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Inspecting the valve sealings
- Fit the valves into the cylinder head.
- Alternatively test the intake and outlet valves.
- This test should be carried out by filling the mani-
fold with petrol and checking that the head does
not excessively ooze through the valves.
Inspecting the valve housings
- Check the width of the mark on the seat of valve
«V". Max. wear: 1.6 mm.
- Remove any carbon deposits from the valve
- Measure the inside diameter of each valve guide.
- Measure according to the rocker thrust direction
at three different heights.
- If the width of the mark on the valve seat or the
diameter of the valve guide exceed the specified
limits, replace the cylinder head.
Valve seat wear: Intake guide
admissible limit: 5.022
Valve seat wear: Intake guide
Standard diameter: 5.000 ÷ 5.012 mm
Valve seat wear: Outlet guide
Admissible limit: 5.022
ENG - 117


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