A4 Quattro Sedan V6-2.8L (ACK) (1997)
Valve Guide Seal: Service and Repair
Replacing
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Cylinder head installed
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Lock carrier in service position. Refer to Engine, disassembling and assembling.
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Remove ribbed belt. Refer to Ribbed belt, removing and installing.
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Remove toothed belt. Refer to Toothed belt, removing and installing.
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Remove camshafts. Refer to Camshafts and camshaft adjusters, removing and installing.
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Remove valve lifters (do not interchange) and lay aside with contact surface facing down.
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Remove spark plugs.
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Move piston for individual cylinder to Bottom Dead Center (BDC) position.
Note: Lightly tap valve lever to loosen stuck valve keepers.
Exhaust side
Note: Before attaching the adjustable rod, remove the two studs in the center of the cylinder head and the three upper studs (intake side) for mounting
the cylinder head cover.
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Install VW653/3 pressure hose together with seal hand tight into spark plug hole of relevant cylinder and apply constant pressure (at least 6 bar).
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Attach 2036 adjustable rod (as shown in figure) using M6 x 40 bolts with large washers.
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Remove valve spring using VW541/1 lever and VW541/5 valve spring tensioner.
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Remove valve spring and valve spring plate.
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Remove valve stem oil seal using 3047A slide hammer.
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Place plastic sleeve -A- on valve stem to prevent damage to new valve stem oil seals.
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Lightly lubricate sealing lip with oil.
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Insert valve stem oil seal -B- (without oiling outside of seal) into 3129 seal driver and carefully slide onto valve guide.
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When installing new valve, lightly oil valve stem before installing.
Intake side
Note: The intake valves are installed in the cylinder head at different angles.