 | Home > Puma (Tdci) > Too low Coolant temps? (Warm climate overheat..) |
 
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| Beery Member Since: 16 Nov 2014 Location: NSW Posts: 36   
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Thanks mate, got a genuine LR one already from an online shop in NSW.
I'll put it in soon and see how it goes. I might also do the pot-on-stove experiment with it beforehand to see how much difference there is. Between that and the great big new allisport intercooler, things should be in good shape. Cheers Tom |
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20th Aug 2015 9:17am |
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| Beery Member Since: 16 Nov 2014 Location: NSW Posts: 36
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New thermostat in today. Test run all good
Didn't see temp go above 86 degrees at highway speed, ambient 15 degrees  |
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29th Aug 2015 6:41am |
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| Bergos Member Since: 08 Aug 2015 Location: Somewhere in Portugal Posts: 95  
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Hello,
I have been driving my 2007 Puma (110 HT) for 2 years. Long trips only. For the first year I had no issues at all. Fuel consumption - 10 liters /100 km (28-30 mpg). I've made 2 trips to Morocco, no problems. Last summer (2016) I had the a/c installed, made 5000 km no problem, bu then I had 2 or 3 power loss incidents while driving (Spain in summer). At that time I didn't make the connection with overheating. This year I went yo Mauritania and the overheating cut offs started to be everyday reality - 40+ degrees, sand... Every time the CHT sensor reached 115°C - power loss. I had to wait a few minutes for the temperature to drop to 88-90. In Portugal or Spain, on a highway I observe 95°-107°C. Sometimes it reaches 115 but not often. I have also noticed that the radiator is cold. Somebody suggested broken head gasket and exhaust fumes going to coolant. Coolant and oil levels are stable. Recently I have obserbef a decrease in fuel economy - 13l/100 km (21-22 mpg). I was attributing it to the roll cage and some weight increase on the car. Finally I put the 82°C thermostat - PEL500110. The temperatures are better, usually below 105°C on highway, summer, 130km/h. BUT the fuel economy went south to tragic 15l/100km (18-19 mpg). Is it possible that the thermostat is guilty here or the head gasket is dying? |
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5th Aug 2017 6:36pm |
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| Bergos Member Since: 08 Aug 2015 Location: Somewhere in Portugal Posts: 95
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Hello,
I have been driving my 2007 Puma (110 HT) for 2 years. Long trips only. For the first year I had no issues at all. Fuel consumption - 10 liters /100 km (28-30 mpg). I've made 2 trips to Morocco, no problems. Last summer (2016) I had the a/c installed, made 5000 km no problem, bu then I had 2 or 3 power loss incidents while driving (Spain in summer). At that time I didn't make the connection with overheating. This year I went yo Mauritania and the overheating cut offs started to be everyday reality - 40+ degrees, sand... Every time the CHT sensor reached 115°C - power loss. I had to wait a few minutes for the temperature to drop to 88-90. In Portugal or Spain, on a highway I observe 95°-107°C. Sometimes it reaches 115 but not often. I have also noticed that the radiator is cold. Somebody suggested broken head gasket and exhaust fumes going to coolant. Coolant and oil levels are stable. Recently I have obserbef a decrease in fuel economy - 13l/100 km (21-22 mpg). I was attributing it to the roll cage and some weight increase on the car. Finally I put the 82°C thermostat - PEL500110. The temperatures are better, usually below 105°C on highway, summer, 130km/h. BUT the fuel economy went south to tragic 15l/100km (18-19 mpg). Is it possible that the thermostat is guilty here or the head gasket is dying? |
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5th Aug 2017 6:36pm |
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| dgardel Member Since: 30 Nov 2008 Location: Veneto (Heart & Head) Posts: 3586 
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80-82degC is a good run. Normally Puma engine run hot for emissions reasons but 10 degree less it's better.... I have also the warm climate thermostat hard spring and my engine is happy now Discovery 5 td6 HSE Stornoway Gray Outback Engineering Limited Edition 
IID Pro MV License |
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5th Aug 2017 7:01pm |
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| pannawonica Member Since: 21 Nov 2010 Location: Clackline Western Australia Posts: 568
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What I have found with a 82'C soft spring thermostat, towing at 30'C ambient plus CHT sensor will still go too three figures! I am convinced the radiator lacks capacity. Some over here have fitted UK upgrade radiators too little effect. More radical approach me thinks is needed!
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6th Aug 2017 2:54am |
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| pannawonica Member Since: 21 Nov 2010 Location: Clackline Western Australia Posts: 568
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[quote="Bergos"]Hello,
I have been driving my 2007 Puma (110 HT) for 2 years. Long trips only. For the first year I had no issues at all. Fuel consumption - 10 liters /100 km (28-30 mpg). I've made 2 trips to Morocco, no problems. Last summer (2016) I had the a/c installed, made 5000 km no problem, bu then I had 2 or 3 power loss incidents while driving (Spain in summer). At that time I didn't make the connection with overheating. This year I went yo Mauritania and the overheating cut offs started to be everyday reality - 40+ degrees, sand... Every time the CHT sensor reached 115°C - power loss. I had to wait a few minutes for the temperature to drop to 88-90. In Portugal or Spain, on a highway I observe 95°-107°C. Sometimes it reaches 115 but not often. I have also noticed that the radiator is cold. Somebody suggested broken head gasket and exhaust fumes going to coolant. Coolant and oil levels are stable. Recently I have obserbef a decrease in fuel economy - 13l/100 km (21-22 mpg). I was attributing it to the roll cage and some weight increase on the car. What other heat mitigation mods have you done?
Finally I put the 82°C thermostat - PEL500110. The temperatures are better, usually below 105°C on highway, summer, 130km/h. BUT the fuel economy went south to tragic 15l/100km (18-19 mpg). Is it possible that the thermostat is guilty here or the head gasket is dying?[/quote] |
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6th Aug 2017 2:56am |
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| Beery Member Since: 16 Nov 2014 Location: NSW Posts: 36
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Bergos, I think driving to the conditions is the best advice I can give. Of course driving at 130km/h in 40+ degree temperatures in a Defender is going to cause sky high fuel consumption and overheating.
I agree with Pannawonica. I've installed the 82C thermostat too and it helps. But only when you are operating within the cooling system's capacity range (i.e. coolant flow, radiator capacity, airflow etc.) If you're going to keep driving in the same style then you'll want to look at improving engine bay airflow, decat, egr delete, changing glycol concentration to 30% and adding wetting agent, bigger radiator etc. Another thing worth trying, which I'm yet to do, is blocking the coolant flow through the heater tap. It's a bypass type, meaning there is a constant flow of coolant bypassing the tap when its closed. That means its also bypassing the radiator and getting sucked straight back into the pump and back into the engine. Your vehicle is ten years old. Has the cooling system ever been properly cleaned internally? Are the radiator fins clean? Have you checked that the viscous fan clutch is locking up properly? |
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6th Aug 2017 3:20am |
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| ericvv Member Since: 02 Jun 2011 Location: Near the Jet d'Eau Posts: 5816  
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Pannawonica, what do you mean by that? I never heard of the existence of a larger than standard cooling water radiator for the Puma. Or do you mean a larger upgrade intercooler maybe? Which is a different thing again, but the resulting lower air temps will further decrease engine running temps, but all within reason of course. I think heavy towing, running at 120 kph or higher for extended periods, all in the mentioned 40°C ambient temps will show the limits of any cooling system. Only solution in these circumstances probably is to adapt driving style. Eric You never actually own a Defender. You merely look after it for the next generation. http://youtu.be/yVRlSsJwD0o https://youtu.be/vmPr3oTHndg https://www.youtube.com/watch?v=_GtzTT9Pdl0 https://www.youtube.com/watch?v=ABqKPz28e6A https://www.youtube.com/watch?v=rLZ49Jce_n0 https://www.youtube.com/watch?v=XvAsz_ilQYU https://www.youtube.com/watch?v=K8tMHiX9lSw https://m.youtube.com/watch?v=dxwjPuHIV7I https://vimeo.com/201482507 https://www.youtube.com/watch?v=ZSixqL0iyHw |
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6th Aug 2017 5:16am |
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| Bergos Member Since: 08 Aug 2015 Location: Somewhere in Portugal Posts: 95
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I understand that driving 130km/h in hot weather is heavy for the engine. The thing is, that last year I was making 10l/100km and now it's 15l/100km. Same road, same driving style, same weather. Has anybody observed such a dramatic decrease in fuel economy after putting the PEL500110 thermostat? |
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6th Aug 2017 7:59am |
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| ericvv Member Since: 02 Jun 2011 Location: Near the Jet d'Eau Posts: 5816
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Makes no difference whatsoever with me.
Eric You never actually own a Defender. You merely look after it for the next generation. http://youtu.be/yVRlSsJwD0o https://youtu.be/vmPr3oTHndg https://www.youtube.com/watch?v=_GtzTT9Pdl0 https://www.youtube.com/watch?v=ABqKPz28e6A https://www.youtube.com/watch?v=rLZ49Jce_n0 https://www.youtube.com/watch?v=XvAsz_ilQYU https://www.youtube.com/watch?v=K8tMHiX9lSw https://m.youtube.com/watch?v=dxwjPuHIV7I https://vimeo.com/201482507 https://www.youtube.com/watch?v=ZSixqL0iyHw |
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6th Aug 2017 8:44am |
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| Beery Member Since: 16 Nov 2014 Location: NSW Posts: 36
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Likewise
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6th Aug 2017 8:51am |
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| pannawonica Member Since: 21 Nov 2010 Location: Clackline Western Australia Posts: 568
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82'C thermostat only effective on temperature, no difference on fuel consumption! I would look elsewhere for the answer. I did not reference in this instance 130km/h for high temperature, 110km/h is more than enough! when towing. I have noticed for a fact that at lower ambient temperatures in the early morning this is not a problem, what does that point too? Reference Aulro regarding the upgraded Ali sport upgraded radiator, I have no doubt it's a good product and does come up too it's claimed specification. However that been said, it doesn't always cut it out here.
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6th Aug 2017 10:12am |
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| ericvv Member Since: 02 Jun 2011 Location: Near the Jet d'Eau Posts: 5816
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Interesting. Had to go on the Allisport website to find out that indeed there exist upgraded cooling system radiators for all Defender engines. Cannot remember ever having seen that topic discussed here, contrary to uprated intercoolers which are discussed frequently. An idea for future reliability improvement maybe. Thanks for highlighting these upgraded radiators.
Eric You never actually own a Defender. You merely look after it for the next generation. http://youtu.be/yVRlSsJwD0o https://youtu.be/vmPr3oTHndg https://www.youtube.com/watch?v=_GtzTT9Pdl0 https://www.youtube.com/watch?v=ABqKPz28e6A https://www.youtube.com/watch?v=rLZ49Jce_n0 https://www.youtube.com/watch?v=XvAsz_ilQYU https://www.youtube.com/watch?v=K8tMHiX9lSw https://m.youtube.com/watch?v=dxwjPuHIV7I https://vimeo.com/201482507 https://www.youtube.com/watch?v=ZSixqL0iyHw |
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6th Aug 2017 10:30am |
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