Vehicle & Technical > Discovery

V8 over heating

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Skibum346:
Disco,

Good point, but if the thermostat sin't fully closed, coolant flow is restricted, stays in the hot part of the engine longer and the radiator has to work harder to dissipate the heat.

For the cost of a thermostat and 5 minutes with a spanner it's a good thing to start with.

Up to you.

Good luck

Skibum

suggs:
i had this problem was the thermostate ive removed it completly now, also could be the water pump on its way out, not circulating the coolent propley..does it overheat when your moving or only when your in traffic

silly question but i take it the rads clean, not been off roading recently

could even be the rad cap on the F&E tank..

H

Range Rover Blues:
It's not so much the lean mixture that causes the overheating as the fact that the fuel is burning too late and therefore doesn't yeild as much power, subsequently you burn more fuel.  Consumtion any better now by any chance?

But you are right though, it would cause it.

So your engine is still full of water when it boils over? I think the weather has a lot to do with that, if it was getting warm a few months ago it will be going over the top now, you're not the only one to find that.

You said your rad is fine but have you flushed the system?  Does it over heat when stood or moving?

Mine got very hot today and I notice the fan got noisey.  Does your viscous fan make a noise when you first start then go quiet? it should start making that noise again as it get too hot, if not the fan isn't working properly.

disco-v8:

--- Quote from: "disco-v8" ---
 dodgy vacuum advance and it was just sucking, so would have bin making the fuel mixer lean and running hot.... asoon as that was fixed the car ran great and with better MPG aswell...
--- End quote ---



like i said before after i fixed the vacuum advance it got better MPG...



the radiator is definatly clean, because i took the whole of the front end of so i could clean it down with a hose pipe.  i could do an engine flush but im sure thats not going to do it, i just no these things and its not rite!!!!

ill change the thermostat tomorrow if i can get one localy, but the thought of the water pump not working was also i thought i had and it was getting the water around the system, but wouldnt that make a noise or soming where it had broke off?????

it doesnt matter if im driving or standing still after about 40mins the temp just goes up and wont come back down untill i pull up and let it cool down.... also its not the hot weather thats doing it because ive bin out in hotter weather down leciester when i went off roading for the first time and i wasnt moving that fast, and it never over heated then, and thats when i had my dodgy vacuum advance on!!!!

the viscus fan deffinatly does the fast spin when started beacause i like the sound of it untill it dies down, but im not sure if it does it when it hot??? but i dont think that matters as i never noticed it before when it didnt over heat and now it is over heating.... im deffinatly sure its something else!!!!!

thanks for all the help tho :)

disco-v8:
ok i took the hole of the thermostat off today to see if that was the course of my over heating problem.....


i went for a long drive and even went down to my local landrover parts place to get a new thermostat ( £4.90 with gasket) and everything seemed great, was driving lovely, no over heating.. then suddenly at a set of light just as i pulled up to a stop, the revs went abit crazzy on me, it shat to about 1500 then droped below 500 then back up to 1500 then droped to less then 400 then it died on me......

i waited untill the lights changed then started it and pulled off, i then looked at my temperature gauge and it was rising again  :evil: looks like i may have needed a new thermastat but its not going to be the solution to my problem!!!!!


help is needed badly now!!!!!

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