D2a TD5 Over Heating

[TAHAIC]

I just fitted a Madman and I am very happy that I did. When I put my foot down mildly (just enough to maintain my speed) going up a mild to moderate grade that's 800 meters or longer type thing, my coolant temp goes up from 107C to 111C and Madman starts alarming!

I have been driving around allot harder than this before I installed my Madman with no issue of the stock temp gauge getting too hot but obviously there is problem! That's scary!

I bought the car last year about 10 months ago, I have been all over it and sorted most things out. It came from a 1 owner and has a full service history which shows that it did over heat and the owner said the engine management system shut it down in August 2012.

It was towed in and repaired at its normal place of service by an land rover specialist company. Over heating was due water pump and power steering dog drives sheared off (what ever that is) and secondary fault at thermostat. New power steering pump, water pump and thermostat fitted.

Then in August 2013 radiator and hoses replaced due to over heating.

When I bought the vehicle in November 2015 I did heaps of things to it including an engine oil flush using cost effective maintenance products plus I dropped the sump and check oil pump bolt so I know the engine is clean. I also did a complete coolant flush and auto mega oil flush with filter etc. and heaps of other things.

Has anyone got any idea why my temp is going up to 111C - when it does and the alarm goes off I back off the gas immediately and it cools back down to 107C in a minute or 2. It would probably go higher if I continued to keep my foot on the gas all though I haven't been game enough to try that yet.

Any help or input is appreciated thank you all.

TAHAIC

[SPROVER]

I just fitted a Madman and I am very happy that I did. When I put my foot down mildly (just enough to maintain my speed) going up a mild to moderate grade that's 800 meters or longer type thing, my coolant temp goes up from 107C to 111C and Madman starts alarming!

I have been driving around allot harder than this before I installed my Madman with no issue of the stock temp gauge getting too hot but obviously there is problem! That's scary!

I bought the car last year about 10 months ago, I have been all over it and sorted most things out. It came from a 1 owner and has a full service history which shows that it did over heat and the owner said the engine management system shut it down in August 2012.

It was towed in and repaired at its normal place of service by an land rover specialist company. Over heating was due water pump and power steering dog drives sheared off (what ever that is) and secondary fault at thermostat. New power steering pump, water pump and thermostat fitted.

Then in August 2013 radiator and hoses replaced due to over heating.

When I bought the vehicle in November 2015 I did heaps of things to it including an engine oil flush using cost effective maintenance products plus I dropped the sump and check oil pump bolt so I know the engine is clean. I also did a complete coolant flush and auto mega oil flush with filter etc. and heaps of other things.

Has anyone got any idea why my temp is going up to 111C - when it does and the alarm goes off I back off the gas immediately and it cools back down to 107C in a minute or 2. It would probably go higher if I continued to keep my foot on the gas all though I haven't been game enough to try that yet.

Any help or input is appreciated thank you all.

TAHAIC

I wouldn't call 107 cool. Are you sure you haven't got a blocked radiator or thermostat? That is running way to hot. Normal running temp for my td5 is about 85.

[thai_tiger]

^+1 also check viscous fan

[sierrafery]

Try to stop the viscous fan with a rolled newspaper when the engine is hot...if you can put new one, at 110*C the electric fan is supposed to kick in to help cooling so if it didnt you should see if that works or not or check the madman's accuracy with thermometer, the original gauge is going to the middle at 70 an stays there untill 120 so quite useless

[justinc]

Is this cyl head temp or coolant temp?

[TAHAIC]

Is this cyl head temp or coolant temp?

Its coolant temp.

[TAHAIC]

I wouldn't call 107 cool. Are you sure you haven't got a blocked radiator or thermostat? That is running way to hot. Normal running temp for my td5 is about 85.

Yes you are right, too hot I agree!

[Mark C]

Does the displayed temperature drop when the engine stops running ? (with the key in the accessory position)

[TAHAIC]

Try to stop the viscous fan with a rolled newspaper when the engine is hot...if you can put new one, at 110*C the electric fan is supposed to kick in to help cooling so if it didnt you should see if that works or not or check the madman's accuracy with thermometer, the original gauge is going to the middle at 70 an stays there untill 120 so quite useless

I haven't tried the rolled up news paper yet but the viscous fan turns easily with engine off and bearing feels smooth.

The thermo fan kicks in at 110C ? really ? Wow that seems too hot to me! I checked it this morning driving to work (about 50km down the highway) and after 10 min or so it was still not on but when I got to work it was on. Temp was still around the 107C mark on madman so that seems to indicate that the madman temp sensor is correct (round about). Would be good to chek it against a Nanocom.

Totally agree that the stock gauge is fairly useless!

[TAHAIC]

Does the displayed temperature drop when the engine stops running ? (with the key in the accessory position)

Yes it does.