Posted on 6/17/2019
This 2009 Mercedes-Benz SL, AMG, is undergoing an extensive repair due to damaged head bolts. This is a fairly common issue with the Mercedes-Benz "63" M156 big block 6.2 liter engine (See below for list of vehicles this engine is used in). Symptoms of the head bolt failure include engine misfiring and unexplained coolant loss. Most often a check engine warning light will show on your dash display, in this case, we offer a free "engine light" check service to begin to identify if this is the issue. If these symptoms are ignored, the issue will quickly begin to cause serious damage to other engine components. The repair procedure is to replace the broken head bolts with an upgraded, heavy duty head bolt. This process requires removal of the cylinder heads and replacement of the cylinder head gaskets (as well as other necessary gaskets) as seen in the next few images below. Shown above the ca ... read more