A6 Quattro Sedan V6-3.0L (AVK) (2002)
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10. Replace O-ring seal (Figure 5, Point 2) on the chain tensioner (Figure 5, Point 3). See Repair Manual >> Engine >> Engine Mechanical >> 17
Lubrication >> Removal+Installation >> Oil pump Drive or Chain Tensioner.
11. If repair was needed in Step 10, check the engine oil pressure again, according to 1d.
Only proceed if the oil pressure is still below the specified values after completing the above steps:
12. Replace the oil control valves (Figure 6, Points 2 and 12) and the spray jet valve (Figure 6, Point 9) in the valley. Replace O-rings (Figure 6, Points 1
and 11) Figure 6. The oil control valves (2 and 12), spray jet valve (9) and O-Rings (1 and 11).