Not sure on your engine, but mine was tight too. Make sure you use thread lock, On one of mine I had to guess. I used the torque wrench on a free bolt to "feel" how much pressure I had to apply to get to the torque spec, then using a regular wrench, applied the same pressure, and maybe a tad more as I could feel the torque being applied.
Need the code of your engine to find the manual.
Need the code of your engine to find the manual.