[h2pmr]

pictured below is a piston from an 88/89 S4
number cast on the inside of the skirt is 100 so i guess it could be 928 103 043 29, anybody know what the 197 below it stands for?
but it has a 1 stamped on the top of the piston, does that mean its a tolerance group 1 so ending in part number 19 or 69 ?
cheers
Phil

[mr928]

since it is a group 1 piston the number is 928-103-043-19
29 is group 2

[h2pmr]

since it is a group 1 piston the number is 928-103-043-19
29 is group 2

thanks for the reply, but could it also be a 928 103 043 69 piston have which is also a group 1?
cheers
Phil

[h2pmr]

or in better English
but could it also be a 928 103 043 69 piston which is also a group 1?

[mr928]

since it is a group 1 piston the number is 928-103-043-19
29 is group 2

thanks for the reply, but could it also be a 928 103 043 69 piston have which is also a group 1?
cheers
Phil

the 928-103-043-69 is a 100,49 size piston and group 1

[h2pmr]

but are there any markings, castings etc on a piston to prove which size it is 99.99 or 100.49mm?