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Eliminating the oil cooler on VP 2003T
In article ,
(Pascal Goncalves) wrote:
I have a Volvo Penta 2003T engine in my 1992's 36 ft sailboat; this a
turbocharged version of the 2003 and it have an Oil Cooler instaled
inline, before the fresh Water cooler. The oil cooler is made of
aluminium with the inner tubes of cooper, and because it uses raw
water, is prone to corrosion. A new one, woul cost to me, here in
Brazil, about US$ 1,200.00 wich I think is unaceptable.
This engine is 45 HP, and has a turbocharge (turbine) but the
operating temperature is not so high; the thermostat begins open at
74 °C and is fully open at 87 ºC; the new Volvo Penta 2040 wich is
not turbocharged and has 40 HP, operate at a higher temperature
(82-95°C) but does not have an oil cooler. Both engines uses the same
lub oil (15W40).
The oil cooler, is a very critical piece, since it can cause the
complete desctruction of the engine, in case of the raw water goes to
the engine lub oil. I am tempted to eliminate this oil cooler
bypassing it and not refrigerating the lub oil at all. What would be
the drawback? I use this motor very lightly, at 2,000 rpm, not at
the maximum 3,200 rpm.
Thanks for the help
Pascal Goncalves
Salvador-BA-Brazil
The drawback is, that the lube oil in a diesel is part of the cooling
system, and by not cooling it you are raising the temp that the engine
runs at, inside the engine where the heat is generated, by the froction
of the moving parts. By raising those temps you are adding stress, and
your oil will be breaking down faster, due to the extra heat. Bad for
the bearings and other lubed moving parts. If you choose to remove the
oil cooler then you must cut in half you lube oil change cycle, just to
keep the oil breakdown products to a reasonable level.
Much better to get a third party oil cooler to replace the one that
is causing the concern. These engines are Engineered to operate in
the designed way, and by changing the design, you take the risk of
lowering the MTBF (Mean Time Between Failure), and MTBR (Mean time
Between Rebuild), substantially for the engine.
Bruce in alaska
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