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Checking compression pressures > < Removing

Leon Mk2

Installing
Installing
  Note!
t  There must be no oil or coolant in the cylinder head bolt pockets in the cylinder head.
t  Only remove the new cylinder head gasket from its packing immediately before installing.
t  Handle the new gasket with extreme care. Damaging will lead to leaks.
–  Place a clean cloth in cylinders so that no dirt or emery cloth particles can get in between cylinder wall and piston.
–  Also prevent dirt and emery cloth particles from getting into the coolant.
–  Carefully clean cylinder head and cylinder block sealing surfaces. Thereby ensuring that no scoring or scratches are formed (when using abrasive paper the grade must not be less than 100).
–  Carefully remove metal particles, emery remains and cloths.
   
–  Turn crankshaft to TDC No. 1 cylinder.
–  Turn crankshaft back slightly.
  A13-0076
–  Loosen the bolts -1- and -2- on turbocharger bracket approx. 2 turns, this will prevent stress when installing the cylinder head.
–  Fit new cylinder head gasket. Lettering (Part No.) must be readable from the intake side.
  A21-0024
–  Note centralizing pins -arrows- in cylinder head.
–  Fit cylinder head.
  A15-0135
–  Tighten cylinder head in tightening sequence as follows:
–  Pretighten all bolts to 40 Nm.
–  Then tighten all bolts a 1/4 turn (90°) further using a rigid wrench.
–  Then tighten all bolts again a 1/4 turn (90°) further.
  Note!
There is no requirement to retighten the cylinder head bolts after repairs.
–  Renew gasket between turbocharger/exhaust manifold and securely tighten the turbocharger and it's bracket to the cylinder block.
–  Install toothed belt and set timing → Chapter.
Filling with new coolantn → Chapter.
The rest of the assembly is basically a reverse of the dismantling sequence.
–  Read fault memories of all control units → Diagnostics operations unitVAS 5051.
–  Carry out test drive and read fault memories of all control units again.
  A15-0023

Checking compression pressures > < Removing