I'm replacing the heater core on my 1987 XJ and I'm removing the 5 bolts that hold in the heater/ac module to the firewall. I have removed 3 but 2 of them are just rotate but don't come out.

The ones in question are the top one located behind the evaporator and the one located all the way to the right almost behind the engine. I think these are both the kinds with screw ends on both sides.

I spent probably 30-45 minutes trying to ratchet these off but they just keep going around but not coming out.

Any tips? Thanks!

 

It's prolly cross threaded.. I'm cheap so I would prolly try to keep pressure on the backside of it with a tool and try to unscrew it.. there's prolly a tool that makes getting the cross threaded bolts out but like I said I'm cheap haha.

 

well you could do like i did and forget the one behind the engine was still on there and just keep pulling till it rips out than cover the hole with metal tape

 

Grab the tip of the stud with some visegrips and loosen the nut with an open end wrench. Be careful not to bugger up the threads on the stud, once you get the nut to break loose it should just spin right off.

 

Problem is that some are stud and bolt and others are a bolt with a stud on each side and it is one piece. So I could break a nut loose or be trying in vain to break apart a one-piece unit.