Diesel engine operation

Posted by William A. Cormack (wacormack@…>)

In the last week or so someone stated that they were relying on their temperature gauge to indicate that their engine was operating efficiently and at high enough RPM to prevent undue wear.

From what I have been told this is not a good idea. As with your car’s engine, the thermostat restricts the flow of cooling water to bring coolant temperature up to normal as quickly as possible. This can happen even at idle RPMs However, the temperature of the engine’s many parts will still be below optimum temperature even when the temperature gauge says it is hot. This low temperature condition will continue until a substantial load is placed on the engine.

Moral of the story is DON’T RUN UNDER LIGHT LOAD VERY OFTEN OR FOR VERY LONG. A few minutes of idle is recommended on start up and before shut down.

If any of this is incorrect please let me know.

Bill
Sailing F-36 #46 (1986) Hard Earned out of New Bedford Yacht Club
Padanaram, MA

Posted by Michel Capel (mike_c_f35ck@…>)

Bill,
This is what they told me also about diesel engines.
Mike


— In freedomyachts2003@yahoogroups.com, “William A. Cormack”
<wacormack@w…> wrote:

In the last week or so someone stated that they were relying on
their temperature gauge to indicate that their engine was operating
efficiently and at high enough RPM to prevent undue wear.

From what I have been told this is not a good idea. As with your
car’s engine, the thermostat restricts the flow of cooling water to
bring coolant temperature up to normal as quickly as possible. This
can happen even at idle RPMs However, the temperature of the
engine’s many parts will still be below optimum temperature even when
the temperature gauge says it is hot. This low temperature condition
will continue until a substantial load is placed on the engine.

Moral of the story is DON’T RUN UNDER LIGHT LOAD VERY OFTEN OR FOR
VERY LONG. A few minutes of idle is recommended on start up and
before shut down.

If any of this is incorrect please let me know.

Bill
Sailing F-36 #46 (1986) Hard Earned out of New Bedford Yacht Club
Padanaram, MA

Posted by Don Young (donzenet@…>)

My understanding, as well. However, pulling into a “truck stop” fuel
station always reveals several big rig trucks doing just that - engine at
idle for hours at a time.

Don

-----Original Message-----
From: Michel Capel [mailto:mike_c_f35ck@…]
Sent: Friday, March 04, 2005 7:41 AM
To: freedomyachts2003@yahoogroups.com
Subject: [freedomyachts2003] Re: Diesel engine operation




Bill,
This is what they told me also about diesel engines.
Mike


— In freedomyachts2003@yahoogroups.com, “William A. Cormack”
<wacormack@w…> wrote:

In the last week or so someone stated that they were relying on
their temperature gauge to indicate that their engine was operating
efficiently and at high enough RPM to prevent undue wear.

From what I have been told this is not a good idea. As with your
car’s engine, the thermostat restricts the flow of cooling water to
bring coolant temperature up to normal as quickly as possible. This
can happen even at idle RPMs However, the temperature of the
engine’s many parts will still be below optimum temperature even when
the temperature gauge says it is hot. This low temperature condition
will continue until a substantial load is placed on the engine.

Moral of the story is DON’T RUN UNDER LIGHT LOAD VERY OFTEN OR FOR
VERY LONG. A few minutes of idle is recommended on start up and
before shut down.

If any of this is incorrect please let me know.

Bill
Sailing F-36 #46 (1986) Hard Earned out of New Bedford Yacht Club
Padanaram, MA







Yahoo! Groups Links

Posted by Brian Guptil (sailordude@…>)


Bill is
correct.
The truckers
that let there engines idle will pay the price of fuel dilution of the lube oil
and eventually polishing of the cylinders which leads to burning oil.
Most of them are doing that for heat in the sleeper. Some have APU’s to do that rather then to put ware and tare on the main
engine.

Engine warm up
is recommended but not necessarily to operating temp, get underway and keep the
load light till maybe 20 minutes out. Long periods of idle, like to
charge batteries of refrigeration is the worst thing you can do to a diesel.
Though you need not necessarily operate at 95% of rated continuous to keep the
engine loaded, running at 80% of max RPM is very reasonable.
It the engine is overheating or underheating, you have some troubleshooting and
work to do.

Brian
Guptil
sailordude@…

-----Original Message-----
From: Don Young
[mailto:donzenet@…]
Sent: Sunday, March 06, 2005 7:17 AM
To: freedomyachts2003@yahoogroups.com
Subject: RE: [freedomyachts2003]
Re: Diesel engine operation

My understanding, as well. However, pulling into
a “truck stop” fuel
station always reveals several big rig trucks
doing just that - engine at
idle for hours at a time.

Don

-----Original Message-----
From: Michel Capel [mailto:mike_c_f35ck@…]
Sent: Friday, March 04, 2005 7:41 AM
To: freedomyachts2003@yahoogroups.com
Subject: [freedomyachts2003] Re: Diesel engine
operation




Bill,
This is what they told me also about diesel
engines.
Mike


— In freedomyachts2003@yahoogroups.com,
“William A. Cormack”
<wacormack@w…> wrote:

In the last week or so someone stated that
they were relying on
their temperature gauge to indicate that their
engine was operating
efficiently and at high enough RPM to prevent
undue wear.

From what I have been told this is not a good
idea. As with your
car’s engine, the thermostat restricts the flow of
cooling water to
bring coolant temperature up to normal as quickly
as possible. This
can happen even at idle RPMs However, the
temperature of the
engine’s many parts will still be below optimum
temperature even when
the temperature gauge says it is hot. This
low temperature condition
will continue until a substantial load is placed
on the engine.

Moral of the story is DON’T RUN UNDER LIGHT
LOAD VERY OFTEN OR FOR
VERY LONG. A few minutes of idle is
recommended on start up and
before shut down.

If any of this is incorrect please let me
know.

Bill
Sailing F-36 #46 (1986) Hard Earned out of
New Bedford Yacht Club
Padanaram, MA







Yahoo! Groups Links










\

Posted by Jacqui MacConnell (jacimacc@…>)

Whomever ran my engine for the last eleven years must
have followed those procedures. Purrs like a kitten,
leaks nothing.
You can definitely tell. Cheers, ‘captain’ jacqui
mac, Sparrow




– Brian Guptil <sailordude@…> wrote:

Bill is correct.

The truckers that let there engines idle will pay
the price of fuel dilution
of the lube oil and eventually polishing of the
cylinders which leads to
burning oil. Most of them are doing that for heat
in the sleeper. Some
have APU’s to do that rather then to put ware and
tare on the main engine.

Engine warm up is recommended but not necessarily to
operating temp, get
underway and keep the load light till maybe 20
minutes out. Long periods of
idle, like to charge batteries of refrigeration is
the worst thing you can
do to a diesel. Though you need not necessarily
operate at 95% of rated
continuous to keep the engine loaded, running at 80%
of max RPM is very
reasonable. It the engine is overheating or
underheating, you have some
troubleshooting and work to do.

Brian Guptil
mailto:sailordude@...
sailordude@…

-----Original Message-----
From: Don Young [mailto:donzenet@…]
Sent: Sunday, March 06, 2005 7:17 AM
To: freedomyachts2003@yahoogroups.com
Subject: RE: [freedomyachts2003] Re: Diesel engine
operation

My understanding, as well. However, pulling into a
“truck stop” fuel
station always reveals several big rig trucks doing
just that - engine at
idle for hours at a time.

Don

-----Original Message-----
From: Michel Capel [mailto:mike_c_f35ck@…]
Sent: Friday, March 04, 2005 7:41 AM
To: freedomyachts2003@yahoogroups.com
Subject: [freedomyachts2003] Re: Diesel engine
operation

Bill,
This is what they told me also about diesel engines.
Mike

— In freedomyachts2003@yahoogroups.com, “William
A. Cormack”
<wacormack@w…> wrote:

In the last week or so someone stated that they
were relying on
their temperature gauge to indicate that their
engine was operating
efficiently and at high enough RPM to prevent undue
wear.

From what I have been told this is not a good
idea. As with your
car’s engine, the thermostat restricts the flow of
cooling water to
bring coolant temperature up to normal as quickly as
possible. This
can happen even at idle RPMs However, the
temperature of the
engine’s many parts will still be below optimum
temperature even when
the temperature gauge says it is hot. This low
temperature condition
will continue until a substantial load is placed on
the engine.

Moral of the story is DON’T RUN UNDER LIGHT LOAD
VERY OFTEN OR FOR
VERY LONG. A few minutes of idle is recommended on
start up and
before shut down.

If any of this is incorrect please let me know.

Bill
Sailing F-36 #46 (1986) Hard Earned out of New
Bedford Yacht Club
Padanaram, MA

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