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Home >> Audi >> 2014 >> A5 Prestige >> Repair and Diagnosis >> External Pages >> Different car >> Section 6 (4.2L - Engine Mechanical, Engine Code(S): BHF) >> 15 - Engine - Cylinder head, Valvetrain >> Valvetrain, servicing >> Valve stem seals, replacing

Valve stem seals, replacing

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2009 Audi S4, 2008 Audi S4, 2007 Audi S4, 2006 Audi S4, and 2005 Audi S4. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Special Tools - Valve Stem Seals, Replacing
GW00018004Courtesy of VOLKSWAGEN UNITED STATES, INC.

Special tools, testers and auxiliary items required 

Work procedure 

Fig 2: Turning Roller Rocker Lever Upward And Securing With A Rubber Band
GW00018250Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig 3: Placing Guide Plate VAS 5161/7 From Valve Cotter Disassembly, Assembly Device VAS 5161 On Cylinder Head & Securing Guide Plate VAS 5161/7 With Knurled Screws VAS 5161/12
GW00018251Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
  • If guide plate cannot be installed, drill mounting bores to approx. 0.5 mm.
Fig 4: Installing Engaging Device VAS 5161/6 With Installation Forks VAS 5161/5 Into Guide Plate VAS 5161/7
GW00018252Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig 5: Identifying Valve Seal Removal Tool 3364
GW00008220Courtesy of VOLKSWAGEN UNITED STATES, INC.

Installing 

NOTE:
  • For pressing on valve stem seals from delivery program, the Valve Stem Seal Driver 3365 must be drilled to dia. of 10.5 mm.
Fig 6: Identifying Plastic Sleeve, Valve Stem Oil Seal & Valve Stem Seal Driver 3365
GW00008223Courtesy of VOLKSWAGEN UNITED STATES, INC.
Fig 7: Identifying Installation Cartridge VAS 5161/8
GW00008224Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
  • The large diameter of the valve keepers points upward.
Fig 8: Installing Engaging Device VAS 5161/6 With Installation Forks VAS 5161/5 Into Guide Plate VAS 5161/7
GW00018252Courtesy of VOLKSWAGEN UNITED STATES, INC.
NOTE:
  • After installing camshafts, do not crank engine for at least 30 minutes. The hydraulic equalization elements must seat themselves (otherwise valves will strike the pistons).
  • After working on the valvetrain and lifters, carefully rotate the crankshaft by hand at least 2 full revolutions before starting to be sure that valves do not strike the pistons.