Unfortunately the original poster said that cylinder #5 isn't holding compression. That cylinder isn't usually the one that goes bad; that distinction goes to cylinder #2, the front one on the right side. My guess is either a stuck valve or loose valve seat preventing the valve from sealing.
Not cheap but also not a terribly difficult repair. Especially since the left side cylinder head is much easier to remove/replace.
Sent from my iPhone using JeepForum
2003 Renegade, Black
- 3.7L, 42RLE, 4.10's, 4X Guard Trans skid, Factory Engine, T-case, Tank skids, Modded BoulderBars sliders, OME 927/948, Bilsteins, JBA A-Arms & 1/4" top plate, 1 extra rear iso/side, Moabs with Firestone Destination AT's 255/70-16