![]() 03/03/2015 at 18:57 • Filed to: None | ![]() | ![]() |
The AMC Jeep 4 liter I-6 is indeed legendary. This one has even survived 2 overheats, sludge and a cylinder head replacement. All 6 plugs were in this condition and the vehicle has 150k on the odometer.
The co-worker who owns this particular 2001 Jeep Grand Cherokee (of which these plugs are from) said yesterday it finally started to hesitate and stumble. LOL
A nickel for rough comparison...
![]() 03/03/2015 at 19:01 |
|
If you can't measure the tolerances with a nickle, its not a Jeep engine™
![]() 03/03/2015 at 19:19 |
|
![]() 03/03/2015 at 19:27 |
|
my girlfriends WK v6 looked like that. 100k and no change. Runs much better now
![]() 03/03/2015 at 19:28 |
|
Looks burnt as well - amazing what a new set of plugs and wires can do. Remember the first time I did it on an old Volvo I had. It was like having a new car.
![]() 03/03/2015 at 19:31 |
|
Oh yeah! When I changed the plugs and gapped them to 0.28 on my Audi 1.8t... omg it was terrific.
![]() 03/03/2015 at 20:48 |
|
if the engine is such a tank why has it needed so many repairs? My 1997 montero v6 got to 227k without the engine being glanced at
![]() 03/03/2015 at 20:58 |
|
They are just now coming around to the concept of "maintenance". His wife drove the thing and let it overheat, etc. etc. Hardly ever changed the oil.
Its basically been through hell.
![]() 03/03/2015 at 21:42 |
|
If all the cylinders were still firing; it wasn't time to change them yet. I'm pretty certain that the Jeep manual says the interval on spark plugs is when 1/3 of the cylinders are no longer firing.
![]() 03/04/2015 at 12:27 |
|
I should check the plugs on my 4.0. 175k miles, and I got it at 169k miles so who knows what condition they are in. Summer project, along with swapping all the fluids.