I'd like to see some input as to where people's engines were assembled.

Mine was assembled in Trenton.

 

First thing you have to know is everything wears out. As other people have stated lubrication reduces friction therefore wear. So proper lubing is essential to longevity. Oil, gear lube, and any other fluid changes are your best protection but changing your fluids every thousand miles is just wasting money also.

If you want to run your JK forever then buy spare parts cheap as you can find great deals. For example, you can find engines and trannies for $600. Let the other guy spend tens of thousands on a Hemi and dana 60 running gear.

 

X2 to that, and don't forget the grease, slippery is better.

 

The not driving thing.. keeping miles low only works on high end cars.. BMW/PORSCHE/BENZ and obviously higher than that.

Domestic and even a high end VW -- low miles on blue/black book only bumps value few hundred .. compared to thousands on an exotic.

So drive the beast!

 

I don't believe the 4.0L to be bullet proof either... know people with Cherokees who lost em.. guess nothings perfect!

 

I've heard (from Two Guys Garage on Speed TV) that most engine wear occurs on the crankshaft journals and other bearing surfaces on startup. Once the crank is spinning it is not really coming in contact with the metalic surfaces as it 'floats' in a film of oil. Any way to minimize startup friction, especially if your Jeep sits for days at a time without being started?

 

I apologize ahead of time if this is a stupid question, but how do you find out where your engine was assembled?

 

X2 Thanks

 

x3 thanks....

 

I have added this to the engine oil threads:

The engine number is located on the rear of the block, just below the cylinder head, on the drivers side. There will be two sets of numbers. The first set is the engine number, the second set nearby is the last 8 digits of your VIN.

The second character in the engine number represents the manufacturing plant.

S = Saltillo
T = Trenton

Check your engines. Maybe we can see if the plant location has anything to do with engine failures.

Mine was assembled in Trenton.