Workshop Manuals Factory service & repair Alfa Romeo
Alfa Romeo 155 Factory Service Manual (1992-1998)03 · Engine – mechanical (Twin Spark)
03 · Engine

Checking valve leakage (page 2 of 2)

Make
Alfa Romeo
Model
155 Factory Service Manual
Year
1992–1998
Section
Indications for reassembly
Engine – mechanical (Twin Spark)Checking valve leakage · page 2 of 2

1 Check that the clearance between the cam heel radius and corresponding valve cup is within the prescribed limits, otherwise replace the intake valve caps with others of a suitable thickness.

Intake side valve clearance
0.380 to 0.450 mm
Engine main mechanical unit diagram showing camshaft and valve caps with torque specification box
20 ÷ 22 Nm
2.04 ÷ 2.24 kgm

1.825.018.000
(C.6.0197)

Engine main mechanical unit diagram showing camshaft and valve caps with torque specification box
  • Unlock and remove the intake side camshaft cap nuts
  • Tighten the lubricated exhaust side cap nuts to the correct torque.
  1. Check that the clearance between the cam heel radius and corresponding cup is within the prescribed limits, otherwise replace the exhaust valve caps with others of a suitable thickness.
Exhaust side valve clearance
0.430 to 0.500 mm
Engine main mechanical unit diagram showing camshaft and valve caps with torque specification box

1.825.018.000
(C.6.0197)

Engine main mechanical unit diagram showing camshaft and valve caps with torque specification box
Engine main mechanical unit diagram showing camshaft and valve caps with torque specification box

Parts & tools for this job For 1992 Alfa Romeo 155

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