C. Hydraulic Lash Adjuster (Hla) Noise

A noise heard from the top of the engine area which can be described as a "ticking" or "clattering" type noise at various engine temperatures. The noise level varies depending on the number of HLA's that are making the noise. HLA noise can occur due to internal failure of the HLA, air trapped in the lubrication system, or low oil pressure. Verify the concern by:

1. Check oil and filter condition. Check for proper engine oil level. In many cases a simple oil (Motorcraft 5W30) and filter (Motorcraft FL-822) change may eliminate the noise concern. If after changing the oil and filter, the noise is still present, proceed to Step 2.

NOTE:
SOME HLA NOISE WHEN THE ENGINE IS COLD AND FIRST STARTED IS NORMAL. THE LENGTH OF TIME THE HLA NOISE LASTS WILL VARY DEPENDING ON AMOUNT OF TIME THE VEHICLE HAS BEEN SITTING OR IN STORAGE.








2. Refer to HLA Noise Diagnostic Flowchart (Figure 6, which includes a reference to Figure 7) for repair recommendations.