Universal Belt Tensioner Pulley Dayco - 89120

Part number 89120

Dayco 89120 has a cataloged steel serpentine pulley with 6 grooves. Its listed pulley overall diameter is 81 mm / 3.189 in.

Confirm the exact application and configuration before selecting this part. Reference numbers and similar configurations do not guarantee interchange.

Specifications

Part number / SKU	89120
Brand	Dayco
Department	Belts & Tensioners
Part type	Tensioners
Pulley overall diameter	81 mm / 3.189 in Conditions / details Manufacturer catalog dimensions for this exact Dayco number only. Competitive pulleys may vary slightly, as the table footnote warns. Dimensions alone do not establish vehicle fitment, an interchangeable competitor article, current stock revision or complete kit contents. Both printed mm/in values are retained verbatim, not recalculated. Bearing ID1 is not silently renamed bolt bore. Generic overview marketing statements are not exact-part specifications.
Pulley overall width	29.6 mm / 1.165 in Conditions / details Manufacturer catalog dimensions for this exact Dayco number only. Competitive pulleys may vary slightly, as the table footnote warns. Dimensions alone do not establish vehicle fitment, an interchangeable competitor article, current stock revision or complete kit contents. Both printed mm/in values are retained verbatim, not recalculated. Bearing ID1 is not silently renamed bolt bore. Generic overview marketing statements are not exact-part specifications.
Bearing ID1	17 mm / 0.669 in Conditions / details Manufacturer catalog dimensions for this exact Dayco number only. Competitive pulleys may vary slightly, as the table footnote warns. Dimensions alone do not establish vehicle fitment, an interchangeable competitor article, current stock revision or complete kit contents. Both printed mm/in values are retained verbatim, not recalculated. Bearing ID1 is not silently renamed bolt bore. Generic overview marketing statements are not exact-part specifications.
Number of grooves	6 Conditions / details Manufacturer catalog dimensions for this exact Dayco number only. Competitive pulleys may vary slightly, as the table footnote warns. Dimensions alone do not establish vehicle fitment, an interchangeable competitor article, current stock revision or complete kit contents. Both printed mm/in values are retained verbatim, not recalculated. Bearing ID1 is not silently renamed bolt bore. Generic overview marketing statements are not exact-part specifications.
Pulley type	Serpentine Conditions / details Manufacturer catalog dimensions for this exact Dayco number only. Competitive pulleys may vary slightly, as the table footnote warns. Dimensions alone do not establish vehicle fitment, an interchangeable competitor article, current stock revision or complete kit contents. Both printed mm/in values are retained verbatim, not recalculated. Bearing ID1 is not silently renamed bolt bore. Generic overview marketing statements are not exact-part specifications.
Pulley material	Steel Conditions / details Manufacturer catalog dimensions for this exact Dayco number only. Competitive pulleys may vary slightly, as the table footnote warns. Dimensions alone do not establish vehicle fitment, an interchangeable competitor article, current stock revision or complete kit contents. Both printed mm/in values are retained verbatim, not recalculated. Bearing ID1 is not silently renamed bolt bore. Generic overview marketing statements are not exact-part specifications.
Flanged	Yes Conditions / details Manufacturer catalog dimensions for this exact Dayco number only. Competitive pulleys may vary slightly, as the table footnote warns. Dimensions alone do not establish vehicle fitment, an interchangeable competitor article, current stock revision or complete kit contents. Both printed mm/in values are retained verbatim, not recalculated. Bearing ID1 is not silently renamed bolt bore. Generic overview marketing statements are not exact-part specifications.

Need a measurement or technical specification? Ask our parts team before choosing the part.

Cross References

Conditions applying to every reference below
Dayco catalog competitor/OE lookup directly prints this branded number alongside exact DAYCO: 89120.
Lookup direction is printed competitor/OE number to Dayco article; no universal or bidirectional interchange asserted.
Numeric lookup may return multiple products or brands; preserve exact printed owning Dayco article and configuration. No fitment or counterpart specifications inferred.
Brand / reference type	Part number	Notes
Continental Elite	49147	manufacturer-listed-cross-reference. Shared conditions also apply
Service Champ	49147	manufacturer-listed-cross-reference. Shared conditions also apply
CUMMINS	3689465	manufacturer-listed-cross-reference. Shared conditions also apply
PACCAR	3689465	manufacturer-listed-cross-reference. Shared conditions also apply
CUMMINS	3682229	manufacturer-listed-cross-reference. Shared conditions also apply

Fitment help

Source-listed applications — confirm configuration

Fitment notice

These source-qualified listings are not a fitment guarantee. Confirm the engine, OE number, installed equipment, mounting/configuration and VIN before selecting a part. Missing years or models have not been verified.

North American semi-truck models first where identified; consecutive listed years grouped without filling gaps.
Make	Model	Years
Not stated	grouped multi-make overview; engine group CAT C13/C16; Cummins ISL series, ISX12, ISX15, X15, Westport GX, Signature 600 Manufacturer labels model and engine group representative only; no assertion of every date/make/engine permutation. Verify exact pulley bore/diameter/offset and installed drive. Original source conditions 1999–2023 grouped multi-make overview; engine group CAT C13/C16; Cummins ISL series, ISX12, ISX15, X15, Westport GX, Signature 600 Manufacturer labels model and engine group representative only; no assertion of every date/make/engine permutation. Verify exact pulley bore/diameter/offset and installed drive.	1999-2023

Applications not listed here have not been verified.

Compare the number on your existing part. If you’re unsure, our parts team can help check the match before you order.

Detailed product and selection notes

Dayco 89120 has a cataloged steel serpentine pulley with 6 grooves. Its listed pulley overall diameter is 81 mm / 3.189 in.

Manufacturer catalog dimensions for this exact Dayco number only. Competitive pulleys may vary slightly, as the table footnote warns. Dimensions alone do not establish vehicle fitment, an interchangeable competitor article, current stock revision or complete kit contents. Both printed mm/in values are retained verbatim, not recalculated. Bearing ID1 is not silently renamed bolt bore. Generic overview marketing statements are not exact-part specifications.

Private source-bound prose candidate only; all original owner fields, unresolved notes and held claims remain bound unchanged. No new fitment, interchange, installation, package-content or current-stock claim is made.

Part type: Tensioners
Department: Belts & Tensioners

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89120