block heater

[Cummins crusher]

It's not do much so it starts but it's way better fit your motor & less warm up time equals less fuel plus faster heat 30 degrees f takes a lot to heat up a diesel after sitting all night and in upstate ny 8-10 hours a night isn't really noticeable in my nyseg electric bill


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[redwngr]

GM's opinion is use it below 0*F.

Engine Heater
The engine coolant heater can
provide easier starting and better
fuel economy during engine
warm-up in cold weather conditions
at or below −18°C (0°F). Vehicles
with an engine coolant heater
should be plugged in at least
four hours before starting.
To Use the Engine Heater
1. Turn off the engine.
2. Open the hood and unwrap
the electrical cord. The cord
is located in the engine
compartment, on the
passenger's side of the vehicle,
near the right side auxiliary
battery.
3. Plug it into a normal, grounded
110-volt AC outlet.
{WARNING
Plugging the cord into an
ungrounded outlet could cause an
electrical shock. Also, the wrong
kind of extension cord could
overheat and cause a fire. You
could be seriously injured. Plug
the cord into a properly grounded
three-prong 110-volt AC outlet.
If the cord will not reach, use a
heavy-duty three-prong extension
cord rated for at least 15 amps.
4. Before starting the engine, be
sure to unplug and store the
cord as it was before to keep it
away from moving engine parts,
and prevent damage.
The length of time the heater should
remain plugged in depends on the
outside temperature. You may wish
to use the coolant heater to improve
ease of starting at temperatures
between −18°C (0°F) and −29°C
(−20°F). Keep the coolant heater
plugged in for a minimum of four
hours. At temperatures below −29°C
(−20°F), the coolant heater should
remain plugged in for at least eight
hours. It will not harm either the
coolant heater or the vehicle to
leave the coolant heater plugged in
longer than the times stated. Be
sure to remove and store the cord
before starting the engine. See Fuel
for Diesel Engines on page 9‑16 for
information on what fuel to use in
cold weather.

[dmetcalf]

Mine originally came from dealer in the Houston area and it does have one.

[cleandirtymax]

i dont know whats up with mine.. truck has 1100 miles on it. ive been using the heater for a week. temps are starting to get between -2 to -17 and now the heater isnt working. figure it must have been the cord so i went and got a 12 ga winter cord and park closer to the building. i plug it in over night and when i go to start it in the morning it reads literally 1/8th over cold. (so like 170*) before it was almost up to temp.. did i break it? haha

[gr8shot]

If it shows any temp on the gauge at all after having it plugged in, then its working. When temps get colder its obviously harder to keep the block warm so it won't maintain as high of a temp as before.

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