Workshop Manuals Factory service & repair Alfa Romeo
Alfa Romeo 145/146 Engines, 146 Bodywork and Engine Overhaul Manual (1994-2001)14 · Engine overhaul: 2.0 V6 Turbo (AR16202)
14 · Engine

Valves

Make
Alfa Romeo
Model
145/146 Engines, 146 Bodywork and Engine Overhaul Manual
Year
1994–2001
Section
Overhauling › Valves
Engine overhaul: 2.0 V6 Turbo (AR16202)Valves
  1. Ream the new valve guides (intake and exhaust) by means of a suitable reamer (diameter 9 mm H7) to calibrate the bores to the specified value
Illustration showing a hand using a reamer tool inside an engine cylinder head, with valve guides visible.
Valve guide inner diameter
intake and exhaust 9,000 ÷ 9,015 mm
Illustration showing a valve stem being inserted into a valve guide, with a tool labeled '1' holding it in place.

VALVES

  1. Check that the valve stem and head diameters range within the specified values
Diagram of a valve showing its stem and head, with labeled dimensions 'B' for the head diameter and '1' for the stem.
Valve «A» stem diameter
intake 8,972 ÷ 8,987 mm
exhaust 8,940 ÷ 8,955 mm
Valve «B» head diameter
intake 36,35 ÷ 36,5 mm
exhaust 32,45 ÷ 32,6 mm

VALVE SEAT TURNING

  1. If necessary, carry out the valve seat turning by using suitable tools

NOTE: The taper “C” is obtained with the tool of the portable lathe at 45°

Illustration showing a hand operating a tool on a valve seat, with an angle marked as 45° and part labeled '1'.

Parts & tools for this job For 1994 Alfa Romeo 145/146

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