Timing chain tensioner: common defects and their signs

1. Abrasion of the push rod or gear teeth
   • Metallic rattle appears when the engine is working.
   • The timing chain is slacking significantly.
   • Timing chain wears out faster.
2. Mechanism jamming
   • Unstable engine work at idle is noticeable.
   • The engine loses power.
   • Sudden engine stop can take place.

How to replace a timing chain tensioner?

The timing chain tensioner serves for 200 000 - 250 000 operational kilometers approximately. After expiration of the specified term a new carpart is installed because the worn-out one can not be repaired. Pulleys and the chain itself have to be replaced together with the tensioner. Late replacement of timing drive elements can be the cause of significant engine damages.

Professional equipment is required to perform replacement of the timing mechanism components on a car. Moreover, special skills are necessary. The algorithm of new chain tensioner installation depends on complexity of access to it, the car drive type and the component type as well. That is why it is recommended to visit a service station. To gain access to the component specialists will demount the auxiliary equipment, or the whole tensioner mechanism if necessary. Moreover, the crankshaft pulley needs to be removed. Installation of a new tensioner is performed together with a gasket. During installation it is very important to observe the tightening torque specified by the car manufacturer. After a new element is installed, adjustment of the crankshaft position is performed.