Passat Sedan V6-2792cc 2.8L DOHC (AAA) SFI (1997)
_sfi/Page-375001.png)
Piston Ring: Testing and Inspection
CHECKING PISTON RING GAP
-
Push ring squarely from above down to approx. 15 mm (0.5910 inch) from bottom end of cy1inder.
-
To do this use a piston without rings as an installation tool.
Piston ring Gap
Compression rings:
^
New: 0.20-0.40 mm (0.0078-0.0157 inch).
^
Wear limit: 1.00 mm (0.0394 inch).
Oil Scraper Ring:
^
New: 0.25-0.50 mm (0.0098-0.0197 inch).
^
Wear limit: 1.00 mm (0.0394 inch).
CHECKING PISTON RING SIDE CLEARANCE
-
Clean ring groove before measurement.
Piston ring side clearance
Compression rings:
^
New: 0.02-0.07 mm (0.0007-0.0028 inch).
^
Wear limit: 0.15 mm (0.0059 inch).
Oil scraper ring:
^
New: 0.02-0.06 mm (0.0007-0.0023 inch).
^
Wear limit: 0.15 (0.0059 inch).
