Engine Block Deck Flatness Inspection
Ensure the engine block decks are clean and free of gasket material.
- Inspect the surface for any imperfections or scratches that could inhibit proper cylinder head gasket sealing.
- Place a straight-edge (1) diagonally across the engine block deck face surface.
- Measure the clearance between the straight-edge (1) and the engine block deck face using a feeler gauge (2) at 4 points along the straight-edge.
- If the warpage is less than 0.10 mm (0.004 in), the engine block deck surface does not require resurfacing.
- If the warpage is between 0.10 - 0.20 mm (0.004 - 0.008 in) or any imperfections or scratches that could inhibit proper cylinder head gasket sealing are present, the engine block deck surface requires resurfacing.
- If resurfacing is required the maximum amount that can be removed is 0.25 mm (0.010 in).
- If the engine block deck surface requires more than 0.25 mm (0.010 in) material removal the block must be replaced.