Well,

Winter ends and the summer is comming and with that the infamous temperature issue...

After change all the inexpensive things (the thermostat, put the Nakatenga's fan extension, etc) without solve the problem completely, I decide to buy a new uprated radiator from Allisport to solve the temperature problem definitely (I hope).

So the order is on the way (Christmass present for the Defender) ad should be installed during the 1st week of January to be tested during our summer (Jan-Feb).

If this doesnt solve the problem I will run absolutely out of ideas.

I will keep you informed

Cheers to all Eduardo

MY 2007 110 SW PUMA 2.4: Big Fog of 64'
MY 1994 Jayco 1207 Folding camper: "El Tremendo"

Click image to enlarge

What fluid do you have in there? Made In GB. 🇬🇧

Watts ÷ Volts = Amps.
Amps X Volts = Watts

Nor sure about Defender's water pump efficiency but today I was looking at my Hilux 2.5 and I could tell the rad is probably 20% bigger. Hilux engine is std no remap and around same power and torque figures. Though the intercooler is not in front of the rad.

Have you thought on adding an aux fan? You can probably fit a sender at your spec. Puma 110" SW

.............................................................
Earth first. Other planets later

custom90steve wrote:

What fluid do you have in there?

Ethylene-Glycol based coolant, local made compatible with TL 774F 50% dilution.

According to the manual should be Texaco XLC (also ethylene glycol) which is also compatible with the TL 774F in 50% dilution

Cheers Eduardo

MY 2007 110 SW PUMA 2.4: Big Fog of 64'
MY 1994 Jayco 1207 Folding camper: "El Tremendo"

Click image to enlarge

MK wrote:

Nor sure about Defender's water pump efficiency but today I was looking at my Hilux 2.5 and I could tell the rad is probably 20% bigger. Hilux engine is std no remap and around same power and torque figures. Though the intercooler is not in front of the rad.

Have you thought on adding an aux fan? You can probably fit a sender at your spec.

Humm, if the new radiator fails, probably that should be the way...


Thanks Eduardo

MY 2007 110 SW PUMA 2.4: Big Fog of 64'
MY 1994 Jayco 1207 Folding camper: "El Tremendo"

Click image to enlarge

Stupid question, have you changed the viscous hub?. No offense but you guys have no idea about hot weather, both our Defenders have worked in 50 degree Celsius heat for weeks on end, but the fan MUST work.

PAT303

Viscous was replaced around 2-3 years ago.

BTW the problems occurs only with heavy load (as a family of 6 with all the gears), at high temperatures (over 30°C), high speed (120 kph) in mild but long slopes (that are common here in Chile and probably not in Australia).

Otherwise temperature is not an issue.

Cheers! Eduardo

MY 2007 110 SW PUMA 2.4: Big Fog of 64'
MY 1994 Jayco 1207 Folding camper: "El Tremendo"

Click image to enlarge

Do you have a cat fitted, that would be the first thing to remove.
I have had the same problem as you and have put it down to exhaust temp under load.
Fit a pyrometer and keep an eye on it.
I can drive mine and make it boil or watch the temp on the real time analogue gauge I have fitted and back off when temps rise.
Mark

Eduardo wrote:

PAT303

Viscous was replaced around 2-3 years ago.

BTW the problems occurs only with heavy load (as a family of 6 with all the gears), at high temperatures (over 30°C), high speed (120 kph) in mild but long slopes (that are common here in Chile and probably not in Australia).

Otherwise temperature is not an issue.

Cheers!

Look at the side vents in that link.

Eduardo wrote:

BTW the problems occurs only with heavy load (as a family of 6 with all the gears), at high temperatures (over 30°C), high speed (120 kph) in mild but long slopes (that are common here in Chile and probably not in Australia).

Are you using 6th gear or gearing down to 5th? --

2010 Defender Puma 90 + BAS remap + Alive IC + Slickshift + Ashcroft ATB rear
2015 Range Rover Sport V8 Supercharged



Defender Puma Workshop Manual: https://bit.ly/2zZ1en9
Discovery 4 Workshop Manual: https://bit.ly/2zXrtKO
Range Rover/Sport L320/L322/L494 Workshop Manual: https://bit.ly/2zc58JQ

Eduardo wrote:

Well,

Winter ends and the summer is comming and with that the infamous temperature issue...
After change all the inexpensive things (the thermostat, put the Nakatenga's fan extension, etc) without solve the problem completely, I decide to buy a new uprated radiator from Allisport to solve the temperature problem definitely (I hope).
Cheers to all

Eduardo, I had exactly the same problem as you. Hills, high air temp, revs. But the clue was hills (and suggestions from the forum members) that my coolant was low. Is yours at the right level? No blockages or air bubbles? It sounds so similar. I topped mine up and now keep a regular eye on the level, and never had the problem occur again. Also gave the MAF a clean at the same time, but coolant was the key, it was low. Add the hills and it just seemed to accentuate the 'level' whereas flat roads seemed to be ok. It was obviously on the threshold for the ECU to turn on the limo mode.  Monsieur Le Grenadier

I've not been everywhere, but it's on my list.....

2011 Puma 110DC - Corris Grey

Big Harold wrote:

Do you have a cat fitted, that would be the first thing to remove.
I have had the same problem as you and have put it down to exhaust temp under load.
Fit a pyrometer and keep an eye on it.
I can drive mine and make it boil or watch the temp on the real time analogue gauge I have fitted and back off when temps rise.
Mark

I cannot take out the catalizer (MOT restrictions in the city)
I have also a temp readed connected to the ODB So I can low the gear when the temp goes up to 105°C but is quite anoying in special in the long trips. Eduardo

MY 2007 110 SW PUMA 2.4: Big Fog of 64'
MY 1994 Jayco 1207 Folding camper: "El Tremendo"

Click image to enlarge

PAT303 wrote:

Eduardo wrote:

PAT303

Viscous was replaced around 2-3 years ago.

BTW the problems occurs only with heavy load (as a family of 6 with all the gears), at high temperatures (over 30°C), high speed (120 kph) in mild but long slopes (that are common here in Chile and probably not in Australia).

Otherwise temperature is not an issue.

Cheers!

Eduardo, my advise, cut some gills in the front guards like the Range Rover, what you want is more airflow through the rad, owners have done it here and it makes a huge difference. https://www.google.com.au/url?sa=i&sou...2908023534

Thanks for the idea
If the radiator fails I will study to do it Eduardo

MY 2007 110 SW PUMA 2.4: Big Fog of 64'
MY 1994 Jayco 1207 Folding camper: "El Tremendo"

Click image to enlarge