General View Of Engines - Volkswagen Marine SDI Series Operating Manual

OPERATION

General view of engines

Description of engines
SDI-40-4, SDI 50-4 and SDI-60-4
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Four-stroke diesel engine
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4-cylinder in-line
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1.9 litre displacement
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Crankshaft mounted on five bearings
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Valve control by toothed belt and over-
head cam
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Hydraulically adjusted bucket tappets
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Engine lubrication as pressure circulation
lubrication with geared oil pump and
replaceable oil filter in main flow
-
Dry air filter
4
4
The engine has two separate cooling
circuits.
1 - The open seawater circuit runs via the
gearbox radiator,
exchanger and the exhaust manifold.
2 - The coolant circuit runs as a closed
pressurised system through the engine
block, oil cooler, exhaust collector and,
after reaching the operating tempera-
ture, via the main heat exchanger.
Attention
Refer to the safety instructions
provided on Page 17 onwards
before carrying out any work on
the engine or in the engine
compartment.
BM4-001M
the main heat
OPERATION