Piston Projection, Measuring At TDC

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Special tools and workshop equipment required

Measuring Bar :VW 382/7

Fig 1: Identifying Measuring Bar VW 382/7
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Measuring Set - Magnetic Plate - 50mm :VW 385/17 from Measuring Set :VW 385

Fig 2: Identifying Measuring Set - Magnetic Plate - 50 mm VW 385/17
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Dial Indicator - 0-10mm :VAS 6079

Fig 3: Dial Gauge
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Procedure

Fig 4: Identifying Measuring Bar VW 382/7 And VW 385/17 On Cylinder Block

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-- Secure the Dial Gauge - 0-10mm :VAS 6079 with the Measuring Bar :VW 382/7 and Measuring Set - Magnetic Plate - 50mm :VW 385/17 to the cylinder block, as shown.

-- Measure the projecting end on each piston at both spots identified with -arrows- (longitudinally on the engine: at the front and back of the piston).

-- Depending on the piston projection, install the corresponding cylinder head gasket according to the following table:

Piston projection above the upper edge of the cylinder block mm	Identification holes
0.91 to 1.00	1
1.01 to 1.10	2
1.11 to 1.20	3

Cylinder Head Gasket Identification

Fig 5: Head Gasket

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Part Number
Ignore
Holes

TIP:

If varying values occur when measuring the projecting end, use the cylinder head gasket for the largest value.