4. INSPECT CAMSHAFT HOUSINGS FOR FLATNESS Using a precision straight edge and feeler gauge, check the surfaces contacting the cylinder head for warpage. Maximum cylinder head surface warpage: 0.10 mm (0.0039 in.) If warpage is greater than maximum, replace the housing. REPLACEMENT OF CAMSHAFT HOUSING OIL SEAL NOTE: There are two ways of oil seal replacement. 1. IF CAMSHAFT IS REMOVED FROM CAMSHAFT HOUSING: (a) Remove the oil seal from the camshaft housing. • Using a screwdriver, pry out the oil seal. (b) Install the new oil seal on the camshaft housing. • Apply MP grease to the oil seal. • Using SST, install the new oil seal. SST 09214-60010 2. IF CAMSHAFT HOUSING IS INSTALLED ON CYLINDER HEAD: (a) Cut the oil seal. • As shown in the figure, cut off the oil seal lips. (b) Remove the oil seals. • Using a screwdriver, pry out the oil seal. NOTE: Be careful not to damage the camshaft. Tape the screwdriver. (c) Inspect the camshaft. • Check the contact surface of camshaft oil seal lip for cracks or damage.