Vehicle & Technical > Discovery

overheating, need advice!

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MudRat:
no water loss, no oil mixing, heats up on motorways when doing 70 for a little while, slow down, heating on full blast, temp drops, washed out the rad (very muddy) what else ???

DiscoCWK:

--- Quote from: "MudRat" ---no water loss, no oil mixing, heats up on motorways when doing 70 for a little while, slow down, heating on full blast, temp drops, washed out the rad (very muddy) what else ???
--- End quote ---


Thermostat could be jammed

stick it in a pan of water and see if it opens when the water gets hotter

Skibum346:

--- Quote from: "DiscoCWK" ---
--- Quote from: "MudRat" ---no water loss, no oil mixing, heats up on motorways when doing 70 for a little while, slow down, heating on full blast, temp drops, washed out the rad (very muddy) what else ???
--- End quote ---


Thermostat could be jammed

stick it in a pan of water and see if it opens when the water gets hotter
--- End quote ---


Or just take it out altogether and see what happens... cost somethng like a fiver so I'd be tempted to do it anyway!

Could also be your ater pump vanes have worn down too far... they aint expensive either...

beast5680:
could also be the rad clogged internally restricting water flow or the viscous fan failing

Mark2Disco:
mine did the same
65 mph on motorway was ok
70mph on motorway overheated instantly
rad clogged with mud
must have taken an hour to clean with hose on full blasting it from the front and back of the rad
and got a bucket full of mud out of it
been fine since
hope yours is the same

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