– Firmly position piston fitting tool on cylinder block and push
piston fully into cylinder bore.
– Once piston has been installed, relocate dowel sleeve
-arrow- in its bore.
– Oil running surfaces of bearing shells.
– Install conrod bearing cap, noting installation position and tor‐
.
– Install sump
.
.
4.3
Checking pistons and cylinder bores
Checking piston ring gap:
Special tools and workshop equipment required
♦ Feeler gauge
Test sequence
– Push ring at right angles to cylinder wall from above down to
approx. 15 mm from bottom end of cylinder. Push in using a
piston without rings.
Piston ring
Ring gap
New
Wear limit
Rectangular-section ring
mm 0.30 … 0.45
1.0
Taper faced Napier ring
mm 0.30 … 0.50
1.0
Oil scraper ring
mm 0.20 … 0.90
1.2
Checking ring-to-groove clearance:
Special tools and workshop equipment required
♦ Feeler gauge
CC 2012 ➤ , Passat 2011 ➤ , Passat Variant 2011 ➤
6-cylinder direct-injection engine (3.6 l engine, 4V) - Edition 06.2019
4. Pistons and conrods
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