SL55/63/65/R230 AMG: Quick Poll: supercharger chirp
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2005 SL55 AMG
Quick Poll: supercharger chirp
I have read numerous posts that the AMG super charger "chirp" is entirely normal and results from the SC clutch engaging; the dealer told me that too. How many of my fellow AMGers also have this chirp?
Purchased a 2005 SL55 AMG certified used in July - love the car.
Purchased a 2005 SL55 AMG certified used in July - love the car.
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Eurocharged 2004 E500, Eurocharged ECU/TCU 2005 SL600, 2010 Caddy SwaggerWagon
I don't now about "normal" but it seems a lot have it. I think there's even a TSB to address the issue, so it can't really be "normal"
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have an 04 - HAD the chirp - everyone says it's normal - didn't think anything of it - car went in for warranty work and had them put in a new SC clutch pack. . . now I have no more chirp and the engagement is WAAAAYYY smoother. After this experience I personally believe the chirp is cause by the SC clutch slipping and even though it may be normal (as in not detrimental) it is NOT optimal... just my .02
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2004 S55 (SOLD, miss it every day), 2009 GL550
I have read that there is a TSB about the chirp, and the TSB says *not* to replace it because it's normal. However, there is a fix, at least for my 2004 S55: install a 2006 clutch pack. The cars do not leave the factory chirping, and only develop it over time as the material wears, therefore it is *not* normal in my book.
It *can* be fixed, and it should be fixed. A $112,000 car should not be chirping like a worn fan belt on an old Ford.
It *can* be fixed, and it should be fixed. A $112,000 car should not be chirping like a worn fan belt on an old Ford.
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2005 SL55 AMG
Thank you and I agree with you. When I brought the car into the dealer, I actually described the noise as just that. I am going to try and get the 2006 clutch pack under warranty. If that fails, what was the total cost to install your on 04?
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2004 S55 (SOLD, miss it every day), 2009 GL550
I may try to get the fix through my fidelity EW and an indy mechanic, but so far haven't bothered.
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My '03 SL55 has been doing it since the day I bought it. I keep a small bottle of graphitic lubricant in the car and give it a little squirt every month or two. This keeps the chirp quiet and doesn't appear to affect the engagement either.
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a Rivera...via a Custom 24, Strat and Les Paul
I was not able to get the dealer to do the fix under warranty, so I still have the chirp. If I recall correctly, a new clutch pak is $1,000+, but I don't know if that's just parts, parts and independent mechanic install, or dealer install.
I may try to get the fix through my fidelity EW and an indy mechanic, but so far haven't bothered.
I may try to get the fix through my fidelity EW and an indy mechanic, but so far haven't bothered.
#10
My '05 had the chirp when I bought it and one of the members here (aluthman) suggested "Squirting a bit of graphitic lubricant into the supercharger clutch will take care of the chirp for a few months at a time.". I took the car into a local shop here and his suggestion took care of it (although we took care of a lot of other things like air filter change, changed some worn out belt, etc. that ran the bill to $580).
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SL55 AMG
I think the cirp can be eliminated by replacing the bearing there on the SC...next time I'm in at Euro Germantown, I'll ask my guy there if a TSB is in place for this...
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2004 S55 (SOLD, miss it every day), 2009 GL550
That they didn't know about the fix speaks volumes...
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I was not able to get the dealer to do the fix under warranty, so I still have the chirp. If I recall correctly, a new clutch pak is $1,000+, but I don't know if that's just parts, parts and independent mechanic install, or dealer install.
I may try to get the fix through my fidelity EW and an indy mechanic, but so far haven't bothered.
I may try to get the fix through my fidelity EW and an indy mechanic, but so far haven't bothered.
IMHO a chirping SC clutch is not normal. It is however the result of normal clutch wear and is not reason enough to replace the clutch. I could be wrong, but believe the chirp can contribute to SC clutch bearing failure over time and suggest anyone with the chirp inspect the bearing occasionally. Especially if you are running a larger pulley.
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I personally think this bearing should be looked at every 30K miles and replaced as part of upkeep, if the dealer can do it as TSB/Warranty that's the best though...if it doesn't chirp no biggie so long as one can still enjoy optimal performance out of the car...
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2003 W211 E55, 2003 W220 S600
ok chirp noise is generated by the s/c belt slipping. The older design clutch packs have a very harsh and immediate engagement which causes the belt on the s/c pulley to slip causing the sound. The newer design clutch packs have to gentle engagement phase which does not cause the belt to slip.
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04 Sl55, 09 civic, 09 mitsu spyder(wifes), 97 Lx 450
my 04 with 23k mi has no chirp yet, but once it does it will give me a good reason to upgrade the pulley and get an ecu
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RHD C200 Sport Coupe, RHD SLK-55, LHD SLK-350
Sunir, dig up GI09.50-P-004105 - you'll love it.
Cause
Frictional vibrations at compressor clutch
Occasionally complaints have been received regarding squealing noises in engines equipped with compressor. This noise can occur depending on speed and load when the compressor is switched on.
Remedy
It is not allowed to replace the compressor when these complaints occur.
This engine-specific noise is state of the art. At best, replacement of these parts leads to a temporary solution of the problem and customer dissatisfaction will increase.
Sorry, had to post that one - gotta love the Germans.
GI09.50-P-037126 is probably more accurate, calls for replacing the belt pulley due to bad bearings. Didn't see a DSB/TSB associated with either...
Cause
Frictional vibrations at compressor clutch
Occasionally complaints have been received regarding squealing noises in engines equipped with compressor. This noise can occur depending on speed and load when the compressor is switched on.
Remedy
It is not allowed to replace the compressor when these complaints occur.
This engine-specific noise is state of the art. At best, replacement of these parts leads to a temporary solution of the problem and customer dissatisfaction will increase.
Sorry, had to post that one - gotta love the Germans.
GI09.50-P-037126 is probably more accurate, calls for replacing the belt pulley due to bad bearings. Didn't see a DSB/TSB associated with either...
Last edited by UK-C200; 09-13-2010 at 09:14 PM.
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SL55 AMG
Sunir, dig up GI09.50-P-004105 - you'll love it.
Cause
Frictional vibrations at compressor clutch
Occasionally complaints have been received regarding squealing noises in engines equipped with compressor. This noise can occur depending on speed and load when the compressor is switched on.
Remedy
It is not allowed to replace the compressor when these complaints occur.
This engine-specific noise is state of the art. At best, replacement of these parts leads to a temporary solution of the problem and customer dissatisfaction will increase.
Sorry, had to post that one - gotta love the Germans.
GI09.50-P-037126 is probably more accurate, calls for replacing the belt pulley due to bad bearings. Didn't see a DSB/TSB associated with either...
Cause
Frictional vibrations at compressor clutch
Occasionally complaints have been received regarding squealing noises in engines equipped with compressor. This noise can occur depending on speed and load when the compressor is switched on.
Remedy
It is not allowed to replace the compressor when these complaints occur.
This engine-specific noise is state of the art. At best, replacement of these parts leads to a temporary solution of the problem and customer dissatisfaction will increase.
Sorry, had to post that one - gotta love the Germans.
GI09.50-P-037126 is probably more accurate, calls for replacing the belt pulley due to bad bearings. Didn't see a DSB/TSB associated with either...
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Shardul...when were these newer designed clutch packs issued - how do we inform someone about which parts to get or have these parts simply replaced the old one in the MB system? Are there any conflicting Part numbers?? thanks
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