Main Bearing Set for 1979-1990 Ford Mustang & More - Sealed 4979M .25MM

$104.99
Sealed Power Engine Crankshaft Main Bearing Set 4979M.25MM
Sealed Power Engine Crankshaft Main Bearing Set 4979M.25MM

Vehicles this part fits
    Part number: 4979M.25MM
    UPC: 724956146390
    Condition: New
    Weight: 1.50 LBS
    Item Package Quantity: 1
    $104.99
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    Sealed Power Engine Crankshaft Main Bearing Set P/N:4979M .25MM
    Sealed Power Engine Crankshaft Main Bearing Set P/N:4979M .25MM
    $104.99
    $104.99

    Sealed 4979M .25MM main bearing set for the 1979-1990 Ford Mustang 4-cylinder 2.3L and other vehicles supports the crankshaft and gives it a bearing surface to turn on. The set, also called crankshaft main bearings, sits between the crankshaft and the engine block.

    • Steel-backed bronze alloy lining with overplate
    • Fatigue resistance and strength, with the conformability that older applications require
    • Exacting tolerances from state-of-the-art manufacturing
    • 0.25 mm undersize

    Quick facts

    • Part: Sealed 4979M .25MM main bearing set
    • Also called: crankshaft main bearings
    • Fits: 1979-1990 Ford Mustang 4-cylinder 2.3L and other vehicles
    • Material: Steel backed overplated bronze alloy
    • Condition: New

    A knock from the lower engine or an oil pressure warning light can mean worn main bearings. Low oil level can also trigger that light, so these signs alone do not prove the bearings are the problem. The engine takes one set, and this listing is one set.

    Fits

    Listed for a wide range of Ford, Mercury and Merkur models, including the 1983-1988 Ford Ranger 4-cylinder 2.0L or 2.3L and the 1985-1989 Merkur XR4Ti 4-cylinder 2.3L. The set meets or exceeds OEM specifications.

    Specifications

    Fit and size

    • Undersize: 0.25 mm
    • Quantity per application: 1 set

    Build and materials

    • Type: main bearing set
    • Material: steel backed overplated bronze alloy
    • Grade type: Premium
    • Condition: New
    • Country of origin: Mexico

    Interchange: BC289J.25 · 5M2185-010 · MB582AM0.25
    5M1117P10 · 0143339 · MS1117P25MM · MS3117P25MM

    This part cross-references / interchanges with the following part numbers:

    5M1117P10, 0143339, MS1117P25MM, BC289J.25, 5M2185-010, MB582AM0.25, MS3117P25MM

    Frequently Asked Questions

    Is the Sealed 4979M .25MM main bearing set right for the 1983-1988 Ford Ranger 4-cylinder 2.0L or 2.3L?

    Yes. Sealed 4979M .25MM is listed for the 1983-1988 Ford Ranger with the 4-cylinder 2.0L or 2.3L. For any other car, check its years and engine in the "Vehicles it fits" section.

    What does the .25MM mean in this main bearing set's part number?

    It marks the undersize: this set is 0.25 mm undersize, as listed for Sealed 4979M .25MM.

    Are these main bearings steel-backed?

    Yes. This set has a steel-backed bronze alloy lining with an overplate, a construction valued for fatigue resistance and strength.

    What can worn main bearings sound like?

    A knock from the lower part of the engine or a low oil pressure light can go with worn main bearings. A shop can confirm it by inspecting the bearings.

    Does Sealed 4979M .25MM replace the MS1117P25MM main bearing set?

    Yes. MS1117P25MM is one of the numbers Sealed 4979M .25MM replaces, along with BC289J.25 and MB582AM0.25.

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