 | Home > Puma (Tdci) > Temperature gauge |
 
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| Wild Card 90 Member Since: 03 Dec 2014 Location: Gerlingen Posts: 1060   
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What does our the temperature gauge on our TCDi’s actually tell us?
As the subject has come up recently a couple of times, I took some shots on the way home the other day, to put a number to the various positions of the needle on the scale. Mines a 2012 2.2 with about 55 t miles on the clock. The weather was (finally) a mild eight degrees above zero . I’m on back roads driving in moderate traffic. 38 degrees, needle hasn’t moved  Click image to enlarge 43 degrees, and the needle has climbed Click image to enlarge 51 degrees, and it is on the lower mark Click image to enlarge At 60 degrees it is a quarter up Click image to enlarge At 71 degrees it is nearing halfway. The motor isn’t fully warmed up. Click image to enlarge 82 degrees is as far as I got on the gentle 20 minute journey. The motor is near it’s proper working temperature and the needle is just below the mid mark. Click image to enlarge Hope this is of some interest. Will be good to do the same on a hot summer’s day to see how little the needle moves when the motor temperature gets up to 110 degrees under load. Stephen 1998 Tdi 90 SW, 2008 Td4 90 SW, 2012 2.2 90 SW, 2" raised Trailmaster/Terrafirma Heavy Track Raids, 255 MTs, Recaro CSs, anorak, wellingtons |
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6th Mar 2018 3:05pm |
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| Tdi4 Member Since: 24 Oct 2014 Location: Houten Posts: 513  
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After several temperature issues I'am convinced it is purely installed for esthetical reasons. I think it isn't even connected to any temperature sensor on the car.
 At the end of the design they just had a hole left 
It just goes up after a few minutes to about halfway and then it stays there. Even if the coolant temp is 115 degrees C it won't move at all. But the car will go into limp mode (with of course no errors). Therefore I always use my icarsoft (same as scanguage) to check. a defender from 1984 pretending to be a puma with a touch of Range Rover |
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6th Mar 2018 3:15pm |
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| ian series 1 Member Since: 17 Nov 2014 Location: south Posts: 3127  
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Your 3rd photo reading just the same by the looks of it...
Click image to enlarge 80" 80" 86" 88" 90" Wanted, Forward Control Anything considered. |
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6th Mar 2018 4:25pm |
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| zsd-puma Member Since: 09 Aug 2016 Location: Kent Posts: 2720 
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Many modern cars don't even come with a temperature gauge. But those that do all they've ever told you is "cold", "normal" and "too hot". There's no real accuracy to them beyond that.
Around 75-90 degrees is normal operating temperature on most cars, which will put the needle somewhere in the middle. Anything below that is cold and much above it is too hot. On a Defender the thermostat opens at 88 degrees and cools the engine down. If it doesn't then the viscous coupling engages and the fan works hard to cool it further. On most modern cars the electric fan kicks in and does the same job. |
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6th Mar 2018 7:35pm |
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| Wild Card 90 Member Since: 03 Dec 2014 Location: Gerlingen Posts: 1060
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Thanks Ian, it would be interesting to get feedback from other TDCi owners to see if in fact the temperature is consistent.
We have already established that there is something written into the software that makes it stick at around the mid position until the temperature is already critical, and it is too late to react, but i do believe the low to mid needle positions can be relied on. 1998 Tdi 90 SW, 2008 Td4 90 SW, 2012 2.2 90 SW, 2" raised Trailmaster/Terrafirma Heavy Track Raids, 255 MTs, Recaro CSs, anorak, wellingtons |
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6th Mar 2018 8:27pm |
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| ian series 1 Member Since: 17 Nov 2014 Location: south Posts: 3127
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Slight OT^^^
Who’s alloy dial rings have you got in your instrument cluster?  80" 80" 86" 88" 90"
Wanted, Forward Control Anything considered. |
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6th Mar 2018 8:39pm |
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| Tdi4 Member Since: 24 Oct 2014 Location: Houten Posts: 513
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No you really can’t rely on the gauge!
My car went many times in limp mode. And the gauge was in the middle. But on the icarsoft i found temps over 110 degrees celcius. So don’t rely on the gauge. It’s realy realy unreliable. a defender from 1984 pretending to be a puma with a touch of Range Rover |
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6th Mar 2018 8:56pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20480
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Slightly OT, but I noticed when I changed my coolant that my temp gauge stayed just below middle afterwards.
Previously around half way. I can only but assume the mix wasn't that good before, and some watered down coolant was used.  (not by me).
It's been just below middle ever since the same as th pics here, and mines a 2.4 so it seems they run both about the same roughly 88.C although I only have the gauge to go by. No Guts, No Glory. 🇬🇧🏴🏴🏴🇮🇪🇺🇸⛽️🛢️⚙️🧰💪 |
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6th Mar 2018 9:33pm |
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| Wild Card 90 Member Since: 03 Dec 2014 Location: Gerlingen Posts: 1060
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The subject of going into limp mode has been covered elsewhere, but seems to be one of the very few issues that was improved on the 2.2. My 2,4 would occasionally give up, mid summer on an incline, with 3.5 tons on the hook. The 2.2 hasn´t.
I think showing pictures of what the needle does (subtle) as the temp climbs from 82 degrees up to 110 degrees (rare on mine) will be interesting. @Ian In a weak moment last year I ordered the dial and air vent bezels from Croytec. Wonderful quality, easy to fit. Well worthwhile. Long since forgotten how expensive they were. Your properly integrated Ultragauge looks brilliant. Very envious! 1998 Tdi 90 SW, 2008 Td4 90 SW, 2012 2.2 90 SW, 2" raised Trailmaster/Terrafirma Heavy Track Raids, 255 MTs, Recaro CSs, anorak, wellingtons |
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7th Mar 2018 6:51am |
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