Mack valve lash adjust

[MechanicMaster]

Is anyone know how to adjust valve on a Mack e-tech 12 liters 2003? Thanks to reply.

[Texas149]

On an E-tech Mack engine you set the valves in firing order, both intake and exhaust at the same time for that cylinder. Remove the bottom cover on the flywheel housing. The flywheel is scribed on the outer face as follows: Valves I 1-6, Valves I 2-5, Valves I 3-4.....Theres should be a pointer inside the housing if not already broke off. Just align the line between the word valves and the number with the pointer and thats where you set it. Example like above: Valves (I) 1-6, in parenthesis is the timing mark. You can start anywhere just follow firing order 1-5-3-6-2-4

[hercamp]

maybe this help too.