Member Since: 05 Sep 2014
Location: Newquay
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What is the TDV6 running temperature?
As per the title really. I used my trusty IID BT tool plot and record several live values on my drive home yesterday. The primary reason was to check fuel delivery pressure and boost pressure. In addition I recorded, measured air flow, inlet air temperature, boosted air temperature, throttle position and coolant temperature. The latter is something of interest as all other parameters appear ok. The coolant temperature didn't climb to where I would have expected for a 10 mile drive. It climbed to a maximum of 73° C. While not particularly cold, I would have thought that it should be closer to 90° C.
Is what I read on the live values correct or is the engine being over cooled?
Thanks for any information on this.Freelander SE 2005 Auto.
D3 TDV6. Gone.
7th May 2015 9:49 am
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
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Generally mine sits at ~85c.
7th May 2015 9:52 am
Robbie
Member Since: 05 Feb 2006
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A 10 mile drive is not that long so your temp looks about right for a cool but not cold day. The TDV6 is quite a cool running engine, hence the FBH to give it a chance in the winter.
If you run it longer and graph it you should see the thermostat kick-in. If not the thermostat may be leaking.
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IIRC, I'd say mine sits fractionally lower than that - more like high 70s/80 than 85. Current: Discovery 3 06MY (55 reg) HSE Auto Zambezi Silver Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
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7th May 2015 9:58 am
Disco_Mikey
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Member Since: 05 Sep 2014
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Robbie wrote:
A 10 mile drive is not that long so your temp looks about right for a cool but not cold day. The TDV6 is quite a cool running engine, hence the FBH to give it a chance in the winter.
If you run it longer and graph it you should see the thermostat kick-in. If not the thermostat may be leaking.
I'll try a longer run over the weekend. The current log shows the temperature slowly rise up to 73° at 550 seconds. The temperature then dips to a low of 70° at 720 seconds, which I assumed was the stat opening. However there is a one mile down hill section at around this time, this might account for the drop off in temp. After 780 seconds the temperature started to climb again to 73° at which point I was home so stopped the log.
Thankfully the other fueling, boost logs look OK. I do love this IID BT tool. It's a very versatile bit of kit. The placement of the OBD2 port isn't ideal for driving with it plugged in, but that's not the tools fault.Freelander SE 2005 Auto.
D3 TDV6. Gone.
7th May 2015 1:01 pm
Robbie
Member Since: 05 Feb 2006
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There are some daft rules about diagnostic port placement, but it could be better. The IID is reasonably helpful by being small. You should try driving with a diagnostic system that still needs cables!Land Rover - Turning Drivers into Mechanics Since 1948
Can the IID BT tool log oil pressure & temperature ?
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7th May 2015 2:22 pm
DSL Keeper of the wheelie bin
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Oil temp deffo, not sure about pressure.
7th May 2015 2:24 pm
Robbie
Member Since: 05 Feb 2006
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There is no oil pressure measurement on the vehicle, only a pressure switch.
Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 05 Sep 2014
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Robbie wrote:
There are some daft rules about diagnostic port placement, but it could be better. The IID is reasonably helpful by being small. You should try driving with a diagnostic system that still needs cables!
Just thought I'd dig up this thread. I've been thinking about whats normal operating temps for the D3 and finally got around to having a search for if its been previously discussed.
My D3 runs around the 90deg mark under normal conditions. In the last couple of days I had my camper in tow and we also had a couple of hot days - 35deg+ on the dash thermometer. Coolant temps hang around 100deg - as low as 97deg with low load and pushing up to 105 if I let the auto do its own thing - if I take control of the auto then I can keep the temps below 102. Engine oil temps around 116deg which pushed up to 120deg under higher loads.
15th Oct 2016 11:07 pm
defector
Member Since: 23 Feb 2009
Location: Greater Manchester
Posts: 1471
My D3 was running cool and the fuel economy has not been what i expect given the driving style. I had my suspicions as to why. Rarely gets to halfway mark and if it did the external ambient temperature was 15 degrees+.
As the temperature has fallen a little in the last few days, it does not reach the halfway mark but when it has been near there i have used my IR thermometer to check the temperature at the coolant outlet at the front of the Vee, and this only shows about 60+ degrees. (As has been mentioned by Robbie elsewhere, the temperature gauge does not operate in a linear fashion to increasing temperature).
Today, to rid myself of one of the secondary suspicions, i installed a new thermostat ( i wish to find the LR designer of this and apply many volts/amps to his genitalia).
after a 20 mile drive including motorway...........yeeeeeesss ...no change
Which leaves me with my primary suspicion - i have removed my EGR coolers and bypassed the hoses.
With experience of BMW's and their EGR coolers, it is quite well known that the EGR has a mini thermostat installed in the cooler system and when this fails, the fuel economy decreases significantly as the thermostat fails in the open position and lets coolant to flow to the radiator. The mini thermostat is a replacement item.
The TDV6 engine has a mini thermostat in each EGR cooler and as i have bypassed mine, there is full coolant flow through this and i presume to the radiator bypassing the large main engine thermostat.
That is why i presume that when travelling downhil with either no or very little throttle, the coolant temperature comes down as there is little or no fuel being burnt but coolant being cooled at the radiator, but starts to increase when on the level or moreso when going uphill.
Now to fathom a system to reinstall the mini thermostat/s without EGR coolers into my bypass hoses
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Allisport Fast Road Intercooler, V8 Brakes, Silicone IC Hoses, EGRs Blanked, Remapped, De-Cat pipe, FBHIC
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