Originally Posted by mkaake
i'd say go ahead and read the post i just bumped back up to the top about upper intake failure info. its a good read and will get you the basic info about what'* actually going on in your motor.
aside from that, as i mentioned in your q about removing the beaut cover, i'd be more worried about my lower intake gaskets than the upper, but that'* just me...
YES!! The lowers are the place you should be focusing.
Alos, like Will said...there are no confirmed cases of the 99 upper intakes melting, however, the 99s are not exempt from the poor quality lower gaskets.