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Home >> BMW >> 2017 >> 340i Standard Trans >> Repair and Diagnosis (Single Page) >> Drivelines & Axles >> Differentials & Drive Axles >> Technical Data - 3' Series Sedan (6-CYL RWD Mechanical) >> Piston With Rings And Bolts

Piston With Rings And Bolts

TECHNICAL DATA SPECIFICATIONS

End clearance of center piston ring 
Before measuring the end clearance, make sure the cylinder is within the permissible tolerance.   0.20 mm... 0.28 mm
End clearance of upper piston ring 
Before measuring the end clearance, make sure the cylinder is within the permissible tolerance.   0.20 mm... 0.28 mm
Piston diameter 
Measure the piston diameter at distance (A) from the lower end of the piston skirt. Distance (A) to the lower end of the piston skirt  14 mm
G04739771Courtesy of BMW OF NORTH AMERICA, INC.
Nominal dimension of piston diameter  81.953 mm... 81.971 mm
Side clearance of center piston ring 
Clean all components before measuring the side clearance.   0.015 mm... 0.06 mm
Side clearance of upper piston ring 
Clean all components before measuring the side clearance.   0.035 mm... 0.085 mm