Base Engine Misfire with Abnormal Valve Train Noise

WARNING: This page is about a different variant/trim than selected.

Cause	Correction
Worn or loose rocker arms The rocker arm bearing end caps and/or needle bearings should intact within the rocker arm assembly.	Replace the valve rocker arms as required.
Stuck valves Carbon buildup on the valve stem can cause the valve to not close properly.	Repair or replace as required.
Excessively worn or mis-aligned timing belt	Replace the timing belt and sprockets as required.
Worn camshaft lobes	Replace the camshaft and valve lash adjusters.
Sticking valve	Replace as required.
Worn or damaged pushrods	Inspect the pushrods for excessive wear, bent condition or broken tip. Replace as required.
Broken valve springs	Inspect valve springs and replace as required.
Excessive valve lash	Inspect the valve lash adjusters and replace as required.