Technical data

118
INSPECTING THE VALVE SEALINGS
- Insert the valves into the head.
- Alternately test the intake and exhaust valves.
- The test should be carried out by filling the manifold with
fuel and checking that the head does not bleed from the
valves, when pressed by your fingers only.
INSPECTING THE VALVE HOUSINGS
- Check the width of the impression on the valve seat «V»;
max wear limit 1.6 mm.
- Clean the valve guides of any carbon residues.
- Measure the inside diameter of each valve guide.
- Measure according to the rocker thrust direction at three
different heights.
- If the valve seat impression width or the valve,guide diame-
ter are larger than the prescribed values, replace the head.
Characteristic
Wear of valve seats: Intake guide
Admissible limit:
5,022
Wear of valve seats: Intake guide
Standard diameter:
5,000 ÷ 5,012 mm
Wear of valve seats: Exhaust guide
Admissible limit
5,022
Wear of valve seats: Exhaust guide
‘Standard diameter:
5,000 ÷ 5,012 mm
INSPECTING THE VALVE SEALINGS
SC G OUS GS