TSB Document:

Affected Component: ENGINE AND ENGINE COOLING

Summary
Some vehicle may exhibit a tapping noise from the engine during idling; etc., and synchronized to the engine rpm. The tapping noise may be caused by the switchable hydraulic lash adjuster (HLA), which may not work properly due to air bubbles accumulated in the oil passage in it.

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Date Published
NOV 04, 2020
NHTSA TSB #
10183589
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