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617.95x Timing Chain Tensioner
This is supposed to be changed every time the chain is replaced/removed.
1) Why spend $90 for the whole tensioner when a $3 spring will do the job?
2) If a $3 spring will do the job, why would anyone NOT do this?
Found this info regarding the tensioner;
Engine Failure On 1978-89 Mercedes Benz 3.0L Diesel Engines
The American Educational Research Association (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. The spring fatigues and breaks after the outside
diameter of the coil wire wears 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.
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83 300D 328k mi (623) Light Ivory - daily driver
82 300D 166k mi (881) Thisle Green - fixer upper
82 300D 282k mi (473) Champagne - parts
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