Dayco No Slack Automatic Belt Tensioner
Designed to maintain constant tension on serpentine belt drives
Serpentine belt drives consist of a single belt that powers most, if not all, of the engine’s accessories.
To maintain the proper tension throughout the drive, an automatic, spring-loaded tensioner is incorporated into the drive system geometry.
Dayco’s Automatic Belt Tensioner features a patented “flat spring” design that’s engineered to provide less operating range variations in tension.
This reduces the risk of premature accessory bearing failure due to high tension when a new belt is installed.
It also lessens the risk of belt squeal and slippage, or poor accessory performance caused by low tension after the belt begins to stretch and wear. A Teflon strip wound within the spring resists abrasion.
The flat spring itself is coated to resist rust.
Other superior design features include a steel locator pin (where the application demands).
A heavy-duty cast aluminium spring case resists cracking and fatigue. The heavy-duty cast aluminium arm offers additional strength and less distortion.
An aluminium retainer ring locks the spring case and arm together, and seals against corrosion.
A steel pivot tube (where the application demands) provides additional strength for critical torque requirements.
A thermoplastic rubber “spring slot plug” keeps out harmful contaminants. The lubricated nylon “pivot tube bushing” and “spring bushing” promote quieter performance.
A rubber “O” ring seals against dust and grime.
The zinc coated mounting bolt resists rust, and is concentric for a more even degree of constant tension.
In order to meet OEM performance standards, Dayco Automatic Tensioners come with either a glass-filled polymer (plastic) or steel pulley, that features a dust cover to protect against contaminants.
Fits the following Make, Model, Series:
Chrysler > Crossfire > Oct 2003 - Jan 2009, 3.2L, V6, 18V, SOHC, MPFI, ZH, 160kW, EngCode: EGXMercedes Benz > C240 > Sep 1997 - Oct 2000, 2.4L, V6, 18V, SOHC, MPFI, W202, EngCode: M112.910
Mercedes Benz > C240 > Nov 2000 - Aug 2005, 2.6L, V6, 18V, SOHC, MPFI, W203, EngCode: M112.912
Mercedes Benz > C280 > Sep 1997 - Oct 2000, 2.8L, 6 cyl, 18V, SOHC, MPFI, W202, EngCode: M112.920
Mercedes Benz > C32 AMG > Nov 2001 - Aug 2004, 3.2L, V6, 18V, SOHC, MPFI, W203, 260kW, EngCode: M112.961
Mercedes Benz > C320 > Nov 2000 - Aug 2005, 3.2L, V6, 18V, SOHC, MPFI, W203, EngCode: M112.946
Mercedes Benz > C320 > Sep 2004 - Aug 2005, 3.2L, V6, 18V, SOHC, MPFI, CL203, EngCode: M112.946
Mercedes Benz > C43 AMG > Apr 1998 - Nov 2000, 4.3L, V8, 24V, SOHC, MPFI, W202, EngCode: M113.944
Mercedes Benz > C55 AMG > 2004 - 2006, 5.4L, V8, 24V, SOHC, MPFI, W203, 270kW, EngCode: M113.990
Mercedes Benz > CL500 > Mar 2000 - Feb 2003, 5.0L, V8, 24V, SOHC, MPFI, W220, EngCode: M113.960
Mercedes Benz > CL500 > Mar 2003 - Mar 2007, 5.0L, V8, 24V, SOHC, MPFI, C215, EngCode: M113.960
Mercedes Benz > CL55 AMG > Jul 2001 - Feb 2003, 5.4L, V8, 24V, DOHC, MPFI, C215, 265kW, EngCode: M113.986
Mercedes Benz > CL55 AMG > Mar 2003 - Mar 2007, 5.4L, V8, 24V, SOHC, SCMPFI, C215, 368kW, EngCode: M113.991 , Supercharged
Mercedes Benz > CLK240 > Nov 2002 - Aug 2005, 2.6L, V6, 18V, SOHC, MPFI, C209,A209, EngCode: M112.912
Mercedes Benz > CLK320 > Oct 1997 - May 2002, 3.2L, V6, 18V, SOHC, MPFI, C208, EngCode: M112.940
Mercedes Benz > CLK320 > Oct 1998 - Dec 1999, 3.2L, V6, 18V, SOHC, MPFI, A208, EngCode: M112.940
Mercedes Benz > CLK320 > Jun 2002 - Aug 2005, 3.2L, V6, 18V, SOHC, MPFI, C209, EngCode: M112.955
Mercedes Benz > CLK430 > Nov 1999 - May 2003, 4.3L, V8, 24V, SOHC, MPFI, C208, EngCode: M113.943
Mercedes Benz > CLK55 AMG > Nov 1999 - Jul 2002, 5.5L, V8, 24V, SOHC, MPFI, W208, 255kW, EngCode: M113.984
Mercedes Benz > CLK55 AMG > Nov 2002 - Aug 2006, 5.5L, V8, 24V, SOHC, MPFI, W209, 270kW, EngCode: M113.987
Mercedes Benz > CLS500 > Jun 2005 - May 2008, 5.0L, V8, 24V, SOHC, MPFI, C219, 225kW, EngCode: M113.967
Mercedes Benz > CLS500 > 2006 - May 2011, 5.5L, V8, 32V, DOHC VVT, MPFI, C219, 285kW, EngCode: M273.960
Mercedes Benz > CLS55 AMG > Jun 2005 - Sep 2006, 5.4L, V8, 24V, SOHC, SCMPFI, C219, EngCode: M113.990
Mercedes Benz > E240 > Jan 1998 - Aug 2002, 2.4L, V6, 18V, SOHC, MPFI, W210, 125kW, EngCode: M112.911
Mercedes Benz > E240 > Jan 2000 - Aug 2002, 2.4L, V6, 18V, SOHC, MPFI, W210, 125kW, EngCode: M112.914
Mercedes Benz > E240 > Aug 2002 - Aug 2005, 2.6L, V6, 18V, SOHC, MPFI, W211, 130kW, EngCode: M112.913
Mercedes Benz > E280 > Sep 1998 - Mar 2001, 2.8L, 6 cyl, 18V, DOHC, MPFI, W210, EngCode: M112.921
Mercedes Benz > E320 > Feb 1996 - Aug 2002, 3.2L, V6, 18V, SOHC, EFI, W210, EngCode: M112.941
Mercedes Benz > E320 > Aug 2002 - Jan 2005, 3.2L, V6, 18V, SOHC, MPFI, W211, EngCode: M112.949
Mercedes Benz > E430 > Jan 1998 - Aug 2002, 4.3L, V8, 24V, SOHC, MPFI, W210, EngCode: M113.940
Mercedes Benz > E500 > Aug 2002 - Sep 2006, 5.0L, V8, 24V, SOHC, MPFI, W211, EngCode: M113.967
Mercedes Benz > E55 AMG > Apr 1998 - Aug 2002, 5.4L, V8, 24V, DOHC, MPFI, W210, 260kW, EngCode: M113.980
Mercedes Benz > E55 AMG > Nov 2002 - Sep 2006, 5.4L, V8, 24V, DOHC, SCMPFI, W211, 350kW, EngCode: M113.990, Supercharged
Mercedes Benz > E55 AMG > Jun 2004 - Sep 2006, 5.4L, V8, 24V, DOHC, SCMPFI, S211, 350kW, EngCode: M113.990, Supercharged
Mercedes Benz > G55 AMG > May 2011 - Feb 2013, 5.4L, V8, 24V, SOHC, SCMPFI, W463, 373kW, EngCode: M113.993, Supercharged
Mercedes Benz > ML320 > Sep 1998 - Apr 2003, 3.2L, V6, 18V, SOHC, MPFI, W163, 160kW, EngCode: M112.942
Mercedes Benz > ML350 > May 2003 - Aug 2005, 3.7L, V6, 24V, DOHC, MPFI, W163, 175kW, EngCode: M112.970
Mercedes Benz > ML430 > Mar 1999 - Oct 2001, 4.3L, V8, 24V, SOHC, MPFI, W163, EngCode: M113.942
Mercedes Benz > ML500 > Nov 2001 - Aug 2005, 5.0L, V8, 24V, SOHC, MPFI, W163, 215kW, EngCode: M113.965
Mercedes Benz > ML500 > Sep 2005 - Jun 2007, 5.0L, V8, 24V, SOHC, MPFI, W164, 225KW, EngCode: M113.964
Mercedes Benz > ML55 AMG > Jan 2001 - Aug 2005, 5.4L, V8, 24V, SOHC, MPFI, W163, EngCode: M113.981
Mercedes Benz > R500 > Apr 2006 - Jun 2010, 5.0L, V8, 24V, SOHC, MPFI, W251, EngCode: M113.971
Mercedes Benz > S280 > Oct 1998 - Aug 2005, 2.8L, 6 cyl, 18V, SOHC, MPFI, W220, 150kW, EngCode: M112.922
Mercedes Benz > S320 > Oct 1998 - Aug 2002, 3.2L, V6, 18V, SOHC, MPFI, W220, EngCode: M112.944
Mercedes Benz > S350 > Mar 2003 - Feb 2006, 3.7L, V6, 18V, SOHC, MPFI, W220, 180kW, EngCode: M112.972
Mercedes Benz > S350L > Mar 2003 - Feb 2006, 3.7L, V6, 18V, SOHC, MPFI, W220, 180kW, EngCode: M112.972
Mercedes Benz > S430 > Mar 1999 - Feb 2006, 4.3L, V8, 24V, SOHC, MPFI, W220, 205kW, EngCode: M113.941
Mercedes Benz > S500 > Apr 1999 - Feb 2006, 5.0L, V8, 24V, SOHC, MPFI, W220, 225kW, EngCode: M113.960
Mercedes Benz > S500L > Apr 1999 - Feb 2006, 5.0L, V8, 24V, SOHC, MPFI, W220, 225kW, EngCode: M113.960
Mercedes Benz > S55 AMG > Mar 2003 - Feb 2006, 5.4L, V8, 24V, SOHC, MPFI, W220, 368kW, EngCode: M113.995
Mercedes Benz > SL350 > Oct 2003 - Apr 2006, 3.7L, V6, 18V, SOHC, MPFI, R230, 180kW, EngCode: M112.973
Mercedes Benz > SL500 > Jul 2002 - Apr 2006, 5.0L, V8, 24V, SOHC, MPFI, R230, EngCode: M113.963
Mercedes Benz > SL55 AMG > Sep 2002 - Apr 2006, 5.4L, V8, 24V, SOHC, SCMPFI, R230, EngCode: M113.992, Supercharged
Mercedes Benz > SL55 AMG > May 2006 - May 2008, 5.4L, V8, 24V, SOHC, SCMPFI, R230, EngCode: M113.995, Supercharged
Mercedes Benz > SLK 55 AMG > Apr 2005 - Jun 2011, 5.4L, V8, 24V, SOHC, SCMPFI, R171, 265kW, EngCode: M113.989
Mercedes Benz > SLK32 AMG > Sep 2001 - Jul 2004, 3.2L, V6, 18V, SOHC, SCMPFI, R170, 260kW, EngCode: M112.960
Mercedes Benz > SLK320 > Jul 2000 - Jul 2004, 3.2L, V6, 18V, SOHC, SCMPFI, R170, 160kW, EngCode: M112.947
Mercedes Benz > Viano > Jul 2005 - Jan 2010, 3.7L, V6, 24V, SOHC, MPFI, W639, EngCode: M112.976
Mercedes Benz > Vito > Apr 2004 - Nov 2006, 3.2L, V6, 18V, DOHC, MPFI, 119P, 140kW, EngCode: M112.951
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