While it's running, pull the oil fill cap out and watch the rocker moving. If the sound seems to be happening once every time the rocker moves, it's a valvetrain knock. If it seems to be happening twice as fast, it'll probably be coming from the bottom end.
Oh, and I'll take your snow if you don't want it. This'll be my first winter away from WI and I think I'm gonna go through withdrawal down here in the depths of Missouri.
Yes you have a CPS.
Bonus of the 2.5 is you don't have to crawl on the ground to change it.
Symptoms are usually a no-start, or randomly dying while driving.
It's the same part for a 4.0.
You can do the rod bearings from under the truck, and they're going to be much easier than the mains.
Gonna be a lot more work if you have a bad wrist pin though.
I don't understand the logic behind destroying a perfectly good vehicle that "supposedly" got 19 mpg when it probably actually got more, to get higher payments on a vehicle more expensive to maintain that got 21 mpg.
I really, really don't get that.
I don't think it was that they used a different tranny, but more that they didn't make a lot of 2.5 XJs with an auto. Off the top of my head, I remember seeing one. All over 2.5 XJs I'd ever seen were 4 or 5 speeds.
First time I changed my pump, I did it with the tank in the truck, and the O-ring didn't seal right, so it leaked if I filled it up past 3/4.
Even if you don't buy a new tank, I recommend dropping it to change the pump.