Whay turbocharged engines have oil coolers?

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-Brazi

I know nothing of these engines.
Is it possible that the turbocharger is cooled by oil and that's what makes
the oil cooler necessary?
Is there, or could there be, provision for a zinc anode in the heat
exchanger? If so, corrosion would not be a problem.

Pascal Goncalves wrote:

Whay turbocharged engines have oil coolers?

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-Brazi

I'm also no expert ... but here's my thinking. Auto engines have an oil pan
located below the block where the engine oil is cooled to some extent
because it's exposed to the air (heat transfer to the air through the pan
that is). Boat engines don't have that luxury, the easiest solution for a
marine engine being to use a water cooled oil cooler ... my I/O for example
has an oil cooler ... I'm guessing most marine engines turbo or not have a
cooler. So I'm saying the cooler is not used so much to accomodate the
turbo.But ... I'm thinking the turbocharger will add further heat to the oil
.... yes ... as far as I know, engine oild is used to lubricate the turbo ...
just ask anyone who's lost a turbo seal to suddenly have all the engine oil
pumped outta the system. If it was me, and I wanted to lose the cooler, I'd
look into say a quality synthetic agreeable with your engine/turbo ... after
all, the purpose is lubrication (but high temperature is not good for that
standard oil).


Pascal Goncalves wrote in message
om...
Whay turbocharged engines have oil coolers?

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-Brazi

Jim Conlin wrote in message ...
I know nothing of these engines.
Is it possible that the turbocharger is cooled by oil and that's what makes
the oil cooler necessary?
Is there, or could there be, provision for a zinc anode in the heat
exchanger? If so, corrosion would not be a problem.


Thank You,I think you are correct, i cannot eliminate the oil
cooler,since the turbine uses the oil as a cooling fluid besides as a
lub, and a high temperature in the oil, could damage the turbine. My
oil cooler and the water cooler does not uses any anodes,as the motor
as well.

Regards

"Pascal Goncalves" wrote in message
om...
Whay turbocharged engines have oil coolers?

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.

Why do you need to use a Volvo oil cooler? Perhaps you could talk to
somebody locally that makes heat exchangers to make or sell you one for a
lot less. Look up "Heat Exchanger" in your telephone book. If not that,
talk to shops that repair radiators to find you a heat exchanger.


--
Evan Gatehouse

you'll have to rewrite my email address to get to me
ceilydh AT 3web dot net
(fools the spammers)

Pascal,
Oil coolers are normally installed on all industrial engines. Do not confuse
water temperature with oil temperature. Petroleum oil rapidly loses its
ability to lubricate when the oil temperature is above 100C. Turbochargers
are lubricated by engine oil and by doing so, absorb a lot of exhaust gas
heat as the exhaust side of the turbo will run at a temperature somewhere
between 600 and 800C. Oil coolers must be installed with a thermostat, just
like your cooling water system, because the oil temperature must also exceed
90C. If the oil does not get that hot, water will build up in the oil and
create sludge. So ,to answer your question, you must connect a temperature
gauge to your oil pan and watch the temperature. It is quite possible that
your usage will not overheat the oil. Bypass the cooler and watch. If your
oil gets too hot, reinstall a new cooler. Oil cooler corrosion is a sign
that you are suffering electrolytic corrosion. Make certain that all
dissimilar metals in the salt water circuit are not electrically grounded,
if that is not possible, use a zinc sacrificial anode and change annually.
Steve
"Pascal Goncalves" wrote in message
om...
Whay turbocharged engines have oil coolers?

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-Brazi

Pascal,
The oil cooler is important on that engine. It is nothing special.
There is a lot of very nice metal work done in Brazil, you could get one
made or find something that is close and get it fit to the engine.
Matt Colie

Pascal Goncalves wrote:
Jim Conlin wrote in message ...

I know nothing of these engines.
Is it possible that the turbocharger is cooled by oil and that's what makes
the oil cooler necessary?
Is there, or could there be, provision for a zinc anode in the heat
exchanger? If so, corrosion would not be a problem.



Thank You,I think you are correct, i cannot eliminate the oil
cooler,since the turbine uses the oil as a cooling fluid besides as a
lub, and a high temperature in the oil, could damage the turbine. My
oil cooler and the water cooler does not uses any anodes,as the motor
as well.

Regards

"Steve Lusardi" wrote in message ...
Pascal,
Oil coolers are normally installed on all industrial engines. Do not confuse
water temperature with oil temperature. Petroleum oil rapidly loses its
ability to lubricate when the oil temperature is above 100C. Turbochargers
are lubricated by engine oil and by doing so, absorb a lot of exhaust gas
heat as the exhaust side of the turbo will run at a temperature somewhere
between 600 and 800C. Oil coolers must be installed with a thermostat, just
like your cooling water system, because the oil temperature must also exceed
90C. If the oil does not get that hot, water will build up in the oil and
create sludge. So ,to answer your question, you must connect a temperature
gauge to your oil pan and watch the temperature. It is quite possible that
your usage will not overheat the oil. Bypass the cooler and watch. If your
oil gets too hot, reinstall a new cooler. Oil cooler corrosion is a sign
that you are suffering electrolytic corrosion. Make certain that all
dissimilar metals in the salt water circuit are not electrically grounded,
if that is not possible, use a zinc sacrificial anode and change annually.
Steve
"Pascal Goncalves" wrote in message
om...
Whay turbocharged engines have oil coolers?

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-Brazi


I wish to tank you all, for the good advises; In summary, I agree
that:

1) The elimination of the oil cooler is not a good idea
2) The more frequent change in oil lub would benefit the turbine
anyway
3) The best solution is to procure someone wich can make a similar
oil cooler but at amore razonable cost, say about US200.00
4) This new custom made oil cooler should have best materials and/or
sacrificial zinc anodes
5) If possible,the new assemble should have an option, so that the oil
cooler could be bypassed in an emergency situation.
6) The idea of using fresh water instead raw water in the oil cooler
could be anayzed as well

Best regards

Pascal Goncalves
s/v Navstar
Salvador-Bahia-Brazil

Most marine heat exchangers are made by Senco. Look them up in a search and
you'll probably find an exact OEM replacement.

--


Keith
__
I! Finally! Figured! Out! How! To! Punctuate! Kirk's! Sentences!
"Evan Gatehouse" wrote in message
...

"Pascal Goncalves" wrote in message
om...
Whay turbocharged engines have oil coolers?

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.

Why do you need to use a Volvo oil cooler? Perhaps you could talk to
somebody locally that makes heat exchangers to make or sell you one for a
lot less. Look up "Heat Exchanger" in your telephone book. If not that,
talk to shops that repair radiators to find you a heat exchanger.


--
Evan Gatehouse

you'll have to rewrite my email address to get to me
ceilydh AT 3web dot net
(fools the spammers)