Over heating on motorway

ebbadger · Aug 12, 2013

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mick the builder said:
I have a new rad,water pump, and 88 stat ( not checked it with thermometer) and viscous fan with no cowl and mine runs hot when pushed and hotter when towing.

same initial advice... take stat out n try, a stat can appear to open but not be opening enough... eliminate the cheap options first

cheers steve

mick the builder · Aug 12, 2013

I think i will try that Steve. I always used to run my old fords with the stat out.

mrchurchill109 · Aug 13, 2013

I wouldn't run with the stat out except in case of need. Maintaining the engine at its operating temperature will help in operation and economy. My 110 had no stat in it when I got it and ran like crap - swapped in a stat and the heater worked a whole lot better and my fuel mileage went up...wonder why?

One question I might ask that I don't believe I've seen here is about the hoses - how soft and squidgy are they? If the flow is a bit down on the radiator and the pump is healthy I wonder if you could be sucking a hose flat and losing flow that way.

ajr

puffin1 · Aug 13, 2013

Mine does that heats up under load at 65-70mph drop back to 55mph and back to normal . Guy at the garage with 30 years in landy's says it is pretty normal . so i just slow down till it drops to normal .

ant.7 · Aug 13, 2013

my 300tdi disco used to do the exact same thing.
i replaced the rad after seeing only a few fins missing, when i replaced the rad the fins all fell out!

now she runs great at just below half way on the guage even when towing up hill!

link below is the rad i bought.

LAND ROVER DISCOVERY DEFENDER 300 TDI RADIATOR BTP2275 | eBay

chunkymunky · Aug 13, 2013

Also consider an additional kenlow thermostatic fan. Fitted to radiator increasing flow.

ebbadger · Aug 13, 2013

mrchurchill109 said:
I wouldn't run with the stat out except in case of need. Maintaining the engine at its operating temperature will help in operation and economy. My 110 had no stat in it when I got it and ran like crap - swapped in a stat and the heater worked a whole lot better and my fuel mileage went up...wonder why?

One question I might ask that I don't believe I've seen here is about the hoses - how soft and squidgy are they? If the flow is a bit down on the radiator and the pump is healthy I wonder if you could be sucking a hose flat and losing flow that way.

ajr

not suggesting for one minute running without one full time, simply remove and test to eliminate it as a possible, only takes 5 minutes and costs nothing apart from a bit of instant gasket

cheers steve

Over heating on motorway

ebbadger

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mick the builder

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mrchurchill109

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puffin1

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ant.7

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chunkymunky

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ebbadger

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