A newish Turbo on a C-15 6NZ blown

Hi All

I recently bought a 2002 Pete with a CAT 6NZ58432 for the engine. It has 3.55 rears, an Eaton 18 speed and 701k miles on it. The CAT remanned turbo was put on 1.5yrs + 30k miles ago and the exhaust manifold is still the original stock one. No overhaul on it and 6 inch straight stacks.

Yesterday I blew that newish remanned turbo and there was quite alot of leaking oil and white smoke. I pulled over immediately but being on the side of the road loaded with 45k of flammable product I didn't look too much and just disconnected the line to peek at the turbo and saw the fans were indeed bent. I didn't risk anything else and called a tow immediately as the traffic was bad. I've not been able to look at the turbo anymore just yet and I'm trying to gather information before making the drive out there.

TBH this is my first time dealing with a turbo which is why I'm asking for any advice.

I am thinking that maybe the culprit to destroying the turbo was the exhaust sleeves / exhaust manifold? I'm currently thinking about replacing it with a PDI exhaust manifold as I read the CAT ones are just iron and not worth it at all compared to PDI. Is this wise or just a fools errand?
I'm also currently planning on putting either a stock CAT remanned turbo or maybe a Borg Warner one but if the Borg one is an upgrade from stock then I'm not sure what all I need do to make sure it's done right. I've never gone outside OEM stock before.

I've heard this truck is basically already auto-setup for me to take it to 550 but I've read that if you do bump up the HP then you might have to repower everything behind it too depending on your setup?
I'm wanting to do this right. I'm not out seeking the most powerful truck but moreso the best functioning truck + the best bang for my buck. Longevity is my number one goal here. Thanks for any insight. I'm all ears here.

 

Interesting..are Borg turbos considered for a core charge in the future or do I need to keep the old Cat turbo?

 

where did u get the Borg turbo from?

I'm actually on the phone with PDI about their exhaust manifold...he is trying to sell me the turbo too but atm I can get a CAT remanned turbo for $1650 vs $2100 for a big boss stage 1 turbo

PDI is saying if I broke the shaft the old turbo might not count as a core and I'll have to pay a core charge...which if true I'll almost certainly go aftermarket..