CT is lucking out DMV emissions has been dead for at least 2 years, and the private company that was hired to set up the new program is so incompitant they lost the contract after millions of tax dollars and their money was already spent converting to the new system. So as far as I know CT has no emissions at all and thier is nothing coming in the near future. The DMV wouldn't know an egr from a blower. Besides a nice tank of biodiesel will make me pass with flying colors if emissions ever does come back.

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2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200

I guess then you wont have any trouble getting rid of the EGR as I understand some states a pretty strict with their emissions. I removed mine a couple of months ago but did not notice much change, but also my turbo was none functioning and have only had it working properly the last couple of weeks.

So I gather your "lead foot" isn't going to change? Well in light of the responses I have recieved here on my theory, not much has changed from what we have always known before. If Brian Carlton has it right, and I think he does, and my theory has merit, we may now know that the stage is set, and how it gets set, waiting only for the day the engine overheats!

I'm no longer going to worry about avoiding full boost for fear of cracking my head because it isn't likely to unless it should ever overheat. All anyone can do is make sure their cooling system is in good shape and not wait until something wears out or burst an old hose that should have been replaced long before!

Steve.............

Steve, I convinced him to drive like I do. Allow the SDL to shift just below 2000 rpm's and let all the shi*boxes pass you on the way to the next red light. They are all sitting there picking their noses when you roll up behind them.

But, there is a reason for their behavior: The time at the red light does not count in the overall trip time.

I just took-up on the bowden cable so I can quikly passem at the lights dodging foreign debri from hitting my windshield!

Did you do yours with one of Brians kits? How did it go? I bought them but have not installed yet. I need more time in my life.

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Alan Hamm
'87 300SDL 277K Miles
'89 560 SL 68K Miles

In Maryland, diesels are exempt from emissions

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Alan Hamm
'87 300SDL 277K Miles
'89 560 SL 68K Miles

Well Brian I am kind of back to my old ways I let it shift around 2k now or just above. But no higher than 2,500. My SDL gets full throttle runs a few times a day getting on the highway. I just don't worry about the head, my sooling system is operating perfectly and by next spring will be completly new.

Alan no I didn't get one of Brians kits, although if he has the part the blocks the egr tube I would be interested. I had my own plate made and blocked the egr when I cleaned out the intake manifold in March. After pulling the manifold and seeing all of the crap that was built up. I don't care what the egr does for performance all of the grit and carp beeing passed threw the intake valve's can't be good for them. My car was driven on the highway a lot by the po, so the trubo was always spooling and driving that junk into the engine.

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2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200

Are you guy talking about a kit that was available from one of the members a couple of months ago for something like $40 bucks or so that would cap off and eliminate MB's recall, re-fit, manifold section that replaced the original trap oxidizer?

I wasn't paying attention at that time who here was offering the kit, and I guess it was Brian Carlton.

To take off-line the EGR, I simply plugged off the vacuum supply to the EGR system!

But if I can remember, I think I remember an additional advantage with Brians kit too! Are they still available?

Steve...........

I still have a couple of kits left, Steve, if you want one.

Thanks Brian

I need to refresh my memory, I'll pull up your posts on this kit from a couple of months ago.

On another note, hmmm whitch one? I'm going to enrichen my alda today to take off 2 seconds from the 0 to 60. My first run after freeing up the rusted alda push rod got me I think was 12.9 seconds. Dave says 11 is what to aim for.

Steve........

Dave is likely right with the 11 seconds for the 124. The SDL runs about 11.5.

Back to the theory, this could be another one...
I think one of the main factors is the heat distribution within the head. The start of the ignition comes from the pre-chamber openings. If the flames are not distributed equally, this puts ahuge stress on the head (not as it was designed for), and eventually it will crack. Such as the flames are concentrated through one openning and one side etc.. That is why MrBZ changed the design of the Pre-champer design, and made it straignt and not tilted etc. just to minimise the effect of this on the head. Not very effecient cooling system will participate in accelerating the damage. Having the EGR installed, the build up inside the pre-champers will affect the Pre-champers equal distributuion of flames through opennings. Also the type of fuel (different from eaurope) might have effect on that distribution...I think also pistons can suffer from cracks due similar reasons, in the case of OM603, it is the head that takes the stress.

Could this be another theory!!!
toknow

Another way to attack this thing, does anyone know of a 603 that cracked it's head that they can say was never overheated?

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2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200

Hatterasguy, your question illustrates the problem I have pinning this problem on one factor. Since no one I know of has owned one of these from day 1, we are all in the dark as to past history and can't say for sure how the car was treated. Mine had green coolant in it when I bought it, also had a cracked head. Does that mean the green coolant caused the crack? Without a whole lot of data and absolutely thorough records, we just can't draw any definitive conclusions. Everything is just a theory.

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Keep everything as simple as possible-but no simpler--Albert Einstein

Seems like a chicken or the egg thing to me. Maybe the cracks develop and cause overheating.

Sixto
95 S420
87 300SDL