The timing bell and camshaft sprocket(s) should be removed. The inner timing belt covers need to be unbolted and removed so that the camshaft seals can be accessed. To put in a new seal at the same place as the old one, note how deep it is from where the
Cylinder Head ends to its face before getting rid of it. Use a skin pulling device in order to take out any remaining sealants fixed on top of the cam heads. In order to make a substitution for this critical part, use a deep socket along with light tapping while placing it inside the cylinder head housing. Pushing through evenly until you get back at which point the original seal was mounted, is how we are supposed to fix it squarely. The rest of installation is the reversal of removal.