.07 (item 1 remove drain plug).
3 Loosen 3 screws (ill.1/pos.1) of heat exchanger cover in front (ill.1/pos.2) and 3 screws (ill.1/pos.8)
of heat exchanger cover at the back (ill.1/pos.7). Remove heat exchanger cover in front and at the back.
Loosen the element by slightly knocking with a plastic hammer on the rear end of the element, and
remove it. Dispose O-ring and rear cover of heat exchanger element as well as seal of heat exchanger
cover.
4 Clean all sealing surfaces.
Assembly:
5 Grease O-Ring (ill.1/pos.5) with Molykote BR 2 PLUS and push it onto flange of heat exchanger
element (ill.1/pos.4). Then insert heat exchanger element from front into exhaust manifold.
Grease O-ring (ill.1/pos.6) with Molykote BR 2 PLUS and push it onto exposed rear end of heat
exchanger element.
6 Grease seal (ill.1/pos.9) with Molykote BR 2 PLUS and insert it into heat exchanger cover at the back
(ill.1/pos.7). Fix cover on exhaust manifold and loosely mount it with 3 screws (ill 1/pos.8) on exhaust
manifold.
7 Fix seal (ill.1/pos.3) together with heat exchanger cover in front on exhaust manifold and loosely mount
it with 3 screws (ill.1/pos.1).
8 First tighten 3 screws (ill.1/pos.1) of heat exchanger cover in front, with a torque of 23 Nm +/-2, then
3 screws (ill.1/pos.8) of heat exchanger cover at the back, with a torque of 23 Nm +/-2.
9 Remaining assembly is done in reverse order.
Z001019/0_6_July 2008 Page COOLING SYSTEM - 23