Timing Chain Rattling Noise On 1999-2002
Suzuki 2.5L H25 Engines
The AERA Technical Committee offers the following information regarding a timing
chain rattling noise on 1999-2002 Suzuki 2.5L & 2.7L engines. This noise comes from the
front of the engine, behind the timing cover, and is normally heard the loudest when the
engine is cold. Vehicles affected are the Grand Vitara & XL-7.
There are three timing chain tensioners on this engine, and causing this problem is the
number 1 timing chain tensioner that is not properly adjusted. In order to fix the problem,
Suzuki recommends replacement of the number 1 tensioner only.
If there is a tensioner noise for the first 5 seconds of engine operation, Suzuki considers this acceptable under
normal engine operation.