Checking piston projection at TDC

Special tools and workshop equipment required

Measuring tool -VW 382/7-

Measuring plate -VW 385/17-

Test sequence

Piston projection at TDC must be measured when installing new pistons or a short engine.

Depending on piston projection, fit the appropriate cylinder head gasket from the following table.

If the measured values for piston projection are not the same for all pistons, use the highest value to determine the correct gasket size.

Cylinder head gasket must be determined separately for each cylinder bank.

Measure piston projection at two points -1- for each piston using measuring tool -VW 382/7- and measuring plate -VW 385/17-.

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Piston projection above top surface of cylinder block

Identification (No. of holes)

0.39 mm 0.49 mm 1

0.49 mm 0.54 mm 2

0.54 mm 0.65 mm 3

Cylinder head gasket identification

-Arrow 1- = holes

-Arrow 2- = Part No.

-Arrow 3- = production control code (can be disregarded)

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