EGT Differential - is it a problem?

[Ghost-Who-Walks]

I have a 2010 3.0L SE, which has done ~220,000kms. It is awesome, runs beautifully... Just had another service with no problems to report. [bigsmile]

We were driving back to Perth from Shark Bay last week, with my daughter at the wheel racking up some country kms... I plugged my IIDTool (BT) in to have a play, as I don't often get the chance to see what it can do, what info is available etc etc.
So, I had fun looking at all the different info that was available from "Live Values" menu option. Especially comparing bank 1 & 2 sensor info (temps, pressures etc), which I assume represent both halves of the V6... Lots of cool info there!

One thing I noticed was that the EGT's from bank 1 & 2 were significantly different. I'd go so far as to say that the bank 1 gauge may not even be working!
Bank 2 temp was around 380C, and fluctuated constantly with load.
Bank 1 temp was on 120C and didn't move at all. There are 2 other EGT sensors for bank 1, but they don't appear to be connected (displays NA)...
Screenshot attached...

Should I be concerned? What would this affect on the car?

As mentioned, I have no problems with the car at all. Performance is great. No (confirmed) faults registered at any stage.

Over to the brains trust!!

Thanks (in anticipation!).

Rob

142207

[cjc_td5]

3.0l Diesel?
If I recall correctly the turbos are sequential and Banks 1 & 2 are NOT either side of the engine block. You get differing EGTs as one turbo is doing most of the work at normal loads. Give it a poke and the other EGTs will rise as the other turbo comes into play?

[Ghost-Who-Walks]

3.0l Diesel?
If I recall correctly the turbos are sequential and Banks 1 & 2 are NOT either side of the engine block. You get differing EGTs as one turbo is doing most of the work at normal loads. Give it a poke and the other EGTs will rise as the other turbo comes into play?

Ahhh, makes sense...
I'll give it a go and see what happens.

My thinking on bank 1 & 2 being either side of the engine was because (my recollection) is the EGR info was referenced as bank 1 & 2 (eg EGR valve % open bank 1, bank 2)...
Although can't be sure now. I'll have to plug it back in and have another play!

Thanks Chris.

Rob

[Milton477]

On my 3.0l with 2 turbos, one of the banks No.2 sensor does all of the work until the revs exceed 2800 at which point No.2 of the other bank wakes up.

[Ghost-Who-Walks]

So, the Bank 1 EGT doesn't move when not under load (idling in the driveway!).

When under load (driving):
Bank 1 temp starts to rise when above about 2500rpm, and definitely starts 'heating up' after 3000rpm.
Even when dropping revs to ~2200rpm, it was still reading higher than the original 120C, which could be just residual heat...

All good. Interesting to know.

Thanks for the help! :BigThumb: