10 Jan, 2018

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 […]

22 Dec, 2015

Mini Cooper – Engine Problem – Carbon Deposits On Intake Valves

By | December 22nd, 2015|Case Studies|Comments Off on Mini Cooper – Engine Problem – Carbon Deposits On Intake Valves

Problem occurs with both "S" and non "S" models Problem occurs with both “S” and non “S” models

Carbon Deposits On Intake Valves
As the largest Mini Cooper service specialists in Maine, at the Atlantic Motorcar Center we’ve noted a significant increase in late model Mini Coopers with cold start or cold running problems, even to the point of stalling, or Check Engine warning lights coming on.

We’ve found that many of these Mini Cooper direct injection engines suffer from an excessive carbon build up on the back of the engine intake valves.  The carbon build up […]