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Home >> Volkswagen >> 1997 >> Cabrio Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (1.9L TDI Engine Mechanical - AAZ, 1Z, AHU (A3 Platform)) >> Engine - Crankshaft, Cylinder Block >> Pistons and connecting rods, disassembling and assembling >> Piston position at TDC, checking >> Test sequence

Test sequence

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Piston position at TDC must be measured whenever new pistons or a short block is installed. Depending on piston position at TDC, install correct gasket using the following table:

Fig 1: Checking Piston Position At TDC
G03256966
PISTON POSITION AT TDC (AAZ)

Piston height above cylinder block (TDC) Cylinder head gasket notches/holes
0.66-0.86 mm (0.0260-0.0339 in.) 1
0.87-0.90 mm (0.0343-0.0354 in.) 2
0.91-1.02 mm (0.0358-0.0402 in.) 3
PISTON POSITION AT TDC (1Z & AHU)

Piston height above cylinder block (TDC) Cylinder head gasket notches/holes
0.91-1.00 mm (0.0358-0.0394 in.) 1
1.01-1.10 mm (0.0398-0.0433 in.) 2
1.11-1.20 mm (0.0437-0.0472 in.) 3
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