"new" CRD and new turbocharger

Trekker · **Joined:** Tue Jul 21, 2009 11:42 am **Posts:** 33

I have been looking for a CRD for several months now. Got lucky and bought an 05 CRD with 50k miles from a forum member in Austin, TX.

Drove it back to UT and am very happy. Averaged 24 mpg for an 1100 mile trip, some of it at 80 mph. My best tank was 27 mpg, which was through hilly country that slowed me down. Hope to do the GDE tune SOON.

Turns out that the turbocharger died this year and was replaced under warranty, so I have a new turbo and new hoses and a new radiator, all replaced this spring. Have not had a chance to look at hoses or MAP sensor, but hope to do some of that work this weekend.

SO, what should I know about this NEW turbocharger? Is it improved over the old one, the same, something completely different? What can you tell me about it?

Thanks![/i]

flman · **Posted:** Thu Sep 10, 2009 5:33 am

Have not heard that the original was failure prone, so it is prolly an exact replacement, but what do I know, just taking a guess based on logic :?:

linewarbr · **Posted:** Thu Sep 10, 2009 7:48 am

IIRC, the turbo on our CRD's is a Garrett VNT 15. I've only heard of one or two turbo failures on this board, so if it was common it would be covered quite a bit more extensively here. "gmctd" has a write-up on an SEGR install in the tech section where he also includes some pics of his turbo, pulled off the Jeep and broken down. All the specs are there.

Just my 2 cents, but I think always allowing your turbo to cool before shutting down the engine is a "best practice." I don't obsess about it, but after putting it in park I turn off the A/C and let it run some - depending on how hard and at what speed I rode it - then shut it down. This past weekend we had a "CRD Workday" locally and another member commented how there was no oil around my turbo return line. (Our turbos are oil-cooled, so there is a drain line running from the turbo housing back to the engine block) He said his is all gunked up, as has been the case with every other CRD he has looked under. I asked him if he lets his turbo cool down before shutting it off, and he said no. It may not make a difference, but it is a little piece of mind to know I am at least not contributing to any oil coking in my turbo or return line.

Congrats on the new CRD.

ac5501 · **Posted:** Thu Sep 10, 2009 10:50 am

Trekker wrote:

SO, what should I know about this NEW turbocharger? Is it improved over the old one, the same, something completely different? What can you tell me about it?

Thanks![/i]

I took my CRD to B in Laws shop to check out an oil and air leak. He said it was comming from the turbo, and since it (was still) under warranty I should take it to the dealer. So I did. They told me I needed a new turbo. I got the turbo and new hoses just before the warranty expired

.

I'm really not sure how bad the turbo really was. I did ask if I could have the old one but since it was a warranty job I could not have it.

When the guys at GDE did my tune, they remarked that one of the "pieces" of the turbo "system" was different. So it does appear that some things with the stock turbo have changed.

mikey1273 · **Posted:** Thu Sep 10, 2009 4:57 pm

question about letting the tubro cool. I am aware of this but am not sure how long to do this. I make an effort to remember. what I do is park get my seat belt off, pick up my cell phone and unplug it from the charger if plugged in. change from sunglasses to my regular ones if its sunny out, gather what ever I may have on the passinger seat to take inside. then turn off the engine. usually I have one to two of those things to do other than unbuckeling..... so I'm letting it run 20 to 30 seconds after I put it in park also I coast in to my driveway not pushing on the skinny pedal. If I think I have been driving hard I wait a bit longer. IS this enough?

KJ 119 · **Posted:** Thu Sep 10, 2009 5:47 pm

linewarbr wrote:

IIRC, the turbo on our CRD's is a Garrett VNT 15. I've only heard of one or two turbo failures on this board, so if it was common it would be covered quite a bit more extensively here. "gmctd" has a write-up on an SEGR install in the tech section where he also includes some pics of his turbo, pulled off the Jeep and broken down. All the specs are there.

Just my 2 cents, but I think always allowing your turbo to cool before shutting down the engine is a "best practice." I don't obsess about it, but after putting it in park I turn off the A/C and let it run some - depending on how hard and at what speed I rode it - then shut it down. This past weekend we had a "CRD Workday" locally and another member commented how there was no oil around my turbo return line. (Our turbos are oil-cooled, so there is a drain line running from the turbo housing back to the engine block) He said his is all gunked up, as has been the case with every other CRD he has looked under. I asked him if he lets his turbo cool down before shutting it off, and he said no. It may not make a difference, but it is a little piece of mind to know I am at least not contributing to any oil coking in my turbo or return line.

Congrats on the new CRD.

Wonder what dumass you're talking about? :lol:

DANG-IT.................. :twisted:

Joe Romas · **Posted:** Thu Sep 10, 2009 5:52 pm

mikey1273 wrote:

question about letting the tubro cool. I am aware of this but am not sure how long to do this. I make an effort to remember. what I do is park get my seat belt off, pick up my cell phone and unplug it from the charger if plugged in. change from sunglasses to my regular ones if its sunny out, gather what ever I may have on the passinger seat to take inside. then turn off the engine. usually I have one to two of those things to do other than unbuckeling..... so I'm letting it run 20 to 30 seconds after I put it in park also I coast in to my driveway not pushing on the skinny pedal. If I think I have been driving hard I wait a bit longer. IS this enough?

Lets go back a mile or two :lol:

Is your home at the bottom of the freeway ramp where go from 70 to a stop or are you driving several blocks into your neibhore hood through 25 mph side streets? In the first example your turbo is red hot and in th second it's have a few blocks to cool down

mikey1273 · **Posted:** Thu Sep 10, 2009 6:10 pm

I'm driving almost 2 blocks off the main street at 25mph or less and its mostly down grade too. the major street to my neighbor hood has a speed limit of 35. my daily commute is some on back roads and some on multi lane roads with traffic lights.

stoutdog · **Posted:** Fri Sep 11, 2009 2:18 am

mikey1273 wrote:

I'm driving almost 2 blocks off the main street at 25mph or less and its mostly down grade too. the major street to my neighbor hood has a speed limit of 35. my daily commute is some on back roads and some on multi lane roads with traffic lights.

Yea, then you probably don't have to worry about it... If it takes you more than a minute or two of <35mph driving to get from the highway to your destination, the turbo should be fine. That's, at least, what I've always heard...

flman · **Posted:** Fri Sep 11, 2009 6:09 am

I live on a 45 mph rural highway, I think I am OK with out the big long cool down, what do you guys think? Up a few hills the usual way home, down hill the other the less usual way home.

linewarbr · **Posted:** Fri Sep 11, 2009 9:00 am

This is the page from the Owner's manual about turbo cool-down. (Can you believe I actually read this thing?) Like I said, I think of it as a "best practice" to cool down, not a necessity.

mikey1273 · **Posted:** Fri Sep 11, 2009 11:41 am

thanks for posting the chart I have not looked at that page before.

most of my everyday driving is back road, stop and go traffic, or some highway followed by some stop and go. usually there is no load but me in there. So if I exit the highway and am driving slower I am guessing that the turbo has time to cool some, so that less than a minute idle time is ok.

then I'm doing ok and not damaging the turbo

OH Trecker congrats on the jeep hope you like it as much as I like mine

mackruss · **Posted:** Mon Sep 21, 2009 11:22 am

Joe Romas wrote:

mikey1273 wrote:

question about letting the tubro cool. I am aware of this but am not sure how long to do this. I make an effort to remember. what I do is park get my seat belt off, pick up my cell phone and unplug it from the charger if plugged in. change from sunglasses to my regular ones if its sunny out, gather what ever I may have on the passinger seat to take inside. then turn off the engine. usually I have one to two of those things to do other than unbuckeling..... so I'm letting it run 20 to 30 seconds after I put it in park also I coast in to my driveway not pushing on the skinny pedal. If I think I have been driving hard I wait a bit longer. IS this enough?

Lets go back a mile or two :lol:

Is your home at the bottom of the freeway ramp where go from 70 to a stop or are you driving several blocks into your neibhore hood through 25 mph side streets? In the first example your turbo is red hot and in th second it's have a few blocks to cool down

Thought i would chime in here, my Jeep is going to the dealer shortly to have the PCM flashed or replaced so i unplugged the EHM and went to stock CCV.

My question is with regards to the turbo and the blowby from the CCV in stock form, why does the oil in the vapour not get burnt up by the turbo if it passes through or is the blowby post turbo :?:

Joe Romas · **Posted:** Mon Sep 21, 2009 11:56 am

[quote="mackruss
My question is with regards to the turbo and the blowby from the CCV in stock form, why does the oil in the vapour not get burnt up by the turbo if it passes through or is the blowby post turbo :?:

[/quote]

The oil vapor goes into the clean air intake side of the turbo that's going to be compressed and then into the engine. It does not go into the hot exhaust gas side. Once the vapor is inside the the compustion chamber I'm told it causes a buildup on the tips of the injectors that will eventually mess up the spray pattern :shock:

"new" CRD and new turbocharger

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