Surface Flatness

1. Inspect the desk surface for flatness. Use a straight edge and a feeler gauge. The flatness specification is a maximum of 0.076 mm (0.003 inch) overall.
2. Replace the block if the flatness measurement is more than 0.25 mm (0.010 inch). Minor irregularities may be carefully machined.
3. Inspect the oil pan rail and the timing cover attaching area for nicks. Minor irregularities may be cleaned up with a flat mill file.

CAUTION: A broken flex plate may result if the transmission case mating surface is not flat.

4. Inspect the transmission case mating surface.
5. Temporarily install the crankshaft.