Plugging in the block heater to make the engine start points to two
possible problems.
The heating of the engine by the block heater is enough to cause the
fuel to vaporize faster, makes the fuel warmer, taking a major burden
off the glow plugs to start the engine .... I would remove the glow
plugs and the ones with a black tip indicate duds .....
The short time the glow plug light is on, after trying several times
to start the engine, might indicate a glow plug relay is not operating
as designed... Wait a couple of hours and then turn the ignition key to
start, after awhile the light will go out and then wait for a clicking
sound,around 20 seconds, this sound tell you the relay is open and
interrupts current flow to the glow plugs....Tip in cold weather, Do the
above three times or more in cold weather to start the diesel. Started
my 300 TD at -5F without a block heater.... Another tip: use a hair
dryer blowing over the injectors and fuel line to start in cold weather
takes about 20 minutes to work
Bill
1981 300 TD
Curt Raymond wrote:
Randy,
My first thought was gelled fuel but if it started with a warm block thats
probably not it.
My 240D would start at pretty much any temp down to freezing even without
glowplugs, it wasn't happy about it, it'd need to crank for longer than I liked
and it'd belch black smoke when it started but it did start...
So yeah, maybe its time to replace glowplugs and adjust the valves. Give it a
shot of isopropyl alcohol to sequester any water in the tank and maybe a shot
of anti-gel just in case.
Probably also a good time for new fuel filters and at least check the airfilter
too...
-Curt
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