Measuring Piston-Ring Vertical Clearance

WARNING: This page is about a different car, the 2021 Porsche Macan, 2020 Porsche Macan, and 2019 Porsche Macan. However, it is still accessible from the selected car via links, so may be relevant.

Measure piston-ring vertical clearance.

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Piston-ring vertical clearance

1.1 Clean the ring groove on the piston.
1.2 Fit piston ring on the ring groove of the piston. > Piston-ring vertical clearance
1.3 Guide a feeler gauge into the gap between the piston ring and ring groove and determine the value. > Piston-ring vertical clearance

Piston ring	New in mm	Wear limit in mm
1st compression ring	0.03-0.07	0.15
2nd compression ring	0.02-0.07	0.15
Oil scraper ring	Cannot be measured	-