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Rawze · 02-09-2021, **(Subject: RIP CM2250, 2013, 800,000km 20,000 hrs )**

(02-08-2021 )Hermjeji Wrote: So, can a bad turbo make 50 lbs of boost? The mech. said my turbo was gone, went and took a look at it as well, looks like it's got a decent bit of play in the lateral directions. Mech said he found a good used one, when he installed it, said the turbo was just spooling all over the place during startup, moving between 18-50 lbs of boost. I know these heads can't take more than 35+ lbs of boost (around there). My question is, can the turbo actually do this if it's bad? Or is something else going on.

I'm debating between a rebuilt or new turbo. But am just shocked that a bad turbo is making more boost than a good one? Truck is mandated.

if it was the wrong turbo then it can possibly over-boost.

if it was not calibrated properly, it can over-boost.

if the program in the ecm does not match the cpl of the enigne it can over-boost.

if the actuator is hanging up, it can over-boost.

======================

even so, sounds to me that someone does not know what they are doing. The engine cannot make 50+ lbs boost without throwing several alarms for over-boosting and turbo over-spooling.

BTW: there IS SUPPOSED TO BE SIDE-PLAY IN THE TURBINE!!!! -- THAT SIDE-PLAY SHOULD BE 0.045" OR LESS! ... DID ANYONE MEASURE IT OR DID THEY JUST GUESS LIKE A DUMB S$IT!??. ---== Was the housing chewed up? ===--?

just trying to help you make wise decisions any ways.

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also, if the engine is built right, you should not have to break it in on a dyno. Just drive the piSS out of it first few days and stay away from the highest engine brake setting for the first 50k miles. Have the valves re-adjusted in it after the 50k miles .. and then you can use the engine brakes on highest setting after that.

Hermjeji · 02-09-2021, **(Subject: RIP CM2250, 2013, 800,000km 20,000 hrs )**

(02-09-2021 )Rawze Wrote:
(02-08-2021 )Hermjeji Wrote: So, can a bad turbo make 50 lbs of boost? The mech. said my turbo was gone, went and took a look at it as well, looks like it's got a decent bit of play in the lateral directions. Mech said he found a good used one, when he installed it, said the turbo was just spooling all over the place during startup, moving between 18-50 lbs of boost. I know these heads can't take more than 35+ lbs of boost (around there). My question is, can the turbo actually do this if it's bad? Or is something else going on.

I'm debating between a rebuilt or new turbo. But am just shocked that a bad turbo is making more boost than a good one? Truck is mandated.

if it was the wrong turbo then it can possibly over-boost.

if it was not calibrated properly, it can over-boost.

if the program in the ecm does not match the cpl of the enigne it can over-boost.

if the actuator is hanging up, it can over-boost.

======================

even so, sounds to me that someone does not know what they are doing. The engine cannot make 50+ lbs boost without throwing several alarms for over-boosting and turbo over-spooling.

BTW: there IS SUPPOSED TO BE SIDE-PLAY IN THE TURBINE!!!! -- THAT SIDE-PLAY SHOULD BE 0.045" OR LESS! ... DID ANYONE MEASURE IT OR DID THEY JUST GUESS LIKE A DUMB S$IT!??. ---== Was the housing chewed up? ===--?

============

also, if the engine is built right, you should not have to break it in on a dyno. Just drive the piSS out of it first few days and stay away from the highest engine brake setting for the first 50k miles. Have the valves re-adjusted in it after the 50k miles .. and then you can use the engine brakes on highest setting after that.

Thanks for the feedback Rawze. I'm learning slowly, but from the above it could be either the wrong turbo (as I haven't seen the used one) or not calibrated properly. They SHOULD have just used the same program in the ecm that was originally there...right? It was stock file for the engine. The actuator wasn't hanging, I asked that question as well.

The housing seemed fine, not claiming i can feel 0.045". I'm being offered a temp turbo for a week (out of a 2015 ISX that's running fine) while I potentially go and get mine rebuilt. I'll take a closer look at that turbo with measurements and ask them to recalibrate.

Rawze · 02-09-2021, **(Subject: RIP CM2250, 2013, 800,000km 20,000 hrs )**

(02-09-2021 )Hermjeji Wrote: Thanks for the feedback Rawze. I'm learning slowly, but from the above it could be either the wrong turbo (as I haven't seen the used one) or not calibrated properly. They SHOULD have just used the same program in the ecm that was originally there...right? It was stock file for the engine. The actuator wasn't hanging, I asked that question as well.

The housing seemed fine, not claiming i can feel 0.045". I'm being offered a temp turbo for a week (out of a 2015 ISX that's running fine) while I potentially go and get mine rebuilt. I'll take a closer look at that turbo with measurements and ask them to recalibrate.

I am thinking that these people do not understand that there is more than one turbo design for the ISX depending on CPL. -- They look the same on the outside but they have different exhaust turbines depending the engine tier... they ARE NOT MIX-AND-MATCH components!

Hermjeji · 02-09-2021, **(Subject: RIP CM2250, 2013, 800,000km 20,000 hrs )**

Fantastic reminder. What I'll do is call cummins with the ESN and CPL, confirm turbo part #, match it with the turbo on there and the older one taken off just to make sure, and the one they propose. That will confirm the options on that path forward, and if it has to sit for a week while it gets rebuilt then so be it.

Waterloo · 02-09-2021, **(Subject: RIP CM2250, 2013, 800,000km 20,000 hrs )**

Call YTS turbo if you discover you do need a new turbo, this all sounds fishy to me, having been through this on my first in frame... I hope they installed the correct parts in that motor of yours. Best to check the parts list of the installed components. Been there, and done that.

Hermjeji · 02-09-2021, **(Subject: RIP CM2250, 2013, 800,000km 20,000 hrs )**

Here's the existing turbo on the truck. Was replaced some while ago, following up with old owner as to when it was. Part# matches what quickserve says. But why is the nameplate so different than original? Is this an aftermarket reman, or is it factory reman/new?

Rawze · 02-09-2021, **(Subject: RIP CM2250, 2013, 800,000km 20,000 hrs )**

http://myholsetturbo.com/resources/holse...ention.pdf

Hermjeji · 02-10-2021, **(Subject: RIP CM2250, 2013, 800,000km 20,000 hrs )**

Truck runs fine with a replacement used turbo that matched the part number. Went there and checked truck out again today. It's a "loaner" turbo. Brought my turbo back home to check it out, before I think about a rebuild. Will call the name that's been stated here out of georgia tomorrow, but wondering how shipping/customs/payment will happen from Vancouver. Also - in the event of any potential issues, how to go about the downtime etc. The other option is A#D#P distributors which has a local shop and gives 1 year warranty on rebuilds. I looked through the link you sent rawze, and i'll show more photos below. What i can tell is that the impeller nut is genuine, with my method of measuring play, it looks like it's more than ~1.5mm and the impeller can almost if not can touch the housing (see exhaust side where it looks like it's touching). Also, photos of the actuator, The video from rawze indicates that half the hole should be covered in the opposite position, it looks like it's more than that. The used block used is from the exact same engine basically, same CPL# as well, built roughly same time, and was an ISX 600 same as mine. Here are the photos for your thoughts:

P.S. wife wasn't too happy about me bringing a turbo into our family room.

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Hermjeji · 02-10-2021, **(Subject: RIP CM2250, 2013, 800,000km 20,000 hrs )**

Part 2 of 2