Enginetech BB310J

Enginetech BB310J is a connecting rod bearing set. Rod bearings run between the connecting rod and the crankshaft rod journal, maintaining the oil film under load.

Application / fitment

The BB310J family is associated with GM / Cadillac Northstar 4.0 / 244, 4.4 / 267 and 4.6 / 281 engines. Suffix variants such as .25 and .50 indicate undersize crankshaft-grind versions, so BB310J without a suffix should be confirmed against package marking and crankshaft measurements before installation.

• part type: connecting rod bearings
• operating location: connecting rod and crankshaft rod journal
• function: rod oil clearance and oil-film support
• part family: BB310J for GM / Cadillac Northstar 4.0 / 244, 4.4 / 267, 4.6 / 281 applications
• suffix variants .25 and .50 identify undersize versions
• standard bearing thickness without undersize listed for related variants: 0.062" / 1.57 mm
• typical package quantity in this family: set of 8

Do not install rod bearings by catalog number alone. Measure crankshaft journals, check taper and out-of-round, verify bearing width and confirm oil clearance to the engine specification. After torqueing, the rod must move freely without tight spots.

Technical information

• part type: connecting rod bearing set
• operating area: crankshaft rod journals
• application family: GM / Cadillac Northstar 4.0 / 244, 4.4 / 267, 4.6 / 281
• reference standard thickness: 0.062" / 1.57 mm
• checks: journal diameter, oil clearance, bearing width, size marking
• sale unit: 1 set