Chapter 7 – Cylinder head and valves
Manual de Oficina AJP PR3/PR4 (2015) 7 - 8
Inspect the gear teeth of the camshaft and the
gear on the crankshaft for wear or damage.
Inspect the timing chain links and both chain
guides.
The timing chain should be replaced
whenever it shows excessive wear, trapped
links in joints or any other abnormal damage.
Note:
Where the timing chain is replaced, it is
recommended that the rack camshaft also be.
Also inspect the teeth of the pinion gear on
the crankshaft for wear or damage.
Cylinder head
Clean the cylinder head, removing possible
carbon deposits from the combustion
chamber.
Note:
Be careful not to damage the valve seat
or even the sealing gasket seating faces.
Inspect the spark plug hole and the area of
the valves on the existence of damage.
Check if the valves nicely slide on the guides
into the holes in the cylinder head without any
obstruction.
Inspect the cylinder head about their warpage
using a ruler of precision and feeler gauge
between the bolt holes in the cylinder head.