9-3 Hatchback (9400) L4-2.0L Turbo (B205) (2000)
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If a knocking noise can be heard from the lower end of the engine then this indicates noise from the bearings.
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If any of the above noises can be heard, proceed to step 5.
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If noise is coming from the timing chain or balancer shaft chain, continue with step 4.
4.
Checking wear on timing and balancer shaft chains:
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Remove the small hex bolt from the end of the tensioner so that the piston does not protrude further when the tensioner is removed. See WIS -
Engine - Basic engine 4-cyl (petrol) - Adjustment/Replacement - Chain tensioner, timing chain.
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Remove the tensioner from the cylinder block and measure the length, see illustration.
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If the piston in the tensioner protrudes less than 15 mm, continue with step 5.
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If the tensioner piston protrudes more than 15 mm, then both the timing and balancer shaft chains must be replaced.
Note