Suzuki Engine >> TIMING CHAIN RATTL;ING NOISE ON 2.5L SUZUKI ENGINES

Suzuki Engine >> TIMING CHAIN RATTL;ING NOISE ON 2.5L SUZUKI ENGINES

Timing Chain Rattling Noise On
1999-2002 Suzuki 2.5L Engines

The AERA Technical Committee offers the following information regarding a timing chain rattling noise on 1999-2002 Suzuki 2.5L 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 that are affected are the Grand Vitara & XL-7.
There are 3 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 this problem, Suzuki recommends replacement of the number 1 tensioner only as shown in the Figure 1 below. The new tensioner is being offered under Part #12831-85FA7. If there is a tensioner noise for the first 5 seconds of engine operation, Suzuki considers this normal under engine operation.

After installation of the tensioner, properly clean the sealing surface on the timing chain cover, crankcase, cylinder block and cylinder heads for installation. Apply sealant ?A" Suzuki Bond 1207F (Part #99000-31250) to the timing chain cover sealing surface as shown in Figure 2. Apply sealant ?B" Suzuki Bond 1207B (Part #99104-31140) to the mating surface of the cylinder block and head. Use a plastic scraper as a jig to force the sealer into the air gap formed between the cylinder block, head and head gasket as shown in Figure 2A.

NOTE: Failure to perform this step will result in an oil seepage that will migrate down the front of the block and be diagnosed as a crankshaft seal leak.

The AERA Technical Committee

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