Excessive valve lash can indicate a worn valve stem or rocker lever.
Loose rocker levers and the need to re-set the valve clearance frequently, can also indicate camshaft lobe or tappetwear. If an inspection of the levers, valve stems and push rods does not show wear, then tappet and/or camshaft
lobe wear can be suspected.
Caution: Anytime a new camshaft is installed, new tappets must also be installed.
The camshaft lobes can be visually inspected after removing the lubricating oil pan. Similarly, the face of the
tappet can be inspected after removing the push rods and lifting the tappet.
A severely damaged camshaft journals) can generate metal chips which will be found in the lubricating oil pan
and lubricating oil filter. As the clearance between the bushing(s) and journals) increases, a small decrease in
lubricating oil pressure may be detected.
