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C230 supercharger replacement
2002 C230 coupe, 95,000 miles
Check engine light came on. Local mechanic told my daughter she needs a new supercharger. I don't have any other details right now. I'll look into it to be sure that this is truly the case. My question is can this be a DIY? I'm pretty good around the garage and if it's just a matter of unbolting and rebolting things I could certainly do it. Thanks, Dan
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2012 E350 Bluetech Last edited by forp; 01-15-2011 at 01:13 PM. |
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MB supercharger failures are extremely rare. What fault codes were found?
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hmmm
Not quite the same, but when the turbo on the wife's Volvo blew a seal and sent oil everywhere, out independent who is a good personal friend told me that it was do-able, but a little finicky to get it just right. Suggested that he do the job rather than I, and I let him go at it. Not cheap.
But as the previous poster noted, I'd want a careful reasonable discussion that convinced ME that the blower was indeed, in fact, and really actually the problem. |
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Thanks for the inputs.
I don't have the codes yet. I'll post them when my daughter brings them over. I won't procede with this repair unless I am certain the supercharger is the culprit. Dan
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2012 E350 Bluetech |
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I talked to the mechanic.
He didn't have the code numbers but the descriptions were: "Secondary air malfunction" and "Secondary air too low". On the estimate is written, "Found supercharger has insufficient performance and is loud". Could be a leaky gasket somewhere? Can I tell anything by pulling the belt and turning the SC pulley by hand? Dan
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2012 E350 Bluetech |
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The supercharger does double-duty on this car, in addition to being used in the standard fashion as a supercharger it is also used as an air pump for the secondary air-injection system. There are a series of diverter-flaps and switchover valves that accomplish this task, a malfunction in any of these devices can cause the codes your mechanic reported.
In addition a weak O2 sensor or a plugged line in the air injection tubing has also been know to trigger this code. I'd like to know a whole lot more about exactly what was done to determine the supercharger is at fault, there are a whole lot of other things that are more likely to cause this code (P0410 I think?) Do a search for 'P0410 + C230' for more info.
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98 Dodge-Cummins pickup (123k) 13 GLK250 (135k) 06 E320CDI (323K) 16 C300 (62K) 82 300GD Gelaendewagen (54K) |
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The previous post says it all.
FWIW, I've never seen a faulty blower cause an air injection malfunction. As far as it being noisy, that's a very subjective issue. Does your guy have experience with these engines? Does he have a similar car in the shop to use for a comparison? The O2 sensor and/or the re-circulation motor are much more likely to cause your problem. The O2 sensor is easy to test. The re-circ motor not quite so simple. If your guy is trying to sell you a supercharger for this problem I'd recommend you get a second opinion just to be safe. |
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Thanks for the comments.
My daughter said the car sounds the same to her and she hasn't noticed any performance changes. I think I'll get the car over to the dealer for a second opinion. However, the mechanic cleared the codes. Should we wait until the CE light is back before going to the dealer? Dan
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2012 E350 Bluetech |
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There's always the option of putting black tape over the Check Engine light.
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-diesel is not just a fuel, its a way of life- '15 GLK250 Bluetec 118k - mine - (OC-123,800) '17 Metris(VITO!) - 37k - wifes (OC-41k) '09 Sprinter 3500 Winnebago View - 62k (OC - 67k) '13 ML350 Bluetec - 95k - dad's (OC-98k) '01 SL500 - 103k(km) - dad's (OC-110,000km) '16 E400 4matic Sedan - 148k - Brothers (OC-155k) |
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Quote:
The more information the dealer has, the easier it will be for them to fix the problem. |
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Good point.
The CE light is back on so we'll be taking it to the dealer soon. Dan
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2012 E350 Bluetech |
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Have a read through this thread
http://ozbenz.net/viewtopic.php?f=52&t=11863 The person in question required a new supercharger for the want of a $ 5.00 spring. |
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Thanks for the link.
What a pain for such a small part. This is my daughter's car and she hasn't noticed any change in power so the spring is probably ok. Dan
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2012 E350 Bluetech |
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Well, $135 later, the dealer said the problem was a shut-off valve.
They gave me the part number and I bought one online for $62. It was very easy to replace. I cleared the code and time will tell if the fix is good. Depending on what happens, I may have to have a little discussion with the original shop that wanted to replace the SC. Dan
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2012 E350 Bluetech |
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Quote:
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TC Current stable: - 2004 Mazda RALLYWANKEL - 2007 Saturn sky redline - 2004 Explorer...under surgery. Past: 135i, GTI, 300E, 300SD, 300SD, Stealth |
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