M271 Rough Start with AC on
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Junior Member
Joined: Apr 2012
Posts: 22
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From: Williamsburg, VA
2005 C230 Kompressor
M271 Rough Start with AC on
When I start my 2005 C230k SS (Automatic Trans.), and immediately turn the air on, it sounds real rough, almost like an egg beater sound. But when I turn it on with no AC until it warms up, it sounds fine. Also if I bring the AC all the way to "6" it sounds really bad. Can anyone tell me what the problem might be?
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Joined: Jun 2011
Posts: 264
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From: Lumberton, TX
2009 ML350, 2007 GL450, 1963 GMC, BMW 325i
Mine does the same thing.
Read some threads that suggested the idler, and tensioner pulley's. So I replaced them, and it still does it.
A/C works great, just sounds like crap on start up.
Mine also will go into a limp type mode sometimes with the A/C on. My screen doesn't say "limp mode", and it doesn't throw any codes, but it cuts the power in half.
Read some threads that suggested the idler, and tensioner pulley's. So I replaced them, and it still does it.
A/C works great, just sounds like crap on start up.
Mine also will go into a limp type mode sometimes with the A/C on. My screen doesn't say "limp mode", and it doesn't throw any codes, but it cuts the power in half.
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Joined: Jun 2011
Posts: 264
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From: Lumberton, TX
2009 ML350, 2007 GL450, 1963 GMC, BMW 325i
Normal??
Normal that these problems would eventually happen?
Or normal because everyone's car, even yours makes those noises. We just have odd cars since our "normal" problems only just recently started?
Glyn, I've always respected your input, and advise... But this has me puzzled.
Normal that these problems would eventually happen?
Or normal because everyone's car, even yours makes those noises. We just have odd cars since our "normal" problems only just recently started?
Glyn, I've always respected your input, and advise... But this has me puzzled.
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C180 Kompressor Wagon
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Joined: Jun 2008
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Normal??
Normal that these problems would eventually happen?
Or normal because everyone's car, even yours makes those noises. We just have odd cars since our "normal" problems only just recently started?
Glyn, I've always respected your input, and advise... But this has me puzzled.
Normal that these problems would eventually happen?
Or normal because everyone's car, even yours makes those noises. We just have odd cars since our "normal" problems only just recently started?
Glyn, I've always respected your input, and advise... But this has me puzzled.
The 4 cyl engines are a little clattery until warm & clearances normalise & all the emissions stuff shuts down. Even the V6's are noisier.
Unusual noise is best checked by removing the Poly V belt & checking accessories if the noise disappears.
Check idlers, tensioners, Alternator/bearing, HVAC compressor itself.
Good luck.
Last edited by Glyn M Ruck; Sep 2, 2012 at 06:10 PM.
Thread Starter
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Joined: Apr 2012
Posts: 22
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From: Williamsburg, VA
2005 C230 Kompressor
Sorry - a bit too hasty in my reply. A certain amount of rough running until warm & stable is typical with A/C load on the 4 cylinder engines. Even Matt's car does this - so does Phil's. See previous threads in this regard. As mileage rises the throttle bodies & actuators wear & make this worse as do soft mountings. On Phil's car the throttle body was replaced & it improved things but some of it is the nature of the isolation mountings.
The 4 cyl engines are a little clattery until warm & clearances normalise & all the emissions stuff shuts down. Even the V6's are noisier.
Unusual noise is best checked by removing the Poly V belt & checking accessories if the noise disappears.
Check idlers, tensioners, Alternator/bearing, HVAC compressor itself.
Good luck.
The 4 cyl engines are a little clattery until warm & clearances normalise & all the emissions stuff shuts down. Even the V6's are noisier.
Unusual noise is best checked by removing the Poly V belt & checking accessories if the noise disappears.
Check idlers, tensioners, Alternator/bearing, HVAC compressor itself.
Good luck.
Last edited by Glyn M Ruck; Sep 2, 2012 at 11:05 PM.
Thanks torake, big help!
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Joined: Jun 2008
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
There is some evidence on this forum that a sprag bearing failure on the alternator on an M271 can take out the HVAC Compressor drive. I have not personally seen a case of this.
Thread Starter
Junior Member
Joined: Apr 2012
Posts: 22
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From: Williamsburg, VA
2005 C230 Kompressor
Sorry about my lack of knowledge! Or if you have a sound clip, that would be even better! thanks!
Senior Member
Joined: Jun 2011
Posts: 264
Likes: 2
From: Lumberton, TX
2009 ML350, 2007 GL450, 1963 GMC, BMW 325i
Understood, thanks Glyn.
Chase, do a search for timing chain rattle. Should answer your questions. It's a fairly loud rattle, or clanking sound for just a second or two after start up, until the oil pressure builds.
Chase, do a search for timing chain rattle. Should answer your questions. It's a fairly loud rattle, or clanking sound for just a second or two after start up, until the oil pressure builds.
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2019 G70 6MT & 2022 Ford Maverick XL
What the hell does that even mean ^?
Anyway, yes the M271 is especially noisy when cold A/C on or not. I wouldn't say mine runs roughly, it's just noisy. Then again, all my engine mounts are relatively new.
Anyway, yes the M271 is especially noisy when cold A/C on or not. I wouldn't say mine runs roughly, it's just noisy. Then again, all my engine mounts are relatively new.
Thread Starter
Junior Member
Joined: Apr 2012
Posts: 22
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From: Williamsburg, VA
2005 C230 Kompressor
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W203 c180 2007
plz help
i replace 2 hoses under air filter and cleand TB in\out side AND cleand MAF
no error codes
plz help
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From: Wichita, KS
2002 C230 Coupe
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Joined: Sep 2012
Posts: 15
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2005 C230 KOMPRESSOR SPORT
I did new serpantine belt, idler and tensioner pulley to get rid of chirping noise which ended up being the alternator. Got new alternator installed. This resulted in extreme amount of vibrations with the AC on, forget turning on the AUTO climate button function as it felt like a caged animal was under the hood. I was told to have the AC compressor inspected, the pulley and operation was fine.
-This made me think it was something else.
This really started to bother me as this engine is only a 1.8 litre 4, why the heck should it run so poorly. All maintenance of the engine (oil, filters, plugs are current) No check engine lights. So I moved on and replaced fuel filter which made engine run a bit smoother but not a marked improvement. AC vibrations still resulted. I also noticed if I turn on my rear defroster for the window or if I pull up on the window switches when the windows are already raised the engine would get a slight electrical interuption and shutter very very minimally however it was present anytime I did this.
-As a last effort before I figured I would stop worrying about it I replaced my ignition coils (All four) and the car runs and responds very smoothly. Extremely minimized the vibrations with the AC on. I plan on having my engine transmission mounts replaced in the next month and expect the car to run very well by that point.
-This made me think it was something else.
This really started to bother me as this engine is only a 1.8 litre 4, why the heck should it run so poorly. All maintenance of the engine (oil, filters, plugs are current) No check engine lights. So I moved on and replaced fuel filter which made engine run a bit smoother but not a marked improvement. AC vibrations still resulted. I also noticed if I turn on my rear defroster for the window or if I pull up on the window switches when the windows are already raised the engine would get a slight electrical interuption and shutter very very minimally however it was present anytime I did this.
-As a last effort before I figured I would stop worrying about it I replaced my ignition coils (All four) and the car runs and responds very smoothly. Extremely minimized the vibrations with the AC on. I plan on having my engine transmission mounts replaced in the next month and expect the car to run very well by that point.
