In dire need of help
Thread Starter
Newbie
Joined: May 2014
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09 gl 320
In dire need of help
09GL320
Did the oil cooler job today.
Cleaned manifold and made sure flappers are freely moving
Replaced servo motor
After reassembly..the drive home was without any boost
No check engine light until a few restarts...havent been able to scan yet
All charge pipes are tight and secure
Does the servo motor need to be programmed? Could this cause no boost?
Any ideas?
Did the oil cooler job today.
Cleaned manifold and made sure flappers are freely moving
Replaced servo motor
After reassembly..the drive home was without any boost
No check engine light until a few restarts...havent been able to scan yet
All charge pipes are tight and secure
Does the servo motor need to be programmed? Could this cause no boost?
Any ideas?
Thread Starter
Newbie
Joined: May 2014
Posts: 11
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09 gl 320
I did it myself. I have been on the collision side of things for 20 years and that usually brings mechanical work to some degree. It wasn't that bad of a job. Lots of parts to take off. At first glance you kinda say to yourself wtf but as long as you're organized in the disassembly process it will go smoothly. Some things are rather time consuming. I ordered everything I needed up front from my dealer using part numbers from a kit sold on ebay. It was pretty spot on. 2 bolts holding the turbo to the rear bracket were the worst. And the servo motor was tedious as well. I am thinking this may be where my problem is. 12 hour job all together. .fair amount of that time was cleaning
Senior Member
Joined: Jul 2010
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2010 GL550, 2013 C63
I dont even have a GL yet, but wanted to get a sense of what the job involves. I'll check out youtube for reference. Also, if I ever wind up getting a GL and doing the job, i'll hit you up! Thanks.
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09 gl 320
Ok..Monday morning and this vehicle is driving as it should. I just let it sit all day yesterday out of shear aggravation. The code stored is P0471..exhaust pressure. Could this come from the egr solenoid maybe getting wet from parts cleaning solution? I will be doing an extensive DIY write up for anyone wishing to do their own and save a couple bucks
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E55, GLS450, GL63, GLE350
Ok..Monday morning and this vehicle is driving as it should. I just let it sit all day yesterday out of shear aggravation. The code stored is P0471..exhaust pressure. Could this come from the egr solenoid maybe getting wet from parts cleaning solution? I will be doing an extensive DIY write up for anyone wishing to do their own and save a couple bucks
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MBWorld Fanatic!
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you soaked something in something. it evaporated and all is good.
if your lack of boost was persistent i would venture to say you forgot a hose or a gasket somewhere. in that case get a mechanics stethoscope and a helper to blip rapidly and lightly the throttle in park and you assume the "praying" position on the top of the engine and listen for hisses
if your lack of boost was persistent i would venture to say you forgot a hose or a gasket somewhere. in that case get a mechanics stethoscope and a helper to blip rapidly and lightly the throttle in park and you assume the "praying" position on the top of the engine and listen for hisses
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check the inlet and outlet hoses where they connect to the intercooler. make sure you have your gaskets in there and all is right
in other words - recheck your ic replacement job. you have forgotten something - check vacuum hoses around turbo boost lever... make sure all operates as expected.
ideally - you should read the code freeze data with das and see what is out of bounds.
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09 gl 320
I will recheck the charge pipes. Don't recall seeing vacuum lines or a boost lever. .could you be a little more specific please..and just for clarification. .you are thinking a boost leak is causing this symptom thus going into a limp mode of sorts. Thanks
Junior Member
Joined: Sep 2012
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From: Maryland
2008 GL 320 CDI
Anyone have any ideas on what “exhaust pressure to high” code could mean? I had my fuel pump and sensor replaced, and the now check engine light is on. Car hesitates when you need to accelerate really fast onto a ramp.
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09 gl 320
First of all..we would need a dtc to obtain a starting point.
Secondly. .thanks to all that commented on this post...wound up being a back pressure sensor that sits vertically to the right side of the turbo if you are looking from the front. This sensor got wet with parts cleaner solution and apparently they are not very forgiving. Although the part number described it as a fuel pressure senor even though it goes in the manifold and doesn't read any fuel pressure per se.
Stay tuned for a full DIY writeup of an oil cooler job
Thanks
Secondly. .thanks to all that commented on this post...wound up being a back pressure sensor that sits vertically to the right side of the turbo if you are looking from the front. This sensor got wet with parts cleaner solution and apparently they are not very forgiving. Although the part number described it as a fuel pressure senor even though it goes in the manifold and doesn't read any fuel pressure per se.
Stay tuned for a full DIY writeup of an oil cooler job
Thanks
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09 gl 320
The newest seals are purple in color and seem to be a little bit more stiff of course I'm comparing it to seals that were on there for 90,000 miles they are a little bit thicker and for $120 my cost i didn't want to go back in and have to replace the oil cooler afterwards so I did it all at the same time I had read people's stories about having the seals replaced only to have to go back in at a later date and replace the cooler... very labor intensive
