Piston: Testing and Inspection

Piston position at TDC, checking

Special tools, testers and auxiliary items required





^ Measuring bar VW 382/7





^ Magnetic plate 50 mm dia. VW 385/17
^ Dial gauge

Work sequence





When installing new pistons or working with a partial motor, all of the pistons must be checked for piston position at TDC. Depending on the piston projection, install the corresponding cylinder head gasket according to the following table.

Note: To measure the piston position at TDC, turn the engine in a clockwise direction.





Cylinder head gasket identification





^ Replacement part No. = arrow 1
^ Control code = arrow 2 (ignore this!)
^ Holes = arrow 3

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