Diagnosis - I now have a turbo that sounds ds like a supercharger over 2200rpm... we all know what that means!! Bent vanes on the compressor.

What are the chances that GM is going to warranty my OEM turbo on a truck with 65,000km and is deleted. Probably not great.



Quote from a shop to do the DT44 is $4,700 cdn. (Shipping is $700) and I'm 3 weeks out from the parts showing up. What do I do here?

Chances of GM paying at least partial: 65k km - pretty good. Deleted - ZERO. Can you restore it to stock?

 

Can't. And definitely won't. My tuner is 2000km away and my exhaust is in 20 pieces at the scrap yard

 

I will rephrase the question. I know the turbo is bad (vid won't upload) I'm looking for OEM fitment, just something that isn't going to fail on me for a while. And isn't going to break the bank. Factory is $1700, DT44 is $2600. Is there another option? prices massively inflated due to location, gouged shipping and being in commie CDNdollars

 

Other than stock or the DT44 there is the garret powermax, but ever review comparing the 2 says the DT44 is superior. WC Fab makes a exhaust mainfold that allows for a T3 style turbo to be mounted if you want to go the more custom route. Can always save yourself some money and install yourself if you are mechanically inclined.

 

t

 

Not sure this is on point; but when I had my 2005 Jetta Turbo Diesel, folks would downshift and run up the RPMs to generate exhaust heat to burn off any carbon deposits on the turbo blades. Could this be a reason for a turbo failure? Too much carbon build up on the fins?

 

In his case being in northern canada more than likely ice on the fins caused the issue. The stock compressor wheel has very thin blades and ice freezing on them can cause them to bend.

 

Could be ice from the catch can/hosing? I seem to recall that happening to a couple of users here a while back.

 

I am highly suspect of the ccv line kicking frozen sludge into the turbo. I don't have a catch can (due to freezing issues) so that is likely the culprit. Has aanyone done the DT44 swap? I am worried about my tune no interacting property with the vgt function, the shop I'm dealing with called suppliers and both raised concern over "noise" from both the garrett and stealth options. I have also rreading seen a video of break in noise... which is a new one to me.

 

You can run the DT44 on the stock tune, you have to swap over the VGT actuator from the stock turbo. You wouldn't notice much of a power gain without the tune, maybe a little more up top but it would run just fine.

 

They assured me (as well as the tuner I used) that it would run fine. I mean a turbo is a turbo if it meets factory parameters.

Is this thing going to sing like a jet? And is break in noise something common? I've never heard of such a thing. Bearing and clearances should be already set, why would it have break in noise?

 

Is this thing going to sing like a jet?

You say that like it's a bad thing.....
Turbo whine - mighty fine!

 

I'm on my 3rd turbo @~78000 miles.
2016 Stock.
The original turbo was replaced under warranty, no cost to me.
2nd turbo suffered a bent fin about a year ago. GM covered 1/3 of the cost even though I was past the 2 year warranty. My cost $2000. When initially diagnosed the warehouse in Chicago had 18 turbos in stock and my rig was scheduled for repair the next day.
A call from my dealer that day stated all turbos in the Chicago warehouse were no longer available due to a new part # being released.
I waited another 4 weeks for the new part # turbo to be available.
I'm running the new part# turbo now, so far so good, but, only a year old. My dealer had no info on the change... just a new part#

 

Curious if the 'new' part number turbo is as susceptible as the old one. I'm on my 2nd turbo, myself.

 

I'm on my 3rd turbo @~78000 miles.
2016 Stock.
The original turbo was replaced under warranty, no cost to me.
2nd turbo suffered a bent fin about a year ago. GM covered 1/3 of the cost even though I was past the 2 year warranty. My cost $2000. When initially diagnosed the warehouse in Chicago had 18 turbos in stock and my rig was scheduled for repair the next day.
A call from my dealer that day stated all turbos in the Chicago warehouse were no longer available due to a new part # being released.
I waited another 4 weeks for the new part # turbo to be available.
I'm running the new part# turbo now, so far so good, but, only a year old. My dealer had no info on the change... just a new part#

Do either of you have a catch can ?

 

I'm not even looking at anything GM "produces/procures" anymore. If an item fails, I put whatever I can find to be bomb proof in place.

 

Would a provent200 work for you ?

 

Are the bent fins caused by ice buildup?

 

Yes. Ice and tiny clearances don't play well together. Doesn't help that the stock turbo wheel fins are very thin.

 

I'd route it into a not so air tight container places under the hood somewhere. Not a big fan of oil all over the underside or coating my trailers/toys.
Turbo to be fixed first tho

 

Again, like I posted earlier and later deleted.
Try running the PCV to the dirty side of the airbox, the air filter will stop the ice chunks from getting sucked into the turbo and damaging the fins.
An air filter is easier and cheaper to replace than a turbo.
GM has a horrible design dumping the PCV into the intake just in front of the turbo.

 

DT44 and associated parts ordered this morning, now starts the waiting game. And to see how bad I get jerked around by shipping. Should expect them in 2 weeks.

 

Diagnosis - I now have a turbo that sounds ds like a supercharger over 2200rpm... we all know what that means!! Bent vanes on the compressor.

What are the chances that GM is going to warranty my OEM turbo on a truck with 65,000km and is deleted. Probably not great.



Quote from a shop to do the DT44 is $4,700 cdn. (Shipping is $700) and I'm 3 weeks out from the parts showing up. What do I do here?

I’ve always thought that turbo is a bad idea. The last one I had was in my 1984 Chrysler laser.

 

If you are able to run a catch can in cold climates, I run the Australian version of the Provent...you woudl be blown away by the water it catches during the winter.

jjw
ND

 

If you are able to run a catch can in cold climates, I run the Australian version of the Provent...you woudl be blown away by the water it catches during the winter. jjw ND

True. I was private messaging a member who is in Minnesota, he sent me some pics of his Provent during the winter and it was catching crazy amounts of water. I am in Colorado where it is extremely dry in winter, and catch no water at all. Humid cold like the midwest gets can create a ton of condensation in the PCV system. No wonder it freezes and bends the thin fins on the OEM turbo. The Provent's pressure relief valve should open if the element freezes, but that creates an oily mess and potentially an even worse mess at the rear main seal if it didn't release the pressure for some reason.

If I lived in that kind of humid/cold climate I think I would give serious consideration to just venting the PCV to the atmosphere or plumbing it into a bung in the exhaust after the DPF. That might create a nice smoke show during regens though!

 

This is the third winter with my Rycco setup. I have mine routed with a draining oriantation like the factory hose was and it is also almost the exact same routing as the factory. It also being just able the manifold thaws it which if frozen. I have had zero issues and feel the combo of keeping oil out of the intake system (EGR) as well as water/ice off the turbo is a win win.

I did a write on my install when I did it back in Jan 2020.

jjw
ND

 

Got the new dt44 turbo installed and running like a champ. On the overhand....... The factory compressor wheel isn't looking so hot. Text book "strike" damage from the ccv line. It was DRIPPING oil when the line was disconnected.... This is a MAJOR!!! Design flaw for anyone living in cold/cold-ish environments. I should not have to resort to the headaches of a frozen up catch can, having to plug in a heated catch can or having to find "alternative means" to solve it. Unbelievable.

 

Damn that tubro was a hungry boy. Hows the play in prop shaft?

 

No power gains, bit more wooshy noise but nothing crazy. OEM has a bunch of play. I will probably have it rebuilt just as a back up but yikes. I would never have thought it would bend from frozen oil/ice in a vent line. Last gm product I will ever own... their engineers need a reality check.

 

Last gm product I will ever own... their engineers need a reality check.

GM didn't design or build the turbo, your frustration should be directed at Honeywell/Garrett.

I've had no problems in the winter with my Provent catch can, BTW. Yup, it sucks to have the bent fin problem. Just seems silly to write off all GM vehicles because of something they didn't build.

 

Better angle of the damage

 

Sooo. I started the truck this morning and had an engine light. Code P003A (turbo boost position sensor over parameter)
Does anyone know the procedure to recalibrate the vgt actuator?

 

Code P003A (turbo boost position sensor over parameter)

I would give duramax tuner a call, from what im reading the need to recalibrate can be caused by removal and reinstallation. Weird they don't mention anything about it on their site, when you have to reuse the stock actuator on the DT44.

Update: Did you use the actuator rod supplied with the turbo?

 

So the VT (vgt) position isn't hitting zero upon shut down. It bounces between 100 to 9/10 and then shuts down. Triggering the shut down engine code for the next start up, as the position sensor tripartite a fault on the turbo. Hopefully I can find aacalibration to fix it or there is a 200km trip back to the nearest mechanic.

 

From everything ive been reading it sounds like a recalibration is needed and a mechanics scan tool is required.

 

Update: Truck is back up and running with no codes. The mechanic had to loosen the VGT actuator rod and add some slack. Code was a buggar to get fully cleared.

 

I think it is true that the turbo design is more on Honeywell/garret than GM. It is worth considering if a different catch-up setup might help in the future, especially if you are in a cold climate. My Provent has been solid, but I can see why you'd be fed up after what you have been through. As for my own experience, I once did a Powerstroke CCV delete to avoid similar issues, but ended up with some pretty bad oil leaks because I didn't properly vent the system afterward.