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Home >> Volkswagen >> 2018 >> Beetle S, 2D Hatchback >> Repair and Diagnosis >> External Pages >> Different car >> Section 108 (2.0L - Crankshaft Drive - Engine Code(S): CJAA & CVCA (Convertible)) >> 13 Crankshaft Drive >> Diagnosis And Testing >> Piston Projection, Measuring At TDC >> Test Sequence

Test Sequence

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-- Mount the Dial Gauge VAS 6079 together with the measuring bar VW 382/7 and the 50 mm magnetic plate VW 385/17 to the cylinder block as shown.

-- Measure the projection on each piston at both spots identified with -arrows- (at the front and back of the piston).

Fig 1: Identifying Measuring Bar VW 382/7 And VW 385/17 On Cylinder Block
GWWA13-10694Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

When installing new pistons or working with a partial engine, check the piston projection in "TDC" on all pistons. Depending on the piston projection, install the corresponding cylinder head gasket according to the following table.

NOTE:

Turn to engine clockwise in order to measure the piston position at "TDC".

If varying values occur when measuring the projection, use the gasket for the largest value.

Piston projection Identification Notches/Holes
0.91 to 1.00 mm 1
1.01 to 1.10 mm 2
1.11 to 1.20 mm 3