Q7 Quattro V8-4.2L (BAR) (2008)
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Piston Ring: Specifications
Piston Ring End Gaps
1st Compression ring
New ..................................................................................................................................................................................................... 0.20 to 0.35 mm
Wear limit ......................................................................................................................................................................................................... 0.8 mm
2nd Compression ring
New ..................................................................................................................................................................................................... 0.20 to 0.40 mm
Wear limit ......................................................................................................................................................................................................... 0.8 mm
Oil scraping ring
New ..................................................................................................................................................................................................... 0.20 to 0.40 mm
Wear limit ......................................................................................................................................................................................................... 0.8 mm
Piston Ring Side Clearance
1st Compression ring
New ................................................................................................................................................................................................. 0.035 to 0.085 mm
Wear limit ....................................................................................................................................................................................................... 0.20 mm
2nd Compression ring
New ................................................................................................................................................................................................. 0.005 to 0.045 mm
Wear limit ....................................................................................................................................................................................................... 0.15 mm
Oil scraping ring
New ................................................................................................................................................................................................. 0.010 to 0.050 mm
Wear limit ....................................................................................................................................................................................................... 0.20 mm
