HomeEngine > Gaskets and Sealing SystemsMahle JV1668 Engine Main Bearing Gasket Set
Part #: JV1668

Mahle JV1668 Engine Main Bearing Gasket Set

46 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Chevrolet, GMC, Saab, Isuzu, Buick, and Oldsmobile, Trailblazer, Envoy, 9-7x, Ascender, Rainier, Trailblazer EXT, Envoy XL, Envoy XUV, and Bravada
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Overview of Mahle JV1668 Engine Main Bearing Gasket Set

The Mahle JV1668 Engine Main Bearing Gasket Set is designed for reliable sealing performance in select Buick, Chevrolet, GMC, Isuzu, Oldsmobile, and Saab vehicles. This gasket set includes a rear main retainer housing and features PTFE gasket and seal materials for durability and effective sealing.

  • Includes rear main retainer housing for comprehensive sealing
  • Gasket and seal made from PTFE material for chemical and temperature resistance
  • One-piece seal style for simplified installation and consistent sealing
  • Compatible with Buick, Chevrolet, GMC, Isuzu, Oldsmobile, and Saab models
  • Part number JV1668 ensures correct fitment and quality assurance

Technical Details and Material Specifications

This engine main bearing gasket set utilizes PTFE (polytetrafluoroethylene) for both gasket and seal components, providing excellent resistance to heat, oil, and chemical degradation. The one-piece seal design enhances sealing integrity around the rear main retainer housing, reducing the risk of leaks. The inclusion of the rear main retainer housing in the package ensures a complete sealing solution for the engine’s main bearing area.

Compatible Vehicles and Applications

The Mahle JV1668 gasket set is compatible with a range of vehicles including Buick, Chevrolet, GMC, Isuzu, Oldsmobile, and Saab. Specific models supported include the Saab 9-7x, Isuzu Ascender, GMC Bravada, Chevrolet Envoy, Envoy XL, Envoy XUV, Rainier, Trailblazer, and Trailblazer EXT. This compatibility ensures proper fitment and reliable sealing performance in these engines.

Common Issues Addressed by This Gasket Set

  • Prevents oil leaks from the engine main bearing area
  • Eliminates seal degradation caused by heat and chemical exposure
  • Reduces engine contamination from external debris
  • Maintains proper oil pressure by ensuring a tight seal
  • Prevents premature wear of engine components due to oil loss

Installation Notes and Tips

  • Ensure the engine surface is clean and free of old gasket material before installation
  • Use proper torque specifications when installing the rear main retainer housing
  • Inspect the crankshaft seal surface for damage prior to installation
  • Apply a thin layer of compatible lubricant to the PTFE seal to aid installation
  • Verify fitment with part number JV1668 before beginning installation

Quality Assurance and Warranty Information

Mahle manufactures the JV1668 gasket set to meet OEM standards for durability and performance. The use of PTFE materials ensures long-lasting resistance to heat and chemical exposure. While specific warranty details may vary, Mahle products typically come with a limited warranty against manufacturing defects, providing confidence in the product’s reliability for Buick, Chevrolet, GMC, Isuzu, Oldsmobile, and Saab applications.

BrandMahle
Part NumberJV1668
Additional Package ContentsRear Main Retainer Housing
Gasket IncludedYes
Gasket MaterialPTFE
Seal MaterialPTFE
Seal StyleOne Piece

This part fits 46 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2009ChevroletTrailblazer4.2LL6N/AContains Retainer Housing; PTFE
2009GMCEnvoy4.2LL6N/AContains Retainer Housing; PTFE
2009Saab9-7x4.2LL6N/AContains Retainer Housing; PTFE
2008ChevroletTrailblazer4.2LL6N/AContains Retainer Housing; PTFE
2008GMCEnvoy4.2LL6N/AContains Retainer Housing; PTFE
2008IsuzuAscender4.2LL6N/AContains Retainer Housing; PTFE
2008Saab9-7x4.2LL6N/AContains Retainer Housing; PTFE
2007BuickRainier4.2LL6N/AContains Retainer Housing; PTFE
2007ChevroletTrailblazer4.2LL6N/AContains Retainer Housing; PTFE
2007GMCEnvoy4.2LL6N/AContains Retainer Housing; PTFE
2007IsuzuAscender4.2LL6N/AContains Retainer Housing; PTFE
2007Saab9-7x4.2LL6N/AContains Retainer Housing; PTFE
2006BuickRainier4.2LL6N/AContains Retainer Housing; PTFE
2006ChevroletTrailblazer4.2LL6N/AContains Retainer Housing; PTFE
2006ChevroletTrailblazer EXT4.2LL6N/AContains Retainer Housing; PTFE
2006GMCEnvoy4.2LL6N/AContains Retainer Housing; PTFE
2006GMCEnvoy XL4.2LL6N/AContains Retainer Housing; PTFE
2006IsuzuAscender4.2LL6N/AContains Retainer Housing; PTFE
2006Saab9-7x4.2LL6N/AContains Retainer Housing; PTFE
2005BuickRainier4.2LL6N/AContains Retainer Housing; PTFE
2005ChevroletTrailblazer4.2LL6N/AContains Retainer Housing; PTFE
2005ChevroletTrailblazer EXT4.2LL6N/AContains Retainer Housing; PTFE
2005GMCEnvoy4.2LL6N/AContains Retainer Housing; PTFE
2005GMCEnvoy XL4.2LL6N/AContains Retainer Housing; PTFE
2005GMCEnvoy XUV4.2LL6N/AContains Retainer Housing; PTFE
2005IsuzuAscender4.2LL6N/AContains Retainer Housing; PTFE
2005Saab9-7x4.2LL6N/AContains Retainer Housing; PTFE
2004BuickRainier4.2LL6N/AContains Retainer Housing; PTFE
2004ChevroletTrailblazer4.2LL6N/AContains Retainer Housing; PTFE
2004ChevroletTrailblazer EXT4.2LL6N/AContains Retainer Housing; PTFE
2004GMCEnvoy4.2LL6N/AContains Retainer Housing; PTFE
2004GMCEnvoy XL4.2LL6N/AContains Retainer Housing; PTFE
2004GMCEnvoy XUV4.2LL6N/AContains Retainer Housing; PTFE
2004IsuzuAscender4.2LL6N/AContains Retainer Housing; PTFE
2004OldsmobileBravada4.2LL6N/AContains Retainer Housing; PTFE
2003ChevroletTrailblazer4.2LL6N/AContains Retainer Housing; PTFE
2003ChevroletTrailblazer EXT4.2LL6N/AContains Retainer Housing; PTFE
2003GMCEnvoy4.2LL6N/AContains Retainer Housing; PTFE
2003GMCEnvoy XL4.2LL6N/AContains Retainer Housing; PTFE
2003IsuzuAscender4.2LL6N/AContains Retainer Housing; PTFE
2003OldsmobileBravada4.2LL6N/AContains Retainer Housing; PTFE
2002ChevroletTrailblazer4.2LL6N/AContains Retainer Housing; PTFE
2002ChevroletTrailblazer EXT4.2LL6N/AContains Retainer Housing; PTFE
2002GMCEnvoy4.2LL6N/AContains Retainer Housing; PTFE
2002GMCEnvoy XL4.2LL6N/AContains Retainer Housing; PTFE
2002OldsmobileBravada4.2LL6N/AContains Retainer Housing; PTFE

* 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:

BS 40678

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