Dayco E040318 | Serpentine Belt

Part Number
E040318
Accessory Drive Belt

Fits: 08-14 Subaru Impreza, 08-11 Subaru Outback, 09-13 Subaru Forester, 13-14 Subaru WRX, 13-20 Subaru WRX STI

Special Price $24.64 Regular Price $28.99
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Dayco® ela™ (elastic) or stretch belts are specifically designed for two, three, and four point drives that are designed to use self-tensioning belts. Although these belts may look like standard poly rib belts, they are very different. These specially designed elastic belts have self-tensioning capabilities required by specific OE drives. Vehicles that are manufactured with stretch belts must replace them with stretch belts. These belts are not interchangeable with standard constructed belts of their same size. Dayco® ela™ belts utilize a proprietary EPDM construction that is designed to elongate over the fixed pulley system, and then maintain the required belt tension over the life of the belt. The backbone behind the Dayco® ela™ belt is its specially developed polyamide tensile member, which allows for high elongation required for installation, yet provides the proper tension maintenance properties to transmit the accessory loads demanded for the drive. This belt construction incorporates a wear resistant EPDM rib material, along with a highly elastic EPDM cushion rubber that surrounds the polyamide tensile cord, thus providing the required adhesion and flexibility to maintain lasting performance. Stretch belts have unique installation instructions depending on the OE application. Installation may require a specialized tool for the application or a simple zip tie. Do not attempt to install by prying the belt on the pulleys. Dayco provides detailed instructions on the reverse side of the sleeve.


BRAND: Dayco




FEATURES:


  • POLY RIB BELT, DAYCO


SPECIFICS:


3814
ColorBlack
Cross SectionK-Section
Effective Length0
Effective Length0
Free Length807.720
Free Length31.8
MaterialEPDM4
Maximum Operating Temperature212
Maximum Operating Temperature100
Minimum Operating Temperature-45
Minimum Operating Temperature-42.7
NotesDayco ela™ (elastic) belts are shorter than the installed length. When installed, this belt has internal elasticity which maintains proper tension and load carrying capacity over the life of the belt.
Outside Circumference0
Outside Circumference0
Rib DepthStandard
Rib ProfileStraight Rib
StandardsSAE J1459
Top Width.54



DOWNLOADS:




INTERCHANGE:


  • NAPA: 25-040317SF
  • ACDelco: 4K317SF
  • Goodyear: 4040317S
  • Subaru (cars): 11718-AA082
  • Gates: K040317SF
  • Subaru (cars): 23979-AA000
  • CARQUEST: K040317SF

APPLICATIONS:


  • 2009-2011 Subaru Outback - Position: Air Conditioning
    • Elastic Self-Tensioning Belt Installation Tool Required., Dayco Part 93878
  • 2013-2020 Subaru WRX STI - Position: Air Conditioning
    • Elastic Self-Tensioning Belt Installation Tool Required., Dayco Part 93878
  • 2009-2013 Subaru Forester - Position: Air Conditioning
    • Elastic Self-Tensioning Belt Installation Tool Required., Dayco Part 93878
  • 2008-2014 Subaru Impreza - Position: Air Conditioning
    • Elastic Self-Tensioning Belt Installation Tool Required., Dayco Part 93878
  • 2008-2008 Subaru Outback - Position: Air Conditioning
    • Elastic Self-Tensioning Belt Installation Tool Required., Dayco Part 93878 Submodel: Impreza
  • 2013-2014 Subaru WRX - Position: Air Conditioning
    • Elastic Self-Tensioning Belt Installation Tool Required., Dayco Part 93878
Customer Questions
Can a serpentine belt cause smoke?
Yes, a serpentine belt can cause smoke. A serpentine belt is an essential component of a vehicle's engine system. It drives various accessories such as the alternator, power steering pump, water pump, and air conditioning compressor. If the serpentine belt becomes worn, damaged, or misaligned, it can cause friction and generate smoke.
Why is my serpentine belt squealing?
The serpentine belt can squeal due to various reasons, including tension issues, worn-out belt, or a problem with the belt's pulleys.
Is my serpentine belt too tight?
If your serpentine belt is causing issues like excessive noise or accelerated wear on the pulleys, it may indicate that the belt is too tight.
Why did my serpentine belt come off?
Serpentine belts can come off due to factors such as belt wear, improper tension, misaligned pulleys, or a faulty tensioner.
Please, mind that only logged in users can submit questions

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