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Valve clearance is not an issue with big-block VW engines (1.6L > 2.0L) as they employ overhead camshafts with hydraulic lifters (tappets). The lifters are self adjusting and maintenance-free, so there is no adjustment for valve clearance.

Tapping/rattling noises coming from the cylinder head generally result from a sticking lifter or excess valve-guide wear.

Lifters are not expensive and can be replaced with the cylinder head left in situ. It is also possible to strip, clean and rebuild lifters with little more than carbon-removing oven cleaner and a little patience.

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15y ago

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