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2003 Peterbilt 378

2003 Peterbilt 378 Accessory Belt Idler Pulleys

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Dayco Gold Label No Slack Heavy Duty Series Accessory Belt Idler Pulley - Direct Fit, Sold individually
Part Number: DY89101
Guaranteed to Fit
$30.49
Vehicle Fitment
  • 2003 Peterbilt 378 Base 6 Cyl 12.0L
  • 2003 Peterbilt 378 Base 6 Cyl 10.3L
Product Details
Location : Fan and AlternatorWarranty : 1 year or 12,000-mile Dayco limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Condition : NewSeries : Dayco Gold Label No Slack Heavy Duty SeriesMaterial : SteelRecommended Use : OE ReplacementProduct Fit : Direct Fit
No Slack Series Accessory Belt Idler Pulley - Direct Fit, Sold individually
Part Number: DY89120
Guaranteed to Fit
$38.49
Vehicle Fitment
  • 2003 Peterbilt 378 Base 6 Cyl 14.9L
Product Details
Location : Air ConditioningNotes : Serpentine Pulley Type; Steel Pulley Material; 06 Rib Max Belt Width; 81 mm Pulley Diameter; 29.6 mm Pulley Width; 17 mm Bearing ID; (1) Bearing; With FlangeWarranty : 1 year or 12,000-mile Dayco limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : No Slack SeriesRecommended Use : OE ReplacementProduct Fit : Direct Fit
No Slack Series Accessory Belt Idler Pulley - Direct Fit, Sold individually
Part Number: DY89106
Guaranteed to Fit
$44.99
Vehicle Fitment
  • 2003 Peterbilt 378 Base 6 Cyl 14.9L
Product Details
Location : Fan and Water PumpNotes : Serpentine Assembly Pulley Type; Steel Pulley Material; 08 Rib Max Belt Width; 86.5 mm Pulley Diameter; 39.4 mm Pulley Width; 17 mm Bearing ID; (2) Bearings; FlatWarranty : 1 year or 12,000-mile Dayco limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Condition : NewSeries : No Slack SeriesReplaces OE Number : 1833688C2, 1839967C1, 1980801, 3970945, 87326913, 87332597, 87395363, 89022559, DC093001141Material : SteelRecommended Use : OE ReplacementProduct Fit : Direct Fit
Dayco Gold Label No Slack Heavy Duty Series Accessory Belt Idler Pulley - Direct Fit, Sold individually
Part Number: DY89110
Guaranteed to Fit
$61.49
Vehicle Fitment
  • 2003 Peterbilt 378 Base 6 Cyl 14.9L
Product Details
Location : Fan and AlternatorNotes : 2 bearings; 17 mm ID; 74 mm pulley DiameterWarranty : 1 year or 12,000-mile Dayco limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Series : Dayco Gold Label No Slack Heavy Duty SeriesRecommended Use : OE ReplacementProduct Fit : Direct Fit
Accessory Belt Idler Pulley - Direct Fit, Sold individually
Part Number: CTT49149
Guaranteed to Fit
$99.99
Vehicle Fitment
  • 2003 Peterbilt 378 Base 6 Cyl 14.9L enginedesignationname: ISX 15.0, enginemfrname: Cummins, Alternator and Air Conditioning; Grooved Pulley
Product Details
Warranty : 5 Year Continental Limited WarrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Promotions : European Vehicle PartsNumberof Grooveson Pulley : 6-Groove PulleyMaterial : SteelRecommended Use : OE ReplacementProduct Fit : Direct Fit
Accessory Belt Idler Pulley - Universal, Sold individually
Part Number: H1997150
Universal Fit
$56.85
Product Details
Warranty : 90-day Holley limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Recommended Use : PerformanceProduct Fit : Universal
Accessory Belt Idler Pulley - Universal, Sold individually
Part Number: H1997153
Universal Fit
$69.49
Product Details
Warranty : 90-day Holley limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Recommended Use : PerformanceProduct Fit : Universal
Accessory Belt Idler Pulley - Universal, Sold individually
Part Number: H1997240
Universal Fit
$145.95
Product Details
Warranty : 90-day Holley limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Recommended Use : Performance ReplacementProduct Fit : Universal
Accessory Belt Idler Pulley - Universal, Sold individually
Part Number: H1997241
Universal Fit
$145.95
Product Details
Warranty : 90-day Holley limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Recommended Use : Performance ReplacementProduct Fit : Universal
Accessory Belt Idler Pulley - Universal, Sold individually
Part Number: H1997242
Universal Fit
$127.95
Product Details
Warranty : 90-day Holley limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Recommended Use : Performance ReplacementProduct Fit : Universal
Accessory Belt Idler Pulley - Universal, Sold individually
Part Number: H1997249
Universal Fit
$35.86
Product Details
Warranty : 90-day Holley limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Recommended Use : Performance ReplacementProduct Fit : Universal
Accessory Belt Idler Pulley - Universal, Sold individually
Part Number: H1997265
Universal Fit
$139.95
Product Details
Warranty : 90-day Holley limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Recommended Use : Performance ReplacementProduct Fit : Universal
Accessory Belt Idler Pulley - Universal, Sold individually
Part Number: H1997266
Universal Fit
$72.75
Product Details
Warranty : 90-day Holley limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Recommended Use : Performance ReplacementProduct Fit : Universal
Accessory Belt Idler Pulley - Universal, Sold individually
Part Number: H1997269
Universal Fit
$145.95
Product Details
Warranty : 90-day Holley limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Recommended Use : Performance ReplacementProduct Fit : Universal
Accessory Belt Idler Pulley - Universal, Sold individually
Part Number: H1997344
Universal Fit
$28.40
Product Details
Warranty : 90-day Holley limited warrantyQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Recommended Use : Performance ReplacementProduct Fit : Universal
Page 1 of 1 | Showing 1 - 15 of 15 results

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Where is the Idler Pulley Located?
Where is the Idler Pulley Located?Accessing the idler pulley can be deceptively tricky and you’ll need tools like a socket set and a torque wrench. It varies though, and on some engines it’s very easy but the belt needs to be removed first. .ud15f7f9e16f04f8cd5728764afaad64b { padding:0px; margin: 0; padding-top:1em!important; padding-bottom:1em!important; width:100%; display: block; font-weight:bold; background-color:#eaeaea;
Bad Idler Pulley Symptoms Plus Replacement Recommendations
Bad Idler Pulley Symptoms Plus Replacement RecommendationsTo fully understand the function of an idler pulley, let’s look at how the whole mechanism works. If you own a modern vehicle, it probably has one serpentine belt rather than multiple V-belts.