I am at 110,000 miles on my 2010 3.7L H3. I want to change the plugs myself but wanted to see if there are any gotchas or things to be concerned about. I am fairly handy and can do oil changes, throttle body and MAF cleaning, and fluid changes but I want to make sure the H3 doesn't have any issues removing the plugs like the Ford Triton or having issues with cross threading.

Thanks in advance,
Jason

 

Make sure you know what you're doing is my advice. I replaced the spark plugs on my H3 and one of them was apparently broken, I didn't notice until part of the ceramic fell off inside the engine (I thought I had all the pieces). I didn't know it fell into the engine until I started it and heard it rattle around and blow out the exhaust. This dinged up the inside of my engine. Was a $2000 mistake.

 

Shop vac. Clean(clear debris) before you replace & make sure clean while you replace. GL