Piston Weight Classes
PISTON WEIGHT CLASSESWeight Classes for Mahle Pistons
Pistons are weighed with accessories (piston pin, piston rings and circlips).
Complete piston weight in g
Weight tolerance within set
of pistons
Engine Type 930/21/25
Standard 613 to 617 --
617 to 621 -
Permissible tolerance = ± 4g 621 to 625 +
625 to 629 ++
For replacements: 613 to 621 -- or -
Permissible tolerance = ± 8g 621 to 629 + or ++
Weight Classes for KS Pistons
Pistons are weighed with accessories (piston pin, piston rings and circlips).
Complete piston weight in g
Weight tolerance within set
of pistons
Engine Type 930/25
Standard 650 to 654 --
654 to 658 -
Permissible tolerance = ± 4g 658 to 662 +
662 to 666 ++
For replacements: 650 to 658 -- or -
Permissible tolerance = ± 8g 658 to 666 + or ++