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Piston and cylinder dimensions > < Dismantling and assembling pistons and conrods

Golf Mk3

4-Cyl. diesel engine, Mechanics
Dismantling and assembling pistons and conrods
Checking piston projection at TDC

Special tools, workshop equipment, testers, measuring instruments and auxiliary items required

  • ◆ VW 382/7
  • ◆ VW 385/17

Test sequence
 
V13-0353

→ Piston projection at TDC must be measured when installing new pistons or a short engine. Depending upon piston projection, install the corresponding cylinder head gasket according to following table:

Engine codes 1Z, AHU, AEY, AFN, AFN, ALE

Piston projection

Identification
Holes/notches

0.91 mm ... 1.00 mm

1

1.01 mm ... 1.10 mm

2

1.11 mm ... 1.20 mm

3

Engine codes: 1Y, AAZ
 
V15-0262

Piston projection

Identification
Holes/notches

0.66 mm ... 0.86 mm

1

0.87 mm ... 0.90 mm

2

0.91 mm ... 1.02 mm

3

→ Cylinder head gasket identification

  • ◆ Part No. = black arrow
  • ◆ Holes/notches = white arrow

Note:

If differing figures are obtained when measuring piston projection, the highest figure should be taken when selecting the gasket.

Piston and cylinder dimensions > < Dismantling and assembling pistons and conrods