Can I do any prev. maint. on the car?? it still has the orig. Timing belt but the belt tensioner was replaced at 133k.. I just replaced the micron and air filters.. the only prob i have is the close assist pump.. can I attempt on rebuilding this unit??? anyone have instruction on how to remove it and where it is located?? I recently replaced the blower control regulator but when i put the control to high the fan works at a high speed but i do not get the amount of air that I intend on blowing out at that speed .. what could be wrong???