Hydraulic Lifter Diagnostic Chart
WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
After cylinder block, head or lifter replacement, it will be necessary to allow the engine to idle for three to five minutes. If lifters are noisy, warm the engine up at a low RPM (less than 2000). After the coolant temperature has reached approximately 85°C (185°F), cycle the engine RPM from idle to 3000 for approximately 10 minutes or drive the vehicle 8 km (5 mi.) to purge the air. If the air cannot be purged, the faulty lifter(s) will have to be replaced.
Lifters that are pumped up may cause PCM misfire codes to set. Continue to operate the engine until the lifters bleed down. Using a scan tool, clear codes and malfunction history.
NOTE:
A noisy lifter or belt tensioner can cause the knock sensor to retard spark timing, reducing vehicle performance and fuel economy.