| Mercedes Engine >> ENGINE FAILURE |
Engine Failure On 1978-89 Mercedes Benz 3.0L Diesel Engines
The AERA Technical Committee offers the following information regarding engine failure on 1978-89 Mercedes Benz 3.0L diesel engines. This failure has been reported on vehicles with high mileage or shortly after a partial engine repair.
The damage reported has ranged from lack of compression to catastrophic component failures. The cause of these failures has been related to a lack of tension on the engine?s timing chain, allowing piston to valve contact. The reason for insufficient tension on the timing chain is a broken chain tensioner spring. See Figure 1 below to view one such spring that broke shortly after the cylinder head and tensioner were re-installed. The spring fatigued and broke after the outside diameter of the coil wire had worn excessively.
The timing chain tensioner requires removal and re-installation anytime the cylinder head is removed. It is therefore advised to replace this spring, Part # A1109933901 anytime the tensioner is removed.
The AERA Technical Committee
Looking for replacement Mercedes engines? Visit our online Rebuilt Engines Store.
Need to fix your Mercedes engine? Access here the comprehensive online repair guide for your Mercedes engine.
Click Here to find a used Mercedes engine.
|
|
