^+1. What is the recommended mileage for a timing belt change and is it a difficult task?
97,500 miles. Joes74challenger and I were discussing that recently. It's kind of an odd number, but I suppose there's some statistical failure rate number associated with that. Otherwise, surely they would have rounded it to 100k miles. For sure, I did
It's not too bad a task, but it helps to be agile. There were several times I needed to get underneath, then get back topside, and I'm nursing a bad shoulder right now. You quickly realize the added challenge of standing up without being able to rely on your left arm
I now have much more respect for folks living with physical challenges !
I used a timing belt kit that comes with the required new tensioner, tensioner mounting bolt, and idler. But it lacks the required new idler bolt and new crank pulley bolt. Go figure. I picked those 2 up at the dealer.
The trick to getting it over the tensioner was realizing the tensioner had 2 springs in it. You can rotate it ~30° and it feels like you hit a stop. And the belt won't slip over. I tried several tricks to get it to slip over, and employed my wife and daughter to help, but nothing I tried provided enough slack in the belt to get it on the tensioner.
Finally, in frustration, I over-torqued the tensioner only to find another ~30° of rotation, which then allowed the belt to slide on easily. What I was hitting - what I thought was the stop - was actually the 2nd spring engaging inside the tensioner. I wish that had been noted, preferably in bold lettering, somewhere in the instructions!
The other tricky part was installing the cam locking tool. It is two pieces which must be slid in between the two can gears. Again, extra hands are needed. Someone has to be slightly rocking the crank while the other is up top holding the two pieces against the two gears while trying to line them up with each other. You gotta hold your tongue just right
Book time on this is about 2 hours. I probably have 6 times that
I was taking my time, taking lots of pics, reading and re-reading the manuals, and making sure I was following the Mechanocratic oath: "First, don't break anything."
But with a couple more go-rounds, I could maybe get it down to 2 hours