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post #1 of 2 (permalink) Old 10-15-2017, 02:28 PM Thread Starter
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Join Date: Sep 2017
Posts: 3
Introducing myself

First Timer, I'm the proud ower of a 06 Jeep Commander 4x4 Limted 5.7. I purchased Used back in 2011 with 60,000 miles. My wife drove this XK around until 3 months ago with 140,000 miles when my Hemi dropped a valve seat destroying the #5 cylinder walls and piston. We purchased her a new car. And I got me a new Toy. I decided to replace block And damaged piston. Basically just had engine rebuilt. I've placed block back into Engine bay. As I was beginning to install roller lifters I've noticed that I've had two different types of roller lifters. 8 are rounded off at the top where pushrods sit and the other 8 are squared off where pushrods sit. After looking into the Internet, I found that the rounded off lifters are Non- MDS roller lifters. Is this correct? I'm guessing someone deleted MDS, prior to me purchasing this XK. I've driven this Jeep to West Virginia from Texas several times. I do remember my mileage being no more than 16mpg. How can I tell if my MDS was actually deleted? I've posted two pictures 1- of Roller lifters and 1- of the XK. I'm looking forward on learning from Y'all. I'm eager to get my jeep back on the road.
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post #2 of 2 (permalink) Old 10-15-2017, 10:17 PM
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Join Date: Oct 2015
Location: East Coast of Florida
Own a Commander?: Yes
Model year: 2008
Trim Package: Sport
Power-Train: 4.7L V-8
4WD
If 4WD - system: QT-II
Current Mileage: 102,100
Posts: 5,194
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Quote:
Originally Posted by 06XK View Post
First Timer, I'm the proud ower of a 06 Jeep Commander 4x4 Limted 5.7. I purchased Used back in 2011 with 60,000 miles. My wife drove this XK around until 3 months ago with 140,000 miles when my Hemi dropped a valve seat destroying the #5 cylinder walls and piston. We purchased her a new car. And I got me a new Toy. I decided to replace block And damaged piston. Basically just had engine rebuilt. I've placed block back into Engine bay. As I was beginning to install roller lifters I've noticed that I've had two different types of roller lifters. 8 are rounded off at the top where pushrods sit and the other 8 are squared off where pushrods sit. After looking into the Internet, I found that the rounded off lifters are Non- MDS roller lifters. Is this correct? I'm guessing someone deleted MDS, prior to me purchasing this XK. I've driven this Jeep to West Virginia from Texas several times. I do remember my mileage being no more than 16mpg. How can I tell if my MDS was actually deleted? I've posted two pictures 1- of Roller lifters and 1- of the XK. I'm looking forward on learning from Y'all. I'm eager to get my jeep back on the road.
@06XK ;

Welcome to the forum;

Thanks for including all of your vehicle information.

In your user profile - there are some questions specific to your Commander, if you could please answer them, all of your Commander's info will be displayed underneath your username - like you can see underneath my avatar.


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Last edited by Big Blue; 10-15-2017 at 10:26 PM.
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