greetings, i need some help diagonsing my 83 300sd @150k.

in warmer temperatures (the charlotte area of nc) the car fired right up with no problems. now in the colder Appalachians where temperature have been anywhere from 10-30 degrees F, the car takes nearly an hour to start. of course this is done with another car jumping it as the battery quickly wears down.

i have tested the ohms to the glowplugs as well as affirmed that the relay and wire were getting power to the glow plugs. all were receiing at least 11.40 ohms. nevertheless, the all symptyms lead me to believe that there is a glow plug problem. thoughts?

[i have ordered a 300watt magnetic block heater and i hope that this will ease many of my winter woes. I am also using anti gel diesel additive.
new battery, new air oil and fuel filters, new oil]


i also recieved a crack in the plastic top of the radiator and spewed all a my radiator fluid while running it. i have heard that this 2 1/2 inch crack can be filled with steel reinforced epoxy, however i wonder if there is something else wrong with the radiator that i should check into before patching adn refilling.

prior to this instance, my on dash temperature gauge read 120degrees thought the engine on touch was not nearly that hot. the gauge needle has been fluttering hinting at an electricle problem. it pulses at the same rate as the light on the stereo and other gauges and lights on the dash. perhaps my thermomitor of the raditor is stuck open or the cold weather is reaking havok on the old plastic radiator top.

reccommendations?