Hi Win
I gut the CAT long time ago. It's gone!

They were both Behr radiators but were they both from an MB dealer? Someone observed a while back that the core was different between Behr through MB and Behr for retail. I don't recall for which MB model this was. For kicks, check if the original and replacement radiators have the same row and column count.

In retrospect, it would have been interesting to have the radiators side by side, filled with water and simultaneously drained through the lower hose. Which empties more quickly assuming the same internal capacity.

Sixto
87 300D

Hi Sixto, thanks
Too late...unfortunately someone 'stole' the old radiator which was just outside the garage leaning against the wall...you never know in this country.
Sorry all evidence is gone!
From the outside I can tell they were identical. Same thing.

What are your EGT's now?????

__________________
Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership

EGT's didn't change. Not that I can notice.
But this was expected. Coolant temps don't affect the EGTs very much I fear.

Again the question for the community:
What are EGTs on your stock 603 engines when you drive 75/80/90 mph on the flat highway?
I can't possibly imagine why my EGTs should be different.

Martin

Does the SDL not have a cat or something?

__________________
http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

Again my SDL has no cat , no something. I assume there is no restriction in the exhaust.

Can someone tell me what EGTs a stock 603 engine will produce at various highway speeds like 70/80/90 mph?

If my EGTs seem to be high then I'd know relative to what basic ECTs for stock engine.

Please

I saw EGT of about 550*F in an '87 300D going 65 mph on level ground. For reference, idle EGT was about 350*F after a freeway run.

Sixto
87 300D

Ah I missed that. So wierd, 2 cars same year same engine, one required a cat and the other didnt. I wonder what the logic was there.

__________________
http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

You will have a hair pulling time in Oman. Been there those guys are another quality of mad. None can match them

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1995 E300D - The original humming machine (consumed by Flood 2017)
2000 E320 - The evolution (consumed by flood 2017)

Hi Sixto,

I'll check specifically on my 603 for the EGTs at 65mph. But I'd say that my experienced EGTs much higher at this speed.
My guess is around 700 - 800. Of course the temps must be measured as an average..ideally on a horizontal highway. Slight slopes are influencing the EGTs a lot.
Well, then there is a question at what location EGTs were measured in the exhaust...maybe this is influencing the numbers too. Of course the closer you are to the exhaust valve the higher the temps . On my engine the sensor is maybe 1" in the exhaust manifold on cylinder 1 behind cylinder head. I guess the tip of the probe is sticking into the head very close to the exhaust valve.

Idle EGTs at 350 - 400 F are normal for me too.

I'll attach a couple pictures of probe and gauge under my dash.
Martin

Attached Thumbnails

       

Dear Winmut, again I had a cat in the downpipe as it should be. It was clogged and I decided to take the catalyst out. I cut the thing open, took the ceramic element out and welded the box back together.....no cat any more.

I want to find out why people think that my EGTs are high (I also think so...)
First step would be to know what EGTs a stock engine will produce...before I come to the wrong conclusions.

Martin