Yeah, ROLLGUY here sells the EGR delete kits. It's funny because I bought one from someone else on eBay years ago for my 300SD, and then my roommate bought one from ROLLGUY for this car. The one from ROLLGUY got lost in a box somewhere when we moved and we couldn't find it, so we robbed the one from my 300SD because I had just replaced the manifolds with non-EGR ones. I remember the one that ROLLGUY sold had that nice yellow cad plating that matches the rest of the plated parts on the vehicle. One day it will turn up.

As for the ALDA cap, we got it from this guy: https://www.ebay.com/usr/dynomatt27-7?_trksid=p2047675.l2559

https://www.ebay.com/itm/mercedes-300-om617-injection-pump-alda-delete-/174043166450?nma=true&si=qOf9oBwuxTVMn9zfA44YOcMZpJM%253D&orig_cvip=true&nordt=true&rt=nc&_trksid=p2047675.l2557

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DON'T MESS WITH MY MERCEDES!


1967 W110 Universal Wagon, Euro, Turbo Diesel, Tail Fins, 4 Speed Manual Column Shift, A/C
1980 W116 300SD Turbo Diesel, DB479 Walnut Brown, Sunroof, Highly Optioned, 350,000+ Miles

The two valve covers we have didn't look very good. The one that came with the head was in the worst condition cosmetically.


So, I decided to sand and polish it. I used 400, 600, 800, 1000, 1500, and 2000 grit sandpaper that comes in little strips in the packets at the auto parts stores, and soapy water. It took about 10 hours. Then I polished it with Blue Magic Metal Polish Cream. I let the polish set on the surface for a couple hours to clean off the oxidation from the pits and depressions. It's not perfect, but it does look better than new. This is not a job for the lazy!


Here is the polished valve cover installed with a nice oil filler cap.


I installed the air cleaner, support bracket, and pipe.

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Stop paying for animal enslavement, cruelty, and slaughter. Save your health and the planet. Go vegan! I did 18 years ago. https://challenge22.com/

DON'T MESS WITH MY MERCEDES!


1967 W110 Universal Wagon, Euro, Turbo Diesel, Tail Fins, 4 Speed Manual Column Shift, A/C
1980 W116 300SD Turbo Diesel, DB479 Walnut Brown, Sunroof, Highly Optioned, 350,000+ Miles

It seems that most of the internal breather valves which are hidden away inside the baffling which is riveted in place under the valve covers of the OM603 engines are failing by now. Mercedes must not have intended for the engines to last this long. Their solution is to buy a new valve cover (603-010-05-30) at $615.00.


When this check valve fails, the turbocharger will start to suck in oil from the engine and coat the intake manifold with oil. I wonder how many people have rebuilt their turbocharger thinking it was the culprit. See this link for more information: https://www.coolcatcorp.com/Mercedes%20valve%20cover/Mercedes%20Valve%20Cover%20Breather.html

Apparently you can tell if the internal check valve has failed by putting a hose up to the little hole on the right rear of the valve cover and draw a vacuum--if oil comes out, the diaphragm has failed. On both the valve covers I have here, the holes are wet with oil. I just did a head replacement on this car with the one from the Diseasel after it met its demise. It came with a valve cover, and before the head swap, the previous valve cover on the car on which I am working was allowing oil to get sucked into the turbo as well.

I noticed Diseasel300 had installed a PCV valve from a 1999-2004 Volkswagen Golf or Jetta diesel to replace the failed diaphragm inside the valve cover: The "Diseasel" - '86 300SDL

I decided to get a Volkswagen PCV valve. I was reading this thread here: 0M 603.971 Cold Starts, right up Then: and clicked on the link and purchased a similar PCV valve. Then I realized that the valve I purchased (part number 06A129101D) is a different one than what Diseasel300 used (028129101E) and is actually for a gasoline-powered 1.8 liter Audi and Volkswagen. Oops.

Sadly, while the one I ordered seemed that it would be even more ideal than the one Diseasel300 uses, the bottom tube was too thick to fit into the grommet. It was nearly the thickness of the hole in the valve cover. Darn it! So, my roommate ordered the correct one and the grommet that goes with it since it keeps the valve from resting on the valve cover.

Here is the 028129101E part number valve with the matching 028103500 part number grommet.


The pin on the side should be snapped off so it doesn't interfere. Diseasel300 also inserted a barbed brass fitting on which he shaved off the threads and inserted with black sealant so a smaller hose would fit on it.


This is how the grommet fits on the valve cover--tall side up!


Here is how the PCV valve looks on the valve cover. Unfortunately, it points in the wrong direction and can't be rotated without obscuring the oil filler cap. I tried to think of elegant ways to route the hose so it would be secure and wouldn't interfere with the belt tensioner access or removal of the fan. I even considered using 5/8" aluminum A/C tubing and bending it to shape and securing it to the front of the head using spacers and clamps.

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Stop paying for animal enslavement, cruelty, and slaughter. Save your health and the planet. Go vegan! I did 18 years ago. https://challenge22.com/

DON'T MESS WITH MY MERCEDES!


1967 W110 Universal Wagon, Euro, Turbo Diesel, Tail Fins, 4 Speed Manual Column Shift, A/C
1980 W116 300SD Turbo Diesel, DB479 Walnut Brown, Sunroof, Highly Optioned, 350,000+ Miles

But then I had a breakthrough! I figured out a way that I could use this 06A129101D part number breather valve after all.



Because the Volkswagen grommet is so tall, a large portion of it is on the outside of the valve cover, allowing it to expand without the valve cover restricting it. I found that if I cut off the flare at the bottom of the valve, the grommet would stretch enough for it to be inserted.

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Stop paying for animal enslavement, cruelty, and slaughter. Save your health and the planet. Go vegan! I did 18 years ago. https://challenge22.com/

DON'T MESS WITH MY MERCEDES!


1967 W110 Universal Wagon, Euro, Turbo Diesel, Tail Fins, 4 Speed Manual Column Shift, A/C
1980 W116 300SD Turbo Diesel, DB479 Walnut Brown, Sunroof, Highly Optioned, 350,000+ Miles

I had an old breather tube on which the insulation had deteriorated, and a fairly new one.


I cut off the part that fits into the valve cover on the old breather tube. The tube is wider on this end due to the plastic fitting which was inserted, which also adds strength and makes the outer diameter of the tube closer to the fitting on the breather valve.


Then the insulation from the newer breather tube was slid over to connect the tube to the valve--which has the grommet attached to it. Due to adding the breather valve on the end, the tube was now too long, so I cut off about 1 1/2" from the bottom.


Then I slid on the grommet and lower piece of insulation.


I am very happy with the new breather arrangement. It looks original and does the job without getting in the way of other parts.

__________________
Stop paying for animal enslavement, cruelty, and slaughter. Save your health and the planet. Go vegan! I did 18 years ago. https://challenge22.com/

DON'T MESS WITH MY MERCEDES!


1967 W110 Universal Wagon, Euro, Turbo Diesel, Tail Fins, 4 Speed Manual Column Shift, A/C
1980 W116 300SD Turbo Diesel, DB479 Walnut Brown, Sunroof, Highly Optioned, 350,000+ Miles

The 350SDL is alive again! It idles smoothly and seems to have decent power. I don't notice any smoke unless I have it floored (and then it will roll coal quite well).

Right now there is oxalic acid in the cooling system in order to get rid of the rest of the rust in the block. Then it will get washing soda and a good rinse before the Zerex G-05 coolant goes back in it.

I had to rip off the hood pad. It was saturated with oil and sagging down. No glue would hold it and even after my idea of holding it up by wedging in popsicle sticks, the center still sagged down too low. It kept getting the engine compartment dirty and scuffing up parts. I couldn't deal with it anymore. Hopefully the paint on the hood doesn't fry.




Here is how the engine looked when he got the car.

__________________
Stop paying for animal enslavement, cruelty, and slaughter. Save your health and the planet. Go vegan! I did 18 years ago. https://challenge22.com/

DON'T MESS WITH MY MERCEDES!


1967 W110 Universal Wagon, Euro, Turbo Diesel, Tail Fins, 4 Speed Manual Column Shift, A/C
1980 W116 300SD Turbo Diesel, DB479 Walnut Brown, Sunroof, Highly Optioned, 350,000+ Miles