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The Suzuki Grand Vitaras 1999-2002 have a major design fault, more specially the J20 class engine.

The timing belt tensioners will fail eventually.. usually out of your waranty period.

The oil lubrication holes on these tensioners are not big enough and will block, even if you change the oil every 3000 miles.

The tensioner will develop a rattle, and eventually fail. The Suzuki engine is a interference engine, meaning the valves on the engine 'interfere' or move where the pistons in the engine move. If the timing chain fails, the piston will hit the valves, causing major engine damage.

Suzuki say you should never have to replace the timing chain system. This is wrong. Having talked to Suzuki, they have had these tensioners fail anywhere from 60000 km to 130,000 km. You will be up for a $2500 NZD job to replace the chain system and fix a problem that is a Suzuki design fault.

Suzuki knows about this problem as there is a service bulletin on this problem. However there is no recall or support outside the warranty period.

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Q: When do you replace the timing chain on a 2002 Suzuki Grand Vitara?
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