Checking Cylinder Head For Distortion, Extent Of Rework And Sealant Application

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Check cylinder head for distortion using a commercially available straight-edge -1- and feeler gauge.
> Control value 0.1 mm

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Cylinder head, straight-edge and feeler gauge
Reworking of the cylinder head (grinding down) is only permitted as far as the minimum dimension -a- .
> Control value 138 mm +/- 0.1 mm

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Extent of rework on cylinder head
Applying sealant on cylinder bank 1 and cylinder bank 2
1. 3.1 Apply beads of sealant -1, 2- as shown to the clean sealing surfaces of the cylinder block and lower timing chain cover.
2. 3.2 Sealant bead thickness: 2 mm.
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Applying sealant to cylinder bank 1