jackB

I bought a 2007 JK (manual) with 144K miles. It runs great.
I changed all fluids and calipers pads and rotors, plugs and wires.
Planning to do a few longer trips this summer.
What else should I look into in terms of preventative maintenance?
Thanks
Jack

resharp001

By "all fluids" I presume you've included transfer case and gear oil for both axles. Inspecting steering components is always a good idea. TB, DL, and TR joints along with BJs. Does the jeep have factory or aftermarket drive shafts? If they are aftermarket double cardan shafts, most people overlook greasing the centering joint on the DC end....both because you don't really see the zerk and also cuz you have to drop the shaft to access it and most put it off.

Mr.T

The only other thing that comes to mind is having the battery capacity checked using the type of tester that uses a large current pulse and reads out in CCA (cold cranking amps). If a new battery is in your future, check out this test of an Odyssey.

Rednroll

For us geek engineering types, you create the most interesting discussion threads.

Missed that one when you originally posted. Time for me to jump in and revive some discussion.

jackB

The starter turns really slowly even though the battery is freshly charged. I think that either the battery or the starter needs to be replaced.

Mr.T

A good tech will use a clamp-on DC ammeter and a volt meter to see whether the starter is drawing too much amperage, or the battery voltage is dropping too low. A quick and dirty method with no test equipment is to hook up a set of jumper cables to a good battery, if it turns over a lot faster the problem is likely the battery.

EHarris

At 144 I would just change the starter anyway. I went with a new AC Delco Professional since the Mopar ones are hard to track down these days. It's 2 electrical wires and 2 bolts. Takes about an hour to do properly.

MarkF2

Waterpump, belt, and hoses?

EHarris

Water pump is up to you along with radiator. When I got to 140k I did the radiator. I should have done the water pump then also since I am about to do it this weekend. Upper and lower hoses for sure since its less than $20 and I would use the constant pressure hose clamps. Belt is only $15 so might as well if it looks original. PCV valve, Diff Fluids, Trans Fluid and filter, Coolant Flush, Brake Fluid flush are a few other things that come to mind. All really depends on time and budget. Buying it used you never know how the past owner treated it. All of that and you are still under $100 excluding a new radiator which is about $200.

I buy my stuff from quadratec and rock auto. They also price match each other.

gfe jeep

07 & 08's have had cracked manifold issues, mostly the drivers side.
I found mine when checking the new spark plugs I installed!