REP-TAT-P-1125-13 Measuring all pistons

WARNING: This page is about a different car, the 2018 BMW 340i, 2017 BMW 340i, and 2016 BMW 340i. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: The description is for one component only. The procedure is identical for all further components.

Measuring piston

Check

Position micrometer in area (A) and measure piston installation clearance transversely to piston pin.

TECHNICAL DATA SPECIFICATIONS

Piston diameter
Measure the piston diameter at distance (A) from the lower end of the piston skirt. Courtesy of BMW OF NORTH AMERICA, INC.	Distance (A) to the lower end of the piston skirt	14 mm
	Nominal dimension of piston diameter	81.953 mm... 81.971 mm

Courtesy of BMW OF NORTH AMERICA, INC.

Result

» Piston does not correspond to the specifications.

Measure

Replace the piston.