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Home >> BMW >> 2017 >> 530i >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine - Pistons/Counterbalance Shafts - Repair (G30) >> 11 25 Piston With Rings And Bolts >> 11 25 671 Replace the piston rings for all pistons (piston removed) (M550i xDrive, 2018-2019) >> Measure the end clearance on the piston ring

Measure the end clearance on the piston ring

TECHNICAL DATA - CLEARANCE PISTON RING SPECIFICATION

Piston ring 1st groove S
End clearance. 0.15... 0.30 mm
TECHNICAL DATA - CLEARANCE PISTON RING SPECIFICATION

Piston ring 2nd groove S
End clearance. 0.30... 0.50 mm
G11645043Courtesy of BMW OF NORTH AMERICA, INC.
TECHNICAL DATA - CLEARANCE PISTON RING SPECIFICATION

Piston ring 3rd groove S
End clearance without spiral expander. 0.25... 0.50 mm