good for you! down with the electronic man inside my turbo, throwing soot into the intake!

that part looks pretty simple, im sure you or someone else could fabricate one, or just close up all of the extra holes you have. i seem to remember someone on this forum doing that.

__________________
1991 300 D 2.5 Turbo, 220k
also in the family:
1981 240 D 185k
1991 350 SD 185k
2006 S 500
2005 SLK 350

Dave,

How did you conceal from the EDS that the vacuum transducers (and feedback)
were no longer present?
I've always been under the (what now may be mistaken) impression that
disconnecting and removing all that electro-vacuum transducer mess in
front of the coolant recovery tank(on the passenger side wheelhouse)
WOULD cause the EDS to wreak havoc (in retaliation) upon the idle control
and other sensing functions [I.E. rack position sensor info ,Etc.)?

Very neat installation(surgically clean engine).

When you eventually inter-cool that engine the need for that crossover pipe
will go away.

That is another option... fabricating a custom tube, longer than the ones shown below, to connect to the shorter USA crossover pipe. But I suspect this might be expensive, to make something that looks factory. I don't want a Rube Goldberg pipe duct-taped in there, lol. The 603-098-13-04 pipe in the photo below will fit right into the longer Euro crossover pipe. Sourcing is the main problem. Maybe someone across the pond could help out and send us a dozen or so!

Attached Thumbnails

 

__________________
Check out my website photos, documents, and movies!

CI,

My guess is that the idle speed control is totally separate from the boost and emissions controls, so the idle function (ELR) still works fine. The rack sensor's only mission in life is to provide info to the computer, which is used to determine when to trigger the EGR and flapper valve. So the rack sensor (L7) also becomes irrelevant. The EDS could be ditched entirely if it wasn't for the idle/ELR control!

BTW, the engine isn't normally this clean. I had to pull the head off to replace a blown gasket, and while I was in there, I cleaned up a little bit. Photos of the head gasket job are here. There's some fun stories behind that as well, but I haven't yet had time to start a new thread about the gasket project.

Thanks!

Great pictorial!

In there you make reference to a newer version head (not having the slotted
oil passages)

How many version/upgrades of the 602.962 heads?

Why don't you adjust the internal idle speed setting so you can rid the engine of computers entirely?

Wait, "the longer euro crossover pipe"? so you need a new charge-air pipe AND a new cross-over pipe? i didnt realize the euro had a different one, i bet that's pretty expensive. if the $300 quote is for just the euro crossover pipe, i bet the connector pipe is about another $200. I think it would probably be really cheap to have made if it were straight, but since its cone shaped i have no idea.

i know i saw pictures on this forum where someone had just had plates made for the egr and other holes. i know it wouldnt look as good, but being able to put this stuff back on easily might be an advantage.

good luck and let us know how you do!

__________________
1991 300 D 2.5 Turbo, 220k
also in the family:
1981 240 D 185k
1991 350 SD 185k
2006 S 500
2005 SLK 350

I think the computer also serves a similar purpose as the rack dampener on the 617 engines. I don't think my OM601 (190D 2.2) had the idle speed control, and its return to idle was noticeably inferior to my OM602 and OM603 with the ELR.

__________________
John Robbins
'05 E320 CDI - 240k
'87 300TD - 318k

'Answering my own question (Makes me feel like a real adult!)

The Cyrillic website lists 4 different versions:
6020102020
6020103620
6020104720
6020108120

BUT none of those are GSXR's 6020160801

or mine (even older) XXXXXX0601

AND there is a note *414 "THE OLD PART MUST NO LONGER BE INSTALLED",
Which refers to XXXXXX2020 or XXXXXX3620 (or Both)

So, the answer is still on the table (Who Knows).

Forced Induction,

I think the idle/ELR function of the EDS is tied in with the speed sensor on
the back of the compressor and with the help of the dreaded KLIMA relay
assists in air conditioning functions?

There appears to only be four different OM602 turbo cylinder heads, where the OM603 had six different heads. The latest 603 head has an enclosed, internal front oil passage. I am assuming the newest 602 head has the same improvement, but I'm not 100% sure about that. The "#08" head on my 602 is equivalent to the "#17" head on a 603. If this gasket ever fails, next time I'm putting on an all-metal OM605.96x gasket instead.

We could. But the computer does a nice job of the idle speed control (keeps steady speed as AC compressor kicks on/off, and when the trans is put in gear) and there's no down side to having the idle speed control working. There wouldn't be any significant advantage to removing it, AFAICT. The important part is disabling the emissions junk to keep soot out of the intake, and removing several miles of potentially leaky vacuum tubing.

Excellent point, John. I think you are correct.

Correct - there are two different crossover pipes. We need the longer crossover pipe ($300 list), and the longer (black) cone-shaped pipe too (no US price shown, probably under $30 though). I can get the main pipe for $236 (wholesale), but that's still a lot of spaghetti.


Yup, I've got the blockoff plates also. But since the 602.962 engine has the flapper valve, I'd prefer to delete everything instead of leaving it in place. But for now it will remain, until I can find a way to get that crossover pipe cheaper...

Attached Thumbnails

 

Ah, that's all part of the fun. The spare part number in the EPC is not the same as the *casting* number on the head. But with some help from the FSM, I've deduced that the #08 is equivalent to the #17 OM603, and the older #06 is likely the same as the #14 (or rare #15) OM603. This older #06 head is more likely to have issues with cracking, same as the #14/#15 603 heads.



Yet another good point! I'm not sure if the EDS is tied into the KLIMA function or not. If so, then we definitely wouldn't want to remove the EDS system. I don't know if the KLIMA receives the engine speed signal directly from the tach sensor, or via the EDS.

The EDS idle speed control does other good things like keeping the engine at a higher idle after a cold start, in addition to regulating the idle speed as the A/C cycles.

Hey Dave, you need those transducers anymore?

__________________
Dale

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1990 300D 2.5 Turbo -155k
2000 E430 - 103k
2014 Jeep Grand Cherokee Ecodiesel 4x4 - 11k
2014 VW Passat TDI SE - 7k Bro's Diesel
2006 E320 CDI - 128k Pop's Benz

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