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Discussion Starter #1
Interesting I can post here but not in the regular discussion forum..

Oh well, maybe this is a right of passage into the regular forums. Picked up a 1 owner 2006 Limited 2 weeks ago. It had overheated due to a burst heater hose next to the firewall. Woman driving it was unaware until it was too late to do anything about it. It was a one owner vehicle bought here locally, so I rescued it and brought it home.

I figured it would be an easy fix, but after I ran a compression test, I found the rear cylinder on the driver's side to be at 0 PSI. Not a good sign. Removal of the valve cover indicated no discernible damage, except that the cam intake cam lobe had some slight damage, but nothing too terrible. Only way to really find out what was going on was to remove the driver's side cylinder head. As suspected, the intake valve seat came loose and the piston beat the daylights out of the seat and left alot of carnage in the combustion chamber. The piston is ruined, but the cylinder wall looks to be okay. For good measure, I removed the passenger side cylinder head and it looks okay.

I was initially going to just drop the pan, remove the offending piston and replace it but pan removal with engine in vehicle is a major pain, so I have decided to just pull the rest of the engine, load it onto an engine stand and fix it properly. Wish I could post pictures of the carnage, but I've got to have at least 5 posts before I can do that....
 

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Interesting I can post here but not in the regular discussion forum..

Oh well, maybe this is a right of passage into the regular forums. Picked up a 1 owner 2006 Limited 2 weeks ago. It had overheated due to a burst heater hose next to the firewall. Woman driving it was unaware until it was too late to do anything about it. It was a one owner vehicle bought here locally, so I rescued it and brought it home.

I figured it would be an easy fix, but after I ran a compression test, I found the rear cylinder on the driver's side to be at 0 PSI. Not a good sign. Removal of the valve cover indicated no discernible damage, except that the cam intake cam lobe had some slight damage, but nothing too terrible. Only way to really find out what was going on was to remove the driver's side cylinder head. As suspected, the intake valve seat came loose and the piston beat the daylights out of the seat and left alot of carnage in the combustion chamber. The piston is ruined, but the cylinder wall looks to be okay. For good measure, I removed the passenger side cylinder head and it looks okay.

I was initially going to just drop the pan, remove the offending piston and replace it but pan removal with engine in vehicle is a major pain, so I have decided to just pull the rest of the engine, load it onto an engine stand and fix it properly. Wish I could post pictures of the carnage, but I've got to have at least 5 posts before I can do that....
@DanielDD;


Welcome to the forum; The short answer is, you are a new member; New members can only post in the new member section until they reach 5 posts. That is explained to you in the New Member Required Reading below;

https://www.jeepcommander.com/forums/89-new-member-section/63025-new-member-required-reading-important-new-member-information-forum-requirements.html

UNTIL YOU REACH 5 POSTS - You will only be able to post in the New Member Section - but you can read any thread or post, in any sub-forum.

Once you hit 5 posts, your full user privileges will automatically kick-in and you will be able to post in the entire forum - including all of the sub-forums and you will also be able to post photos, URLs & hyperlinks.
Anyway, I'm looking forward to seeing the pics of your work once you hit 5 posts.

Welcome aboard.
 

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Discussion Starter #3
Thank you for pointing that requirement out to me. Somehow I must have overlooked it last night.
 

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Discussion Starter #4
Starter has been removed. There is a piece called a structural support that is giving me fits. It simply won't come out as the rear crossmember is preventing it from dislodging from the crankcase pan completely, preventing me from removing the flex plate bolts.

Never seen anything like it...

The only way to remove it is to lift the engine. No other way.

So, I have to lift the engine to make enough clearance to remove the structural support. Lower the engine back down, remove the flex plate bolts, remove the engine to transmission bolts and then I can remove the short block in its entirety...

Whew!
 

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Good call on pulling it to do the job right. No taking shortcuts will mean you can probably bet on much higher longevity.
Im tuning in for pics, hurry up and throw a couple more posts out there ! Oh wait now you have 6 !
 

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Interesting I can post here but not in the regular discussion forum..

Oh well, maybe this is a right of passage into the regular forums. Picked up a 1 owner 2006 Limited 2 weeks ago. It had overheated due to a burst heater hose next to the firewall. Woman driving it was unaware until it was too late to do anything about it. It was a one owner vehicle bought here locally, so I rescued it and brought it home.

I figured it would be an easy fix, but after I ran a compression test, I found the rear cylinder on the driver's side to be at 0 PSI. Not a good sign. Removal of the valve cover indicated no discernible damage, except that the cam intake cam lobe had some slight damage, but nothing too terrible. Only way to really find out what was going on was to remove the driver's side cylinder head. As suspected, the intake valve seat came loose and the piston beat the daylights out of the seat and left alot of carnage in the combustion chamber. The piston is ruined, but the cylinder wall looks to be okay. For good measure, I removed the passenger side cylinder head and it looks okay.

I was initially going to just drop the pan, remove the offending piston and replace it but pan removal with engine in vehicle is a major pain, so I have decided to just pull the rest of the engine, load it onto an engine stand and fix it properly. Wish I could post pictures of the carnage, but I've got to have at least 5 posts before I can do that....
It looks like I'll be pulling a 3.7 and replacing it due to the infamous Chrysler valve seat problem. I hope you'll post your progress over in the main forum.
 
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