Piston And Cylinder Bore, Checking: Notes

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

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Measure approximately 15 mm from the lower edge at a 90° angle to the piston pin axis using a 75 to 100 mm external micrometer.

Maximum variance from the specified size: 0.04 mm.

NOTE:

Check for wear on the piston shaft-coating and general coking.

The piston must be replaced if cracks have formed on the piston shaft.

Piston Diameter In mm
Specified size	80.92 ¹⁾
¹⁾ Measurement with coating (thickness = 0.02 mm). The coating wears off.

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

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

Maximum deviation from the nominal dimension: 0.10 mm.

NOTE:

Pay attention to scratches and other abnormalities on the cylinder wall.

Cylinder Bore Diameter In mm
Specified size	81.03

NOTE:

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