defender running hot

'91 Defender · Aug 19, 2011

Have taken my defender on its first run in a couple of months and its running past halfway on the temperature gauge. Still in the white area but not by much! There is water, the fan is running, there is no heavy load.

The only things changed are the tyres and a light fuel pump tweak. The tyres made no difference to running temps on my disco so can't see why it would on the defender. Both are 200tdis with the same gear and transfer box. The disco was also highly tweaked. There is also no binding brakes or hand brake.

Does anybody have any suggestions?

Btw its a 200tdi utility on 265\75 turbo dakars.

lanny man 90 · Aug 19, 2011

'91 Defender said:
Have taken my defender on its first run in a couple of months and its running past halfway on the temperature gauge. Still in the white area but not by much! There is water, the fan is running, there is no heavy load.

The only things changed are the tyres and a light fuel pump tweak. The tyres made no difference to running temps on my disco so can't see why it would on the defender. Both are 200tdis with the same gear and transfer box. The disco was also highly tweaked. There is also no binding brakes or hand brake.

Does anybody have any suggestions?

Btw its a 200tdi utility on 265\75 turbo dakars.

radiatior full of dry mud maybe???

blue beasty · Aug 19, 2011

lanny man 90 said:
radiatior full of dry mud maybe???

partly blocked rad? sticky thermostat?

When she's up to temp are the top and bottom hoses the same sort of temp?

Probably worth whipping off the hoses and flushing it through

Jamie90 · Aug 19, 2011

Mine was the same doing the same when i was doing about 65 on a long trip, i just took the grill off and cleaned all the mud and insects out of the rad an it has not done it since.

'91 Defender · Aug 20, 2011

Thanks for the suggestions guys. Radiator is clean. Going to check the thermostat today. I can only do the basics as I am on holiday!

'91 Defender · Aug 21, 2011

Both rad lines hot, loads of coolant, Fans working and still wanting to overheat

jamesmartin · Aug 21, 2011

have you felt radiator surface all over cooler spots show where its not cooling

johns90 · Aug 21, 2011

You can tell its summer. People will be bragging about this come winter.
If you put the interior fan on does that effect it? I had a non landy years ago and did this as a short journey get me home trick.
Good luck

'91 Defender · Aug 21, 2011

Radiator is cool all over, but have been stopped for a while now at a services. My heater is permanently on hot so have refrained from fan useage but will give it a go.

ricc · Aug 21, 2011

if rad is cool all over after a run it suggests water aint gettin through it., either blocked rad or nacked water pump.....

'91 Defender · Aug 21, 2011

Can't imagine the radiator failing suddenly? Any easy way to check the pump?

'91 Defender · Aug 21, 2011

Scratch that, its wet and noisy. Hello new pump time.

jamesmartin · Aug 21, 2011

anybody with an aluminum head should check it ,feel pipes they shoul harden when engine revved

'91 Defender · Sep 1, 2011

Cheers for the suggestions guys. Can't actually find whats going wrong as the engine isn't actually getting very hot, so throwing in a new stat and temperature sender for good measure

defender running hot

'91 Defender

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lanny man 90

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blue beasty

Leaks an prone to bits dropping off

Jamie90

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johns90

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ricc

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