Thread: Defender 300tdi EGT location

Not having much experience myself, but I would have thought that 680 Post Turbo is quite high. Considering that there can be upwards of 100+ degrees drop between PRE and POST readings and I've read that 720 degrees PRE is MAX...... but as I said, I'm not that experienced myself..... it's only from what I have researched....

Thanks but where I've mounted egt is quite close to the egr blanking plate so i don't know wether that much distance would make that much of a difference

These couple of Pics were supplied to me from a Seller of EGT's. These Figures are actually from a Disco Tdi and that's the car he owns....

1st one is a comparsion between Temps of No.1 Cylinder and the Junction where all exhaust gases meet - PRE TURBO



This one is a comparsion between PRE-TURBO (Red) and POST TURBO (Yellow) and the TEMP Differences between the 2 (Black). Blue is the BOOST.



From this photo u can see where he installed his Probe PRE Turbo:


Probe installed POST TURBO:


From the 1st graph, there is little difference in the TEMPS PRE-TURBO....
From the 2nd graph, the MAX Temp Difference is a HIGH as 186 degrees and LOW as 50 degrees (@ idle I presume)

So, the biggest difference is at the HIGHEST LOAD as can be seen from the graph..... So, if u believe the above info and allow for the TEMP difference, your EGTs I would class in the HIGH bracket (possibly TOO High ???), but it also comes down to how long they are in that range for.....


Thought this might be useful to someone......

Originally Posted by robbiestokes

Thanks but where I've mounted egt is quite close to the egr blanking plate so i don't know wether that much distance would make that much of a difference

Thats great info
So his orignal temp is on the egr blanking plate is that correct ??
Im going to hopefully soon get a new sender and install there as well to make sure

Do you know any one who has the correct probe bent for that position in the egr plate ??

You can bend the probe.
The sensor is at the very tip.
Best would to be welding the bung at 45 degress to the plate.
Then no bendage of the probe would be required.

Originally Posted by jboot51

You can bend the probe.
The sensor is at the very tip.
Best would to be welding the bung at 45 degress to the plate.
Then no bendage of the probe would be required.

I also thought about welding a piece on (but not bending as I'm not sure that is a safe thing to do Pre-Turbo) but after speaking to Ian from Thermoguard, he said that would be little advantage in doing that so I just went with what he supplied. The Probe only goes in somewhere between 20>30mm... As long as the tip is not touching the metal, he said it will work fine.....

You can checkout his website: ThermoGuard Instruments. It has lots of get info and he's very helpful if u have any questions.... I bought his Thermocouple Probe & EGR blanking Plate but used the Auberin's Digital Gauge as this has Alarm settings, etc.

I'm a little confused why you didn't install it in the blanking plate and be done with it? It's the perfect place and the most relevant readings... (My understanding anyway).

Edit: maybe realise now. Shape of probe....
Still, I would change to pre. As the drop across the turbo changes you can never really tell what is a safe number unless the probe is pre turbo.