August 25, 2005i'm working on a 95 psd thats been over heating when pulling hills or small loads. i've tried the water pump,thermostat,fan. theres no blockages in the rad, in side or out.the owner says he's been having too add coolant often but it never got that hot that it pushed out. the temp would jump up/down like air in the thermostat. i pulled the heads last night and cant see anything evident of where it was leaking. the truck has 200000 miles is there anything else that should be checked? thanks for any help.
Forums : Engines-Diesel : 95 psd over heating (134 Views)
August 25, 2005it could be a cracked injector cup leaking, does it smoke at all?
August 25, 2005A diesel will overheat under load if there is not enough air flow (Volumetric Efficiency). It has been noted that an old or partially clogged muffler or improperly operating turbo will reduce the air flow requiring excessive fuel. Without sufficient air flow there is no place for the heat to go except through the cylinder walls to the coolant. A faulty injector will result in an unbalanced load. The resultant effect of an unbalanced load is to overheat the engine. Improper injector timing will also cause the engine to overheat. Man this could just go on and on.
August 25, 2005no the truck didnt smoke at all.the truck ran great. it seems to rev alot faster than any other psd that i've drove. it almost seems like a car when you advance the timing to advanced. what adjusts the injector timing on these? CPS/IDM? the heads are getting checked for cracks right now. thanks for the info.
August 26, 2005well the pcm adjusts timming so the chances of that being off are very slim. is there a chip in the truck? how about egts does he have a gauge and how high do they go when it overheats?