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Head unit: valves - rocker arms
Checking the valve
Check that the stem and the surface that contacts the valve seat are in good condition. There must be no pitting,
cracks, deformations or signs of wear.
Check the following: measure the diameter of the stem (B) at various positions along the portion that runs in the
valve guide.
Check the valve stem for buckling. Place valve on a
“
V
”
block, set a dial gauge perpendicular to head and measure
run-out of valve face slanted at 45°.
- Service limit:
0.03
mm
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