Piston And Cylinder Bore, Checking

WARNING: This page is about a different variant/trim than selected.

Special tools and workshop equipment required

Pistons, Checking

Fig 1: Checking Piston Bore

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Measure approximately 10 mm in from the lower edge at a 90° angle to the piston pin axis using a micrometer.

Standard Dimension		Piston Diameter
in mm		82.42 ¹⁾
¹⁾ Measurements without graphite coating (thickness = 0.012 mm). The graphite coating wears off.

Special tools and workshop equipment required

Piston Ring Gap, Checking

Fig 2: Checking Piston Ring Gap

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Push the piston ring squarely from above down to approximately 15 mm from the edge of the cylinder. To push in use a piston without rings.

Cylinder Bore, Checking

Fig 3: Checking Cylinder Bore (Dimensions)

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

NOTE:

The cylinder bore must not be measured when the cylinder block is mounted on the : VAS6095A because the measurements may be incorrect.

Special tools and workshop equipment required

CAUTION:

Risk of damaging the cylinder bore surface through incorrect handling.

- Never handle the cylinder bore with service equipment (drilling, honing, grinding).

-- Using a : VAS6078 measure in a diagonal sequence at three positions transversely -A- and longitudinally -B-.

Standard Dimension		Cylinder Bore Diameter
in mm		82.51