Brian's Morning Newsletter
Tuesday, April 17 2012
Good Morning
Yep, the non-mechanically inclined can skip this morning's newsletter.
I'm posting this on the LostJeeps forum this morning so it is a dissertation on the turbocharger repair as much as a newsletter.
The Jeep lost power with a puff of smoke during the last leg of a ~500 mile round trip to Kenton, Oklahoma from our home in Northern New Mexico, near Sapello (87745)
I trouble shot the engine problem using a combination of experiences. As I suspected it was the turbo, because it has been making whining noises since Fall. Nell and I replaced the fuel filter in the parking lot of the gas station in Wagon Mound where the trouble occurred, so the lack of power wasn't a fuel delivery issue. This was the first trip of the season using biodiesel, so we had to get the fuel filter out of the way.
Also I now have the bluetooth OBDII scan tool and the Android App Torque running. It had reported a MAP sensor discrepancy, nothing more. I have not been able to dig very deep in the Torque App, or at least not been able to get very much from the App nor the Wiki and forum, but I have played with the program often.A nyway I didn't know if I believed the MAP sensor error under these conditions. It didn't really matter what the Jeep's computer was saying, this wasn't my first dance with a blown turbo. I knew the symptoms. The most important is to monitor the engine oil very closely. When a turbo breaks it often sucks the engine oil normally used to lubricate the turbine shaft bearings and shoots it into the diesel engine. The results can be quickly disastrous. The engine could enter what's called a "runaway," condition, meaning it is feeding on its own motor oil. A diesel can maintain a runaway condition until it uses all of its engine oil, and when it's out, the engine having none left for its own lubrication dies a horrible death.
We were hopeful. It was Easter. Alas, the fuel filter didn't change the fact that the engine didn't have any power. We drove the Jeep up a block and back amid a terrible cloud of white smoke. I shut it off and thankfully,it did so. There was oil dripping out of the bottom of the muffler. The only thing left for us to do was figure out how we were going to get ourselves and our Jeep the rest of the 50 miles home with out starting the engine again.

turbo-exhaust-side
(turbo-exhaust-side) After much shuffling of vehicles we had the Jeep in the shop. The VW Diesel Rabbit cylinder head project got literally put on the back burner as it easily went with a light push from Jack and me. The Jeep was turned around in the field and with the aid of a long tow chain we were able to sling it around and get it close enough to the garage door to pull it the rest of the way in with the chain hoist. While the VW weighs around 2000 pounds the Jeep weighs in at nearly three tons.
I removed the air charge upper hose. Oh by the way, the air cleaner box wouldn't budge until I read about it from the Lost Jeeps forum that it requires a hellofa good yank to free it from its rubber holders. Thanks Lost Jeeps. The coolant tank also needs to come out, and a couple cables get unclasped, all in all it was simple to get to the turbocharger. Once I had the air charger hose off I was able to get my finger into the air side of the turbine fins.What I felt wasn't good. The turbine was loose, wobbly loose, not free and easy loose.
After reading on Lost Jeeps about the frailty of the air charger hoses I was on the look out for rubber disintegration. Oh, I should explain what an Air Charger hose does for the folks in the dark. In the modern turbocharged engine air derived from the air filter, is sucked through the turbine, driven by the exhaust gas turbine which has the unwanted effect of heating the air, so it is blown through a special radiator called an Intercooler where the air is cooled before being injected into the engine.

(Turbo still in) Most everything with the Jeep diesel engine is logically designed, well at least so far I'm happy with what I have worked on, which includes replacing the timing belt. In the above photo the exhaust pipe is removed from the turbo, a process made so easy becasue of a well designed clamp and a flex pipe below, honestly I couldn't believe that it was off and completely out of the way as quickly as it was. The four nuts holding the turbo was just like any I've encountered before, a bit of Mechanic's contortionism and many many 1/16 turns with a box end wrench and off it came. For a brief moment after looking in the factory service manual (FSM) I thought maybe there were only three nuts, but no, there are four.
It says in the FSM that the splash shield under the engine needs to be removed to get to the oil return pipe bolts. I haven't been able to get one of the bolts off my Jeep's splash pan, so I didn't remove it. On the bright side I don't see how it would have helped. It really isn't in the way. The engine mount is in the way, but not the splash pan, at least not the type on my 2005 Jeep Liberty. Yep, those two eight millimeter bolts were a tight squeeze to reach. I tried a few things, extensions, swivel adapters, pneumatic ratchet, finally a stubby handle ratchet with a eight inch extension got them both.

(turbo-intake-side) Mopar parts lists the turbo for a whooping $1,595.00. From the image above you may be able to make out the damage to the aluminum housing where the turbine was rubbing, no doubt the noises I heard. Reed Patridge from
http://turborepair.com says a cartridge can cost from $800 to $1300 depending on a lot of things not the least of which is that damage to the housing.

(turbo-bro-Jack) My brother helped and made me persevere. Besides the damage to the housing, the shaft is broken. Yeah, when I blow a turbo I leave nothing undamaged. Well that's not entirely true, I did shut off the engine and checked the oil, so no damage beyond the blown turbo. I trust Reed completely, I recommend his team after he went beyond the call of duty to locate a turbo for my Isuzu diesel a couple of years ago. Since I last spoke with him he has revamped is site and now focuses on racing as well as standard turbochargers. For us CRD lovers Reed has in stock a (large) selection of Garret turbocharger parts

(turbo-larger-exhaust-side) Once I had the turbo on the bench I noticed that the shaft wasn't connected from one side to the other.

(turbo-larger-intake-side) Variable geometry turbochargers, I had to look them up
http://en.wikipedia.org/wiki/Variable-g ... rbocharger Pretty cool stuff if you ask me.

(turbo-part-number) 35242112G
LIBERTY CRD 2005 R2816K5 (VM) 160 2.8/4 D GT2056V 763360-0001 35242115F
Okay I'll give ya one odd ball picture from the yard this morning

April2012-elk Four or five bull elks were right outside our door prior to dawn. Unfortunately as I had the door open to take some pictures the dogs got out and scared the elk away.
Alrighty then, I gotta go finish irrigating the field
Brian Rodgers