Bolts will only tighten so much, only true way is to replace. Its not bad maybe 30 minutes to get your tools out/swap it and clean up
What Tom said. There are spacers that prevent the bolts from being tightened past a certain point - if you try to tighten them down past that you're likely to break them. So you'd be compounding your problems.
Passenger side is the harder of the two sides to repair since the heater lines run over top of the valve cover, but once those and the coolant reservoir are out of the way it goes very quickly.
2003 Renegade, Black
- 3.7L, 42RLE, 4.10's, ARB Bull Bar, Smittybilt XRC 9500lb Winch, 4X Guard Trans skid, Skid Row Engine skid, Factory T-case & Tank skids, Custom BoulderBars, JBA Front Coilovers, OME 948 rear springs, Bilstein rear shocks, JBA A-Arms, Moabs with Goodyear Duratracs 265/70-16