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OM648 Intake Manifold removal Proces (Swirl flap delete & EGR delete and Intercooler Upgrade)

76K views 79 replies 26 participants last post by  DieselBound  
#1 · (Edited)
Hello everyone, I have a 2006 e320 cdi ( om648 motor ) and had a problem with my swirl flaps putting my car into limp mode, Ive decided to take apart the intake manifold and swap it out with a intake manifold that came without them!
Im planning of removing egr, deleting turbo silencer in the process.
Right now I'm waiting on the intake manifold from Europe that has no swirl flaps ( the part number for that is
A6130900737 )
Im thinking of deleting the egr pipe as is a very big restriction and fills the cars intake with sot.
I will be making a video how to remove the intake manifold properly so you wont have to suffer as much as I did.

This is the intake manifold which came with the swirl flaps, as you can see the arm which is made out of plastic broke off and is a very bad design!
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You have to be very careful when you are removing external torx bolts ( e10 or e12 socket I think ) of the intake manifold because once you strip the bolts you have very small chance of getting them out.

First step is to remove Fuel filter and remove all the hoses connected with the fuel filter!
I recommend leaving the fuel line that goes on the bottom of intake manifold and gets connected with fuel lines going to the back of the car! ( watch the fuel lines in the intake manifold photo ! leave them dont take the bolt out! ) just disconnect the hoses! You will have much easier time rather than removing it!


I recommend the second step is to remove the egr pipe coming from the engine to the the intake manifold as it will make removing the bolts much easier as it will give you more access.
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I spent 3 days trying to take out a bolt on the bottom of egr hole coming from the engine as I stripped the bolt and since it was in such a bad spot the only thing I could do is break the intake manifold on the bolts since I would be getting a different one. If you encounter a stripped bolt try using extractor for the external torx e10, e12 or e14 but when u make a hole punch please make a punch right in the middle and be 10000% sure it is in the middle. I tried doing it with a extractor but i didnt punch it in the middle and had a bad time!
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Once you take take out the 14 bolts of the intake manifold, you move on the bottom of the car and reach for some other bolts.

First, you take out the bolt holding the intake manifold from the engine mount.
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Secondly, you remove the bolt where the intake manifold is connected with the pipe coming from intercooler,
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Third, you remove 3 bolts from egr connector pipe ( I dont know how to call it lol ). As you can see the egr pipe is quite restrictive and filles the intake with bunch of sot.
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Now you move on top on taking the connectors and fuel pipes that block the intake manifold from coming off!
I will post updates since there can only be had 10 pictures only on a post!
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#6 ·
Before you try to improve MB design, consider that the ca 50 engineers did the design for a reason. It might have some side effects, like gunk accumulation, but flaps help in engine performance.
For this year Liqui Moly makes intake cleaner, who in easy job should eliminate the problem where is started, so some might try to go this way.
https://www.napaonline.com will find you
Part # : AIC LM20208 what is the cleaner , although NAPA is screwing around with its availability. Call your local NAPA and ask them to order it.
Raise the hell if they don't.
 
#13 ·
Update on the progress I made on the car, I decided to buy a intercooler which is 27.5 inches long 8.5 inches high and 3 inch thick! It fits perfect! You actually have 1-2 inches of clearance so for the height I think you can fit a 10 inch high intercooler no problem!
For the couplers I’ve gone and bought the high quality couplers from Vibrant Performance so those suckers wont blow out! Vibrant Performance Reinforced Silicone Elbows 2782
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#46 ·
Update on the progress I made on the car, I decided to buy a intercooler which is 27.5 inches long 8.5 inches high and 3 inch thick! It fits perfect! You actually have 1-2 inches of clearance so for the height I think you can fit a 10 inch high intercooler no problem!
For the couplers I’ve gone and bought the high quality couplers from Vibrant Performance so those suckers wont blow out! Vibrant Performance Reinforced Silicone Elbows 2782 View attachment 2635169 View attachment 2635170
Hi, what intercooler brand is this?
Regards, Mke
 
#16 ·
Thank you for documenting all of this. There are likely several other OM648 owners out there who will really appreciate this, going forward.
 
owns 2003 Mercedes-Benz S600
#20 · (Edited)
Yes, the car will need a ecu tune for egr delete since I want it to pass inspection. I’m gonna get the car tuned from marcin, he will be tuning my car for more power. He said Intercooler upgrade, Swirl flap delete, egr delete, turbo silencer delete will upgrade the power from 201 to 270-280 which is awesome 😎.
 
#21 ·
Who is Marcin? I'm not familiar with him, though it sounds like he's a professional modder.
 
owns 2003 Mercedes-Benz S600
#23 ·
Took out the silencer from passenger side where it’s mounted to the turbo.


Taking the bolts out is pretty easy!(it probably took me 10-15 minutes) But trying to take out the turbo silencer from the tight engine bay from the bottom took me 30-40 minutes. The only way I was able to take it out was from the gap close to the radiator and close to the alternator.
I guess there is a lot of restriction because of the stupid thing that’s inside. Broke a little bit of the plastic inside for better airflow. I tried taking the 4 bolts holding the thing together and maybe try to install the silencer while is inside the engine bay but since the rubber gasket needs to be installed from the inside part that wouldn’t work so I had to put it back in one piece. Then I had to put the silencer back the same way which also took me about 20 minutes.
Overall I would’ve changed the engine mounts faster than taking out silencer 😞
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#34 ·
Took out the silencer from passenger side where it’s mounted to the turbo.


Taking the bolts out is pretty easy!(it probably took me 10-15 minutes) But trying to take out the turbo silencer from the tight engine bay from the bottom took me 30-40 minutes. The only way I was able to take it out was from the gap close to the radiator and close to the alternator.
I guess there is a lot of restriction because of the stupid thing that’s inside. Broke a little bit of the plastic inside for better airflow. I tried taking the 4 bolts holding the thing together and maybe try to install the silencer while is inside the engine bay but since the rubber gasket needs to be installed from the inside part that wouldn’t work so I had to put it back in one piece. Then I had to put the silencer back the same way which also took me about 20 minutes.
Overall I would’ve changed the engine mounts faster than taking out silencer 😞
View attachment 2636440 View attachment 2636446 View attachment 2636447 View attachment 2636448
So what happened to the silencer? Did you install a different one or the same?
 
#30 ·
For me it was easier to take the hoses out and leave the metal pipe connected with the manifold! Then take it out after I took out the intake manifold. Some of the hoses look pretty old and dry so i may change some hoses “while I was there 🤣”.
I miss my car and actually can’t wait for the part. I bought the manifold for 60$ (Which is way too cheap compared to the mercedes 1200$ quote ) but had to pay shipping +70$ 😞and it still isn’t coming fast
 
#32 ·
Keep up the good work, and thanks again for posting this adventure!
 
owns 2003 Mercedes-Benz S600
#33 ·
I had to weld the ear back because it was broken and resurfaced the intake manifold for no leaks! Big big important lesson is to drain coolant before you take out the bolts of the intake manifold! My car keeps smoking for a long time because it had went on the egr port ( which is connected to exhaust) when I took it off
 
#37 ·
Dude the turbo sounds like a dodge cummins, the whistling can be heard a mile away 😍😍. Well I jumped from stock to this so I don’t know how big of a difference a tune without intercooler is hehe. Car is way more powerful! I have some boost problems now but I have to fix a boost leak now! Boost leak is coming from this rubber gasket because I didn’t tighten it enough, it will be fixed no problem l but dude the turbo now is so much louder