Yesterday and today I've worked on the SDL trying to figure out why it is overheating. Yesterday, I first checked to see if the fan clutch was engaging, it's not.....well, the radiator isn't hot enough to cause the clutch to engage. Lower hose is cool to the touch, top is HOT. I am also not getting very much heat in the cab when I select defrost and MAX temp. Hrm, so I drained all of the coolant and started pulling some of the system apart and noticed this red, gritty grime coating the inside of EVERYTHING. Hrm, wonder if the PPO (previous-previous owner before Kaleb) tried some of that block/head/radiator sealer? I have modified the old thermostat to be mostly open all the time. Could the cold bottom/hot top problem be a bad water pump and how would I check that?
-- Luther KB5QHU Alma, Ark '87 300SDL (270,491 mi) head case? '83 300SD (241 kmi) '82 300CD (162 kmi) '82 300D (74 kmi) needs MAJOR engine work '85 300D (280,176) parts car
