Piston Projection, Measuring At TDC

WARNING: This page is about a different car, the 2015 Volkswagen Beetle. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Check the piston projection at "TDC" whenever installing a new piston or new partial engine.

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

Depending on the piston projection, install the cylinder head seal according to the following table.

Special tools and workshop equipment required

Measuring bar VW382/7 from the Special Socket & Measuring ToolsVW382
Measuring Set - Magnetic Plate - 50 mmVW385/17 from Measuring SetVW385
Dial Gauge - 0-10 mmVAS6079

Procedure

Fig 1: Identifying Measuring Bar VW 382/7 And VW 385/17 On Cylinder Block

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Secure the Dial Gauge - 0-10 mmVAS6079 with the measuring bar VW382/7 and magnetic plate VW385/17 to the cylinder block, as illustrated.

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

-- Depending on the piston projection, install the correct cylinder head seal 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 Seal Identification

Fig 2: Identifying Cylinder Head Seal Identification

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

Part Number
Ignore
Holes

NOTE:

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