Engine - Hydraulic Lash Adjuster Noises

SOURCE: Kia Technician Times

TITLE: HLA Noise

APPLIES TO: Sephia
Sportage

SERVICE TIP:

CONDITION

Some vehicles have experienced excessive HLA noise (clatter) at engine start-up.

CAUSE

Air becomes trapped inside the HLA (aeration) and causes excessive clatter. Prior to replacing any HLAs, perform the following de-aeration procedure.

CORRECTIVE ACTION

1. Warm-up the engine to normal operating temperature.
2. Run the engine at the specified RPM's for the specified length of time.
Sephia: 4000 RPM for 5 minutes
Sportage: 3000 RPM for 10 minutes
3. Verify that HLA noise is no longer present.