Well .. if a cam has been degreed to suit driving style or transmission (getting the most power out of the range available) ... then the rocker cover has to at least come off.
Several people have had to have the engine opened ... mainly to get the rocker cover gasket or head gasket replaced ... not to have mods added too.
it's hard to put a demarcation point of the term "unopened" when it comes to mods really.
|