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Home >> Audi >> 1993 >> V8 Quattro V8-4.2L (ABH) >> Repair and Diagnosis >> Specifications >> Mechanical Specifications >> Engine >> Cylinder Head Assembly >> Valve, Intake/Exhaust
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Valve, Intake/Exhaust

Valve Installed Height [01] [06]
Valve Face Angle Degrees [02] 45
Valve Clearance
Intake [05]
Exhaust [05]

[01] -- Measured from top of valve stem to top of cylinder head.
[02] -- Do not reface valves, only lapping is permitted.
[05] -- Equipped with hydraulic valve lash adjusters.
[06] -- Intake, 1.40 inch] exhaust, 1.47 inch.


Cylinder Head
Warpage Limit 0.004
Valve Stem To Guide Clearance
Intake 040 [01]
Exhaust 050 [01]
Valve Seats
Seat Angle Degrees 45
Seat Width
Intake 060 - .070
Exhaust 0.07

[01] -- Wear limit.
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