BMW Engine Camshaft Bolts Problem – Repair and Correction

By | January 10th, 2018|Case Studies|Comments Off on BMW Engine Camshaft Bolts Problem – Repair and Correction

What Happens
Certain late model BMWs can experience a problem with the camshaft sprocket retention bolts failing.
This is a design defect, and well know in professional BMW service circles.
You can see on the photo below, that VANOS (variable valve timing system) to intake camshaft bolts have broken and backed out, 3 of the 4 bolts are damaged and loose.

BMW said “in very rare cases the bolts holding the variable camshaft timing (Vanos) unit housing may become loose or, in extreme cases, break.” In such cases, the driver would be alerted by […]