Three week ago I replace the radiator cap on my 02 jeep liberty, which lead to a few problems with coolant system, replace the cap cause a patch on coolant tank to blow out (around hose on top) which intern cause antifreeze to flow on to #4 & 6 plugs ( coil pack) cause it to misfire n run like crap, pull coil pack and plugs, and found silicone around the base of coil, figure since I had it apart I my as well put new plugs in, after pulling all six of the plugs I found I had 4 out 6 different type pugs replace them with the NGK (ZFR6F-11G) and New O-rings on coil packs. Install the new coolant tank and may sure all was good, but as I was filling the tank, started it up and the top hose blew off, (platic tank inlet brook off)now New radiiator n hoses and t-stat ( awaiting for them to arrive) so I went from $6.00 to $300.00 repair because of the owner before never took time to do maintence on it, my question out of all this is can I use Peak long life antifreeze 50/50mixed in it since it almost bone dry now?????