Remove relevant camshaft sprocket - see operation "Camshaft Sprockets, Remove and Install". Edge out seal ring (1) from camshaft bearing cap with suitable tool - ensure that sealing surfaces are not damaged.
 Clean Clean sealing surfaces of camshaft and camshaft bearing caps.
 Install, Connect Lightly coat sealing lip of new seal ring with silicone grease (white) and press into camshaft bearing cap with KM-422 (2) - use fastening bolt and washer of camshaft pulley. Install camshaft sprocket - see operation "Camshaft Sprockets, Remove and Install". | 
Remove, Disconnect 