Workshop Manuals Factory service & repair Alfa Romeo
Alfa Romeo 145/146 Engines, 146 Bodywork and Engine Overhaul Manual (1994-2001)13 · Engine overhaul: 3.0 V6 24V (AR16102)
13 · Engine

Checking valve springs

Make
Alfa Romeo
Model
145/146 Engines, 146 Bodywork and Engine Overhaul Manual
Year
1994–2001
Section
Overhauling › Checking valve springs
Engine overhaul: 3.0 V6 24V (AR16102)Checking valve springs
  • Bore the inside diameter of the valve guide to calibrate the holes to the specified diameter.
Valve guide inside diameter measurement with gauge tool

CHECKING VALVE SPRINGS

  • Check that the "free" length of the valve springs is within the specified limits.

NOTE: The rest planes must be parallel with one another and at right angles to the axis of the spring with a maximum error of 2°.

Free length of valve springs measurement
  1. Using a torque meter, check that the spring specifications are within the specified limits.
Torque meter setup for testing valve springs

CHECKING THE CLEARANCE BETWEEN HYDRAULIC TAPPETS AND THEIR SEATS

  1. Check that the diameter of the hydraulic tappet seats is within the specified limits.
Diameter
  1. Check that the outside diameter of the hydraulic tappets is within the specified limits.
Diameter of hydraulic tappets measurement with caliper tool
  • Calculate the clearance between the hydraulic tappets and their seats checking that it is within the specified limits.
Clearance between hydraulic tappets and their seats measurement

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

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