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DIY - M271 $12 hose replacement

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Old 09-13-2016, 01:25 AM
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I call bull****. REplace $12 hose, sure. Remove supercharger to replace the other two hoses? There's literaly zero pictures/videos of anyone ever doing this.
Old 09-13-2016, 01:52 AM
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Old 09-13-2016, 04:07 AM
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Originally Posted by DOTC
I tried this job a couple of weekends ago and its really not that bad. The ONLY thing that kept me from finishing was the damn clamp on the boot. I bought the tool I needed, but someone angled mine toward the firewall at an impossible angle for that tool. I'm going to have to get it to a shop and have them move the clamp to a spot where I can actually get to it. Just from looking, my hose was decent, but I could tell it was an older gen part number because of what the material was made out of. That and I found what looked like an oil leak on top of the "motor front" valve that's sandwiched by the motor and super charger. Really hoping it isn't the head gasket. :-(
Where are you located? There should be a recall for this. (yes I know you posted 5 months ago)
Old 09-13-2016, 01:39 PM
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Sure, but this guy died shortly thereafter. Seriously though, it's nice to see the orientation of the hoses, but I really need a video of taking out the supercharger after removing the intake manifold.
Old 09-13-2016, 01:48 PM
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This one shows the removal of the manifold, after which the SC and SC damper are just bolted onto the side of the engine block:

Old 09-13-2016, 02:35 PM
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Originally Posted by jkowtko
This one shows the removal of the manifold, after which the SC and SC damper are just bolted onto the side of the engine block:

Intake Manifold Replacement Mercedes Benz C230 2000-2007 - YouTube
I've watched this video. So it's as easy as unbolting 3 or so screws and lifting it out?
Old 09-13-2016, 02:42 PM
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Looks like it to me.

The compressor is an external accessory, just like the PS pump or AC compressor. So other than the hose and sensor connections, and the serpentine belt, it's just mounting screws.

However I would suggest that you pick up some new gaskets to go between the compressor, muffler and feed tube. They are pretty inexpensive, and since I've never done this before I don't know if they would be reusable.

After I do my brakes this fall, I will be doing a water pump/coolant hoses/gaskets changeout, and then I think the kompressor will be next. At that time I plan to buy the breather hose kit and replace all those parts as well.

Fyi when you have the compressor off the car you should replace the snout oil. It's pretty inexpensive, and due to the location of the fill/drain plug you can't get the full 110ml into the snout in it's position while mounted on the car. When the compressor is off the car the oil change is trivial.
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Old 09-14-2016, 01:20 PM
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Originally Posted by slammer111
Where are you located? There should be a recall for this. (yes I know you posted 5 months ago)
In the Spring, TX area. Yeah MB told me the car had all the recall items done, but in a previous post it was mentioned that this part has been redone several times. my newer part has a more plastic/rubber look to it. The part in mine looks like a straight rubber that's browned a little bit. Still haven't gotten it to the shop yet to get the clamp moved..been a little busy. That and like the previous guys post.. I'm not looking forward to removing to supercharger, but hey.. it cant be as bad as a intake removal on a e46 BMW.
Old 09-14-2016, 01:23 PM
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Originally Posted by jkowtko
Looks like it to me.

The compressor is an external accessory, just like the PS pump or AC compressor. So other than the hose and sensor connections, and the serpentine belt, it's just mounting screws.

However I would suggest that you pick up some new gaskets to go between the compressor, muffler and feed tube. They are pretty inexpensive, and since I've never done this before I don't know if they would be reusable.

After I do my brakes this fall, I will be doing a water pump/coolant hoses/gaskets changeout, and then I think the kompressor will be next. At that time I plan to buy the breather hose kit and replace all those parts as well.

Fyi when you have the compressor off the car you should replace the snout oil. It's pretty inexpensive, and due to the location of the fill/drain plug you can't get the full 110ml into the snout in it's position while mounted on the car. When the compressor is off the car the oil change is trivial.
The only thing I would worry about is your last paragraph there.. the bolt to change the oil is supposed to be a major pain to get off (tight). If the SC is off the car it maybe hard to loosen that bolt properly. Loosen on the car and then remove the SC sounds like the way to go. Drain..etc.
Old 10-07-2016, 05:47 PM
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awesome diy fix!

Dude thank you very much for posting this, I saved lots of money by doing this myself and it totally worked!
Old 10-07-2016, 06:11 PM
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Originally Posted by w203c230k
Dude thank you very much for posting this, I saved lots of money by doing this myself and it totally worked!
Did you do the complete super charger removal?
Old 10-07-2016, 06:34 PM
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Originally Posted by jkowtko
This one shows the removal of the manifold, after which the SC and SC damper are just bolted onto the side of the engine block:

Intake Manifold Replacement Mercedes Benz C230 2000-2007 - YouTube
I just now got around to watching this video.. anyone else watching this please purge your gas line and pull the pump fuse for it. The valve is front top of the fuel rail.

Also, if I saw my mechanic ripping apart my car like this I would be pissed.. I'm not a mechanic, but if you sit there and tug on parts like that, something is going to break. Learned my lesson working on my 2001 325i.
Old 10-07-2016, 07:12 PM
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Originally Posted by DOTC
The only thing I would worry about is your last paragraph there.. the bolt to change the oil is supposed to be a major pain to get off (tight). If the SC is off the car it maybe hard to loosen that bolt properly. Loosen on the car and then remove the SC sounds like the way to go. Drain..etc.
For me it was a Torx T25 or T30 ... I used one of my Torx screwdrivers and it came right off ... it was hand tight only. There is a rubber gasket molded into the screw which makes it very slow to turn either way, but after 3/4 turn it loosens up
Old 10-07-2016, 07:22 PM
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Originally Posted by jkowtko
For me it was a Torx T25 or T30 ... I used one of my Torx screwdrivers and it came right off ... it was hand tight only. There is a rubber gasket molded into the screw which makes it very slow to turn either way, but after 3/4 turn it loosens up
Good to know.. Did the rubber gasket get damaged when it came off? i imagine a replacement bolt is fairly cheap.
Old 10-07-2016, 07:30 PM
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Originally Posted by DOTC
Good to know.. Did the rubber gasket get damaged when it came off? i imagine a replacement bolt is fairly cheap.
No it didn't get damaged ... but I live in the San Francisco area so the weather is very moderate here. i honestly don't know how easy it would be to get one of these bolts. It's an Eaton M45/M65 compressor, but the snouts and fill bolts appear to be different over different years.
Old 10-08-2016, 10:26 AM
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Originally Posted by DOTC
Did you do the ete super charger removal?
actually no, all I removed was the air filter box!
Old 12-05-2017, 11:34 PM
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Any updates on campaign number 2008020002?
Old 02-13-2020, 07:30 PM
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Originally Posted by drb930
Any updates on campaign number 2008020002?
the Benz dealer tells me my sons 2005 MB C230k is not covered under this campaign number.......
Old 05-05-2020, 12:22 PM
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edit

Last edited by Starshiprider; 05-05-2020 at 03:57 PM.
Old 08-16-2020, 09:10 AM
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**updated DIY instructions for $12 and crankcase breather hoses**

For those looking to change out the $12 hose and the rest of the hose pieces and check valve and gaskets from the crankcase ventilation kit, here is an updated link. I started getting a mystery crankcase fume smell that wafted into the cabin when the car was stopped with the engine running. Turns out the check valve had disintegrated and was basically venting into the engine bay. In other words, I had to DIY the entire recall again.

Crankcase breather system ($12 hose and 2 lower hoses) and check valve replacement

Last edited by slammer111; 08-06-2022 at 05:40 AM.
Old 08-31-2020, 12:40 AM
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Regarding this $12 hose... HOW in the world have you all gotten that far clip/clamp off? I cannot get it for the life of me. I am using a long flat head screwdriver. Should I use a thin and long phillips (+) head screwdriver? ....an angled end screwdriver? ...hose clamp remover tool?

This clamp at the far end is stuck... and so am I!

Thank you for the help! Hoping the C will run great after I swap this hose as I have already done cam magnets, pigtails, cleaned connectors, cleaned TB, and cleaned MAF... this little clamp is the last thing standing between me and the smoothest this car has run since I have purchased it! Any and all help will be so appreciated.
Old 08-31-2020, 12:54 AM
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Originally Posted by Chase230
Regarding this $12 hose... HOW in the world have you all gotten that far clip/clamp off? I cannot get it for the life of me. I am using a long flat head screwdriver. Should I use a thin and long phillips (+) head screwdriver? ....an angled end screwdriver? ...hose clamp remover tool?

This clamp at the far end is stuck... and so am I!

Thank you for the help! Hoping the C will run great after I swap this hose as I have already done cam magnets, pigtails, cleaned connectors, cleaned TB, and cleaned MAF... this little clamp is the last thing standing between me and the smoothest this car has run since I have purchased it! Any and all help will be so appreciated.
It's a PITA to change with the supercharger still mounted in place, but it can be done.
You need some long curved needle-nosed pliers if I remember.
AS far as all the stuff you cleaned and pigtails, ect. you messed up there... could have taken it to the dealer and had it all replaced under warranty for FREE!!!
Old 09-01-2020, 06:25 AM
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The Clic-R hose clamps can be undone with a screwdriver (use a wider one and twist), and reclipped with a pair of end cutting pliers. Watch the video to understand how they work. Of course, there is no substitute for the proper tool.


The bottom 2 hoses can be reached with a pair of curved needle nose pliers, but they are stuck onto the nipples on the engine so tightly that it's almost impossible to remove and reinstall without the supercharger being removed first. I tried this personally and was unable to do so. There's a reason these 2 hoses don't require hose clamps.
Old 09-06-2020, 10:30 AM
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Originally Posted by drb930
It's a PITA to change with the supercharger still mounted in place, but it can be done.
You need some long curved needle-nosed pliers if I remember.
AS far as all the stuff you cleaned and pigtails, ect. you messed up there... could have taken it to the dealer and had it all replaced under warranty for FREE!!!
No - I have checked and my '05 is not one under the warranty. Cleaning connectors was the easy part. Thanks for the input on the tool to use!

Originally Posted by slammer111
The Clic-R hose clamps can be undone with a screwdriver (use a wider one and twist), and reclipped with a pair of end cutting pliers. Watch the video to understand how they work. Of course, there is no substitute for the proper tool.

https://www.youtube.com/watch?v=fWNG0qXCWJQ

The bottom 2 hoses can be reached with a pair of curved needle nose pliers, but they are stuck onto the nipples on the engine so tightly that it's almost impossible to remove and reinstall without the supercharger being removed first. I tried this personally and was unable to do so. There's a reason these 2 hoses don't require hose clamps.
I used a screw on clamp but it gave me fits keeping it at an angle where i could tighten it, without it moving back more once i put the pressure of the screw driver on there. eeing the tool, that hose clamp that was there would have been easier. IF I was able to get the tool all the way back here! I appreciate the DIY, but I must say you are either much more skilled than I am, or much more optimistic! This DIY was a true PITA... I hope it fixes my idle problem. I must say that my hose looked totally fine. I hope I didnt replace them for nothing! re-connecting everything today. fingers crossed!
Old 09-06-2020, 11:29 AM
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Originally Posted by Chase230
No - I have checked and my '05 is not one under the warranty. Cleaning connectors was the easy part. Thanks for the input on the tool to use
Not here to argue with you but -
You are correct, your car is long out of warranty.
There is a factory campaign on the leaking cam sensors that the dealer has to honor no matter how old the car is if the campaign has not been completed on that VIN.
There is a sticky thread on here called M271 drivers go to the dealer for free.
Check it out.
About 2 years ago with 100K miles on my car the dealer put a new ECU, Electronic throttle, harness, injectors, oil sensor, pigtails and a bunch of other stuff for free and gave me a free MB loner for the week that they had the car.


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