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This is my first diesel with a block heater although I have driven a diesel vw jetta for 8 yrs with no block heater... say for instance my 02 X psd was gonna sit outside in a normal chicago winter for 2 days should I :
A. keep it plugged in for the whole time its outside
B. plug it in 2 hrs before I am gonna leave
Not really sure which is the lesser of 2 evils on the heater system. BTW on my diesel 98 jetta(145k) when its really cold i give it the old 3 cycles of the glow plugs.....lmk what you guys think on A or B
If the batteries and GP system are working correctly, all it will take is a few cycles for it too. If it does need to be plugged in, option B. will be sufficient.
It takes about 2 hours as you say, to heat up the motor. If you have the time to plug it in 2 hours before use, you will save a small amount in elec. cost, but otherwise, just leave it plugged in from the time you return home until its next use, and you are ready at any time.