Volkswagen Type II Transporter 1200 Series Shop Manual page 25

The rings must be fitted to the piston with the word
TOP or OBEN towards the crown of the piston.
From February 1963, Chassis No 1072658 (Engine No
0168330) modified pistons and rings were fitted to all
1500cc engines. The new type of ring can be installed in the
old type pistons but do not instal the old type piston rings
on the new type pistons.
When installing the cylinder to the piston ensure that
the ring gaps are not in line but equally staggered, the gap
of the oil scraper ring should be at the top when the piston
assumes its normal horizontal running position.
Check the fit of the gudgeon pin in the connecting rod
small end bush which should have a clearance of .0001"
-.0006", the maximum wear limit is .0016".
Should the wear limit be reached, the pin and small
end bush require replacing, an oversize gudgeon pin should
not be fitted in this case.
The gudgeon pin may be a light finger push fit in the
piston without any piston heating being required, this
depends on the amount of permissible tolerance
discrepancy between the pin and bearing and is quite
normal and therefore replacement is not required.
Engine-19
Details of Piston Crown Markings. Arrow Points Towards
Flywheel. Letter A is index to piston part number and
serves as identification. Minus symbol (-) denotes weight
grading. 85-45 is piston size in mm.
Pistons Correctly Positioned in Bores with Arrows pointing to Flywheel.
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