I have a 2000 landcruiser 100series that when towing and going up a steep hill it overheats.We have had the head done on it a new waterpump and radiator had a new clutch fan put on.
We dont want to get rid of the car but we dont want to spend any more money and its still is stuffed.also the aircon cuts out when we go over 100kms or if we r towing it cuts out over 90kms.please someone help me
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are you shifting into a lower gear when starting to go up the hill you should use the transmission when doing this no matter how steep the hill is because this will stop the overload on the transmission , maybe time for tune up ,? , do u also have a towing switch in you vechil I do not know what u are towing with , no listed in your question
diesel engines have loads of pulling power(towing/loaded)but you need to use the gears to keep the revs at peak torque.1st is a crawler gear(very low ratio).put car in 3rd going down steep hills saves the gearbox overheating.....
Sounds more like an ignition control or coolant flow problem. Or, a/c fan not coming on with a/c. Getting the water pump question out of the way, the pump either works or not. If it leaks it will cause an overheat due to coolant loss on flat ground or grades...doesn't matter. If the pump bearing or seal is bad it will still pump, it will just be loose and noisy. Coolant flow through the radiator is also essential...I don't think you have a problem there because generally this happens with less maintained higher mile cars. A bad map sensor can cause your problem because it changes both ignition timing and fuel mixture, either of which can cause very high temps in combustion chambers especially when under a load. Mass air flow sensor can also do this but usually will cause idle problems. If fan is not on with a/c if the remainder of your cooling system may be enough to maintain decent temp control but cannot do this under a load. A/C turned off removes some load and therefore allow you to get up hills. Operating marginally, you can be pushing some coolant out of the system at times without even knowing it. Now, about your engine: These engines are in my opinion a very poor design to begin with. Even with the best maintenance and low miles, they don't handle temperatures well. at this point, I'd be concerned that after repeated overheats and near overheats, your head gaskets may have started to fail, even though they were not the cause of the problem.Keep that in mind. Have the items I mentioned tested. If you finally have the problem solved I suggest you change the thermostat as well...Overheating makes them unreliable.
overdrive is used when you are trying to accelerate going up a steep hill. have you ever noticed when you are going up a hill that you can not maintain speed? hit this button and you wount need to floor it
If you are "lugging" the engine, you will get increased exhaust temperature (EGT), this will trigger your "turbo" light(not a good thing), ideally you should have an aftermarket "pyrometer" fitted to your car, this will show you the optimum revs etc you should be using in any given circumstance.Or revise your driving technique, ie change down gears earlier.
The turbo should be idled down after long trips or heavy towing, this allows the oil temps to stabilise and turbine speeds to stabilise, thus idle for 2-5 minutes.
Hi. It is a well known problem on VWs you need to let all the air out , your car should have a valve to do this but if you can not find it try leaving the antefrezze cap of and watch for bubles coming out the water ( with the engine runing ,, ) cold