| Author | Message | ||
     Douglas McMillan (Mcmillan) Member Username: Mcmillan Post Number: 53 Registered: 06-2002 |
I've read a few threads on this subject but didn't see any real conclusions. I have a 94 disco (manual) and find that on hot days the temp climbs really high. It is fine at idle speed and only when I seem to be cruising (and possibly climbing a hill) does the temp climb. I believe that this would eliminate the viscous fan/clutch from the equation. I can switch on the heater and crank the fan up which dropps the engine temp (does not do a lot for the driver though). I checked the coolant level and that is fine. On the way home from work I come to a stop sign on a down hill stretch and the temp drops to half way and remains there steady, does not rise again. Any thoughts? PS I have about 97,000 miles on the clock. Is this likely to be a timing issue causing the engine to get excessively hot? I checked the timing and it seemed in spec. Is the Thermostat shot? Does the large spot lights on the brush bar prevent enough air from entering the radiator? Could it be the temp sensor? Is there something else I should check? | ||
| Curtis N (Curtis) Dweb Lounge Member Username: Curtis Post Number: 575 Registered: 05-2002 |
Sounds like a sticky thermostat. Start there because it is simple and cheap. | ||
| trevor griffiths (Trevorgriffiths) Member Username: Trevorgriffiths Post Number: 129 Registered: 11-2002 |
try checking for debris in front of the radiator, between the condensor and the rad. There is rubber seal across the top of the radiator and if yo pull it back, you can see into the opening with a flash light. If it is in need of some attention, unbolt the two upper mounting bolts and push the radiator backwards to fit the vacuum cleaner or compressed air nozzle down there. | ||
| Charles Allen (Callen229) Member Username: Callen229 Post Number: 58 Registered: 07-2002 |
I had the same symptoms. 1994 Discovery 140,000 miles. Gets hot going up hills with the AC on. Turn on the heat and temp goes down fast. I checked the timing and it was good. I changed the thermostat, no help. I had the radiator rodded out, no help. I got a used viscous fan clutch from a junk yard and it seems to have solved the problem. Yesterday I went up to Mt. Mitchell (6000 ft elevation) here in Western NC with 4 people in the Rover and the temp guage did not budge. From what I learned there is no scientific method to figure what is failing. You just have to start changing parts and hope you get lucky before you spend a lot of cash. Charles | ||
| Tony Zuniga (Tony23007) Member Username: Tony23007 Post Number: 143 Registered: 05-2003 |
I agree with Charles, my overheating disco problem was dissapeared, come back, dissapeared again and now I have it back even worst. I have the same sympthoms as you do, overheats during heavy climbs or heavy acceleration, once on highways speed it levels out. I've changed all the sensors, Coolant, sending unit and even the fan switch, it all worked for a day or two then the temp went up again, I just changed my t-stat again and no help. I am moving on to the Viscous Unit and will post results once I have changed that unit!!!! |
