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....
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....