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Sealed Power 6689MA Engine Crankshaft Main Bearing SetOE Quality 60-Day Returns
Part #: 6689MA

Sealed Power 6689MA Engine Crankshaft Main Bearing Set

⚙️ 148 vehicles fit this part
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🚗Fitment: Chevrolet, GMC, Buick, Oldsmobile, Pontiac, American Motors, and Jeep, LLV, S10, Sonoma, Century, Lumina, Cutlass Ciera, Cutlass Cruiser, 6000, Astro, Celebrity, S15, Safari, S10 Blazer, S15 Jimmy, Fiero, Camaro, Firebird, Skylark, Citation II, Omega, Phoenix, Eagle, Citation, CJ5, CJ7, DJ5, Scrambler, Concord, Spirit, Monza, Starfire, Sunbird, Astre, and Ventura
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Overview of Sealed Power Engine Crankshaft Main Bearing Set 6689MA

The Sealed Power 6689MA engine crankshaft main bearing set is designed for reliable performance in a range of GM and Jeep vehicles. Constructed from A-series aluminum, this standard size full set provides essential durability and precision for engine rebuilds and repairs.

  • Full set of main bearings for complete engine crankshaft support
  • Made from A-series aluminum for strength and wear resistance
  • Standard size bearings suitable for OEM specifications
  • Compatible with multiple makes including Buick, Chevrolet, GMC, Jeep, Oldsmobile, and Pontiac
  • Part number 6689MA ensures correct fitment and quality

Detailed Product Description

This Sealed Power engine crankshaft main bearing set (part number 6689MA) features A-series aluminum construction, which offers a balance of durability and heat dissipation critical for engine longevity. The standard size bearings are engineered to meet factory specifications, making them suitable for a variety of engine rebuilds. This full set is compatible with numerous GM and Jeep models such as the Chevrolet Camaro, GMC S10, Buick Century, Jeep CJ5 and CJ7, Pontiac Firebird, and Oldsmobile Cutlass Ciera, among others. Using this bearing set helps maintain proper crankshaft alignment and reduces friction, which is vital for engine performance and reliability.

Compatible Vehicles and Applications

  • Buick Century, Skylark, and Regal models
  • Chevrolet Camaro, Astro, Lumina, and S10 Blazer
  • GMC S10, S15, and Sonoma trucks
  • Jeep CJ5, CJ7, Scrambler, and Cherokee
  • Oldsmobile Cutlass Ciera and Cruiser
  • Pontiac Firebird, Fiero, Sunbird, and Phoenix

Common Issues Addressed by This Bearing Set

  • Excessive crankshaft wear due to bearing failure
  • Engine knocking caused by worn main bearings
  • Oil pressure loss related to bearing clearance problems
  • Reduced engine performance from improper crankshaft support
  • Overheating and premature bearing wear in high-stress conditions

Installation Notes and Tips

  • Ensure engine block and crankshaft surfaces are clean and free of debris before installation
  • Verify bearing clearances with proper measuring tools to meet OEM specifications
  • Use assembly lubricant on bearing surfaces during installation to prevent initial wear
  • Follow torque specifications for main bearing caps to avoid distortion
  • Inspect crankshaft journals for scoring or damage prior to bearing installation

Quality Assurance and Warranty

Sealed Power maintains strict quality control standards for the 6689MA bearing set, ensuring consistent material properties and dimensional accuracy. The use of A-series aluminum material complies with industry standards for engine components. While specific warranty details may vary, Sealed Power products typically come with a limited warranty against manufacturing defects. Always consult product documentation or authorized sources for warranty terms.

BrandSealed Power
Part Number6689MA
Package AlertFull set
Part MaterialA-Series aluminum
Standard SizeStandard

This part fits 148 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
1993ChevroletS102.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1993GMCSonoma2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1992BuickCentury2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1992ChevroletLumina2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1992ChevroletS102.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1992GMCSonoma2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1992OldsmobileCutlass Ciera2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1992OldsmobileCutlass Cruiser2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1991BuickCentury2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1991ChevroletLumina2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1991ChevroletS102.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1991GMCSonoma2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1991OldsmobileCutlass Ciera2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1991OldsmobileCutlass Cruiser2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1991Pontiac60002.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1990BuickCentury2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1990ChevroletAstro2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1990ChevroletCelebrity2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1990ChevroletLumina2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1990ChevroletS102.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1990GMCS152.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1990GMCSafari2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1990OldsmobileCutlass Ciera2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1990OldsmobileCutlass Cruiser2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1990Pontiac60002.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1989BuickCentury2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1989ChevroletAstro2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1989ChevroletCelebrity2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1989ChevroletS102.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1989GMCS152.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1989GMCSafari2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1989OldsmobileCutlass Ciera2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1989OldsmobileCutlass Cruiser2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1989Pontiac60002.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1988BuickCentury2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1988ChevroletAstro2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1988ChevroletCelebrity2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1988ChevroletS102.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1988ChevroletS10 Blazer2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1988GMCS152.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1988GMCS15 Jimmy2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1988GMCSafari2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1988OldsmobileCutlass Ciera2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1988OldsmobileCutlass Cruiser2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1988Pontiac60002.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1988PontiacFiero2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1987BuickCentury2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1987ChevroletAstro2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1987ChevroletCelebrity2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1987ChevroletS102.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1987ChevroletS10 Blazer2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1987GMCS152.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1987GMCS15 Jimmy2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1987GMCSafari2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1987OldsmobileCutlass Ciera2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1987OldsmobileCutlass Cruiser2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1987Pontiac60002.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1987PontiacFiero2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1986BuickCentury2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1986ChevroletAstro2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1986ChevroletCamaro2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1986ChevroletCelebrity2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1986ChevroletS102.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1986ChevroletS10 Blazer2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1986GMCS152.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1986GMCS15 Jimmy2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1986GMCSafari2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1986OldsmobileCutlass Ciera2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1986Pontiac60002.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1986PontiacFiero2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1986PontiacFirebird2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1985BuickCentury2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1985BuickSkylark2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1985ChevroletAstro2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1985ChevroletCamaro2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1985ChevroletCelebrity2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1985ChevroletCitation II2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1985ChevroletS102.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1985ChevroletS10 Blazer2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1985GMCS152.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1985GMCS15 Jimmy2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1985GMCSafari2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1985OldsmobileCutlass Ciera2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1985Pontiac60002.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1985PontiacFiero2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1985PontiacFirebird2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1984BuickCentury2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1984BuickSkylark2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1984ChevroletCamaro2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1984ChevroletCelebrity2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1984ChevroletCitation II2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1984OldsmobileCutlass Ciera2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1984OldsmobileOmega2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1984Pontiac60002.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1984PontiacFiero2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1984PontiacFirebird2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1984PontiacPhoenix2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1983BuickCentury2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1983BuickSkylark2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1983ChevroletCamaro2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1983ChevroletCelebrity2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1983ChevroletCitation2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1983JeepCJ52.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1983JeepCJ72.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1983JeepScrambler2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1983OldsmobileCutlass Ciera2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1983OldsmobileOmega2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1983Pontiac60002.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1983PontiacFirebird2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1983PontiacPhoenix2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1982BuickCentury2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1982BuickSkylark2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1982ChevroletCamaro2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1982ChevroletCelebrity2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1982ChevroletCitation2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1982JeepCJ52.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1982JeepCJ72.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1982JeepScrambler2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1982OldsmobileCutlass Ciera2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1982OldsmobileOmega2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1982Pontiac60002.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1982PontiacFirebird2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1982PontiacPhoenix2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1981BuickSkylark2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1981ChevroletCitation2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1981JeepCJ52.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1981JeepCJ72.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1981JeepScrambler2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1981OldsmobileOmega2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1981PontiacPhoenix2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1980BuickSkylark2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1980ChevroletCitation2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1980ChevroletMonza2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1980JeepCJ52.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1980JeepCJ72.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1980OldsmobileOmega2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1980OldsmobileStarfire2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1980PontiacPhoenix2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1980PontiacSunbird2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1979ChevroletMonza2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1979OldsmobileStarfire2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1979PontiacSunbird2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1978ChevroletMonza2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1978OldsmobileStarfire2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1978PontiacPhoenix2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1978PontiacSunbird2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1977PontiacPhoenix2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.
1977PontiacSunbird2.5LL4N/AFits standard size engine connecting rod bearings for A-Series aluminum engines.

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

211235M1733PMB5532AMMS1644PMS1733PMS3644PMS6689ALPMS21123

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

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