Cylinder Block Assembly: Testing and Inspection

Piston Projection in TDC, Checking

=> [ Cylinder Head Gasket Identification ]

Special tools, testers and auxiliary items required

• Measuring Bar (VW 382/7)

• Magnetic Plate 50 mm Dia. (VW 385/17)

• Dial Gauge 0-10 mm (VAS 6079)

Test Sequence

- Install the dial gauge 0-10 mm (VAS 6079) together with the measuring bar (VW 382/7) and the magnetic plate 50 mm dia. (VW 385/17) to the cylinder block as illustrated.

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






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

• Turn the engine clockwise in order to measure the piston projection at TDC.

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






Cylinder Head Gasket Identification






• Part number - arrow 1 -

• Holes - arrow 2 -

• Control code - arrow 3 - (ignore this!)

• Depending on the piston projection, varying cylinder head gasket thicknesses can be installed. Be sure to use a gasket having the identical identification when replacing.

• Determine the piston projection at TDC when installing new pistons or a partial engine. Refer to => [ Piston Projection in TDC, Checking ] Testing and Inspection.