Ok ,the heater core on my 2002 jeep wrangler is bad ,will be replacing this week end ,the question is what are the do's and don'ts of this,i know it's a pain in the rear.just looking for any tricks or ideas to make it go a little better .whats the average time to remove and install ,thanks.this jeep will be almost new when done.new front end parts ,rearend ,drive shaft joints ,plugs ,belt,battery,brakes ,exhaust,stereo,serviced trans and case.any way thanks to all for the help,hope every one has a good year.