The housing postioned in the essential tool mounted gently in a vice
[You must be registered and logged in to see this image.]The securing ring removed anticlockwise with half inch drive ratchet.
[You must be registered and logged in to see this image.]Housing cap now lifted off
[You must be registered and logged in to see this image.]Filter rotate and pull to remove
[You must be registered and logged in to see this image.]New filter insert and rotate anticlockwise
[You must be registered and logged in to see this image.]Seal shown hanging
[You must be registered and logged in to see this image.]Position seal
[You must be registered and logged in to see this image.]Replace top cap with respect to correct position of inlet outlet, taking a photo or marking postion before dismantling is a good idea
refit securing ring and assembly tool and tighten to 30nm.
The tool ensures the casing is protected from crushing or overtightening as it will distort rather than accept more torque.
Tool document
[You must be registered and logged in to see this link.]Can be sourced for sub £18 delivered
It is inconceivable that the housing can be damaged and leak if this tool is used.