At LowPricedAutoParts we proudly offer genuine Enginetech BB157J.25 .25 oversize connecting rod bearings (4-piece set) designed specifically for the 2002-2009 Chevrolet, GMC, Buick, Isuzu, and Saab 4.2L naturally aspirated Vortec inline-6 engines in Trailblazer, Envoy, Rainier, Ascender, 9-7x and equivalent models after crankshaft grinding.
Manufactured to tight tolerances: shaft diameter 2.0863-2.0870", housing bore 2.2050-2.2055", wall thickness 0.0582-0.0587", width 0.779", oil clearance 0.0006-0.0028". These bearings perform reliably in towing, hauling, daily driving, and family-use conditions typical of these popular SUVs & trucks.
Key benefits include:
Oversize design restores proper clearances on machined journals
Wide oil clearance range accommodates standard 4.2L operation
Helps reduce friction and maintain engine efficiency
Whether addressing bearing wear, rod knock, or performing preventative maintenance during timing chain, head gasket, or full engine service, these bearings help deliver quiet, dependable performance you can count on.
Always confirm crankshaft journal measurements (machined to match oversize) and VIN for exact match. Professional installation recommended to verify clearances and follow torque procedures correctly.
Shop confidently with LowPricedAutoPartsfast shipping, expert support, and our commitment to your satisfaction on every Enginetech part. Get your GM or Saab back to peak reliability today.
