300Tdi - high EGT

[travelrover]

Hi team

I'm sure this subject has been discussed previously but I am unable to find anything relevant here.

I am concerned that EGT's are too high on hills whether they are long slow or short and steep and this is without a heavy load and only two people. So I am looking for ideas to reduce this.

Typically I keep boost to between 10-12psi and revs around 2-2200 speed around 45 -50kph and third gear but still get EGT readings rapidly rising to 650+ and you can smell the heat.

I have owned a few 300Tdi's over the years and while not having EGT sensor/gauge and rev-counters I don't believe they ever got this hot based on lack of the sense of a very hot exhaust. I had a 130 (ex Calvert Expedition vehicle - tucker truck) in the mid 90's which I towed a double horse float and all the gear for a number of years and never had an issue.

The current 300Tdi is stock standard though I understand that there would be benefit to fitting a large intercooler and perhaps a larger turbo. Maybe it just needs a clean out??

Does anyone have real world experience they can share here?

Cheers - Simon

[TonyC]

High EGTs are from a rich air fuel mixture.

If the fueling is stock and the timing is right, then it's not getting enough air.

Check the air filter, delaminated intercooler hoses or leaks in the hoses or intercooler.

At 2,000 RPM and full throttle you should have full boost, which is 15 PSI, were is the boost being measured?

Tony

[AK83]

Whist mine is a D1, ... still same thing.
Apart form all usual areas to check, may also keep in mind that a blocked up muffler can also 'not help' EGTs.
My centre muffler was blocked up(being original, and thus 20 years old). I got the exhaust changed from the down pipe back.
Ummed and ahhed about doing muffler deletes, etc, but in the end thought to try just a free flowing centre muffler and nothing down back.
Instantly EGTs came down considerably, less so on cruising on the flat, but more so on long hills. 50-100 C.
But I hated the drone from the lack of a rear, and about a week later got a rear muffler of some type fitted. Noise better, but 50C(at a minimum) more on my 'test hill'.

In between that, I adjusted fuelling to suit keeping EGT to a 700 max threshold in worst case situations(but I back off earlier than that anyhow). So once rear muffler came on board, had to de-fuel again, and lose a bit of poke from it.

[Tins]

Yes. Breathing is vital. And breathing is a whole system, from airbox to tailpipe. As exhaust systems no longer tend to rust out, especially on diesels, they are often overlooked and thus neglected.