Wow that's unfortunate. Those teeth got shredded hard. Good luck on the rebuild.

 

Could this possibly be signs of compressor surge? I've read up on it, and some people seem to think that compressor surge doesn't hurt a turbo, but I was wondering if the wheel is made of soft enough aluminum, could the forces of air on the turbo actually break the tips off the compressor wheel and cause that to tear it up?

 

I got a rebuilt T04B

 

Dude, I know. I've been eyeballing that set since you posted it. A great price too, I'm thoroughly impressed, but it's out of my budget right now. I'd absolutely love to buy it from you, but I think I'm going to have to get a cheap stocker for right now

 

it looks like something has been getting into your TID.

 

Well, the first one was the nut... pretty obvious there. The second one, I just don't know. Like I said, I found the compressor wheel completely crushed by my stupid *** over torquing the nut, so I assumed it was the fact that it did some in/out movement and the chipped teeth were what caused the damage. It's the only thing I can think of, I mean I've searched the inside of that TID and found absolutely nothing.

 

well, if the wheel contacts the housing the result is usually just bent fins, not chipped and scarring all over the wheel as if a bolt was bouncing off the blades as it spun. even small chunks of the compressor wheel will not cause that.

maybe you have someone that is hanging around sabotaging you.

 

Sabotage...

Quote:

Originally Posted by Beastie Boys

can't stand it, I know you planned it...

I rebuilt it again.

Round 3. FIGHT!


Below is tonight's work. I got my compressor wheel in the mail yesterday, took it to the "local" diesel shop to have it balanced. I got it back today and just got back home a couple hours ago. I placed the other 2 wheels in front of it. I think I'm going to hang them from my rear view mirror like a Puerto Rican hangs CD's




Here's a pic of it with the annealed copper gasket I made. I already had the material, so no harm in trying, right? It's 3mm thick, so it's not like it's going to blow out.




I have completely rebuilt it. I want nothing going wrong with it. I had to get a different CHRA because when I pulled the journal bearings out of the last one, the outside of one bearing was all scored up. I looked where the bearing sits in the CHRA and saw scoring inside it as well. I didn't want to screw anything up this time, so instead of drilling out and tapping the new CHRA for the 360° bearing, I used a new 270° thrust bearing and doubled up on the thrust springs. New journal bearings, dynamic seal, turbine seal, etc. I followed the instructions from G-pop shop on all the torque specs, and used red loctite on the shaft nut.

I can't see this thing coming apart now. As for sabotage, the only person it could be is my wife, and she knows it's only going to cost us more if she does that

Or maybe it's my 4 year old daughter, who recently covered my 7 in baby powder....

 

lolol

 

I also made a little blanket for the turbo to keep underhood temps down. I made it from welding cloth, so I'm pretty sure it's not going to catch fire or anything

I went ahead and bought new hardware for mounting as well. New grade 8 (or 10.9 or something like that) studs, and some copper coated lock nuts. I used them for the exhaust manifold, manifold to turbo, and downpipe.





So it's finally installed, and I started her up. I forgot that I completely ran it out of fuel before parking it. I usually do that when I know it's going to be a little while until I drive it again so I don't get gummed up fuel in the tank.

 

Goldmember stuck his "vinky" in your turbo

 

I bet this one lasts 4 weeks ;-)

 

Fingers crossed for u!

Specs of ur vmount?

 

Screw you James

Specs? Uh... some kind of godspeed intercooler kit with a bunch of pre-bent pipes that I had to cut the hell out of and roll all new beads, a godspeed aluminum radiator.... nothing really special. I just bought some metal and fabbed up some brackets for it. I had a thread about it a while back. I maintained the air conditioning as well. The hood is just a stock hood with a big hole cut in it with an Evo8 hood vent. Turbo is an S5/TO4B hybrid, 550/720cc pri/sec's, MSII v3 ECU, 3" exhaust. I did it all very low-buck. Still no idea what kind of numbers I'll be putting down.

 

It can't be.

I've built all kinds of engines from gasoline, diesel, rotary, and none of them have ever had problems. I build a turbocharger again, and again, and again, and it still breaks teeth and destroys bearings. I just don't get it. I don't know what I could have done wrong this time. I have a broken blade, the sides are starting to grind down, the bearings have play in them again. I just don't know what I could be doing wrong.

All I know is that I'm about ready to find something else to throw in here.

Someone please give me a reason to not swap this car to an LS1.

 

And by the way, I drove this car one time... around the block. I was still in process of tuning the ECU after a firmware flash. I also discovered an exhaust leak and was working on that when I decided I wanted to take a peek to see how things were doing inside the compressor when I saw it. I'll post pics later when I calm down. I don't even want to look at that god damn thing right now. I might do something drastic.

 

Dude i know how you feel i lost a brand new engine to this same problem, all the compressor wheel chunks went into my motor and put deep marks in my brand new housings i was real dark. I never had a problem with the turbo before it was rebuilt not saying you didnt do a good job or anything but the guy who did mine wasnt the best and didnt want to even talk to me when i told him just blamed it on my setup which was crazy!!!!!

what i found out later on is apparently compressor surge can loosen the nut as it loosens the same way. I had a japanese BOV but i was told my setup was the cause which was strange as i had the same BOV and setup before i rebuilt the turbo. Anyway do what i did go buy a garrett turbo as the nut tights the opposite way so any surge will cause it to tighten more if anything. Still havent had any issues and didnt wana take any chances after loosing two brand new housings and rotors and seals, anything new will most likely cover damages aswell.

 

i surge my turbo everyday, no issues to date. i don't run a blow off valve either.

course it's not a stock turbo though but about twice as big.

 

Well, I guess I need to go check compression again. I didn't find the chunk this time, but I have a feeling it's not going to get past the intercooler. It's quite a large piece.

Funny you should post that about compressor surge. I referred to it back on post 27, and I did suspect it back then, but now I'm pretty sure I've found the cause.

My HKS SSQV is not working. At all. I took the section of I/C pipe and put coke cans (they fit 2.5" ic piping quite nicely) in the ends to cap the segment off. I have a hose fitting on that section as well for the BAC, so I shoved a blow gun in the hose, clamped it off, and pressurized the section of pipe. I used the mityvac on the BOV and drew nearly 30"Hg... nothing. No matter how high the pressure gets or how much vacuum I draw... absolutely nothing. So I figure if the air has only 1 way to go, it's probably not going to go without breaking something. I guess once it takes a chunk off the compressor it throws it all out of balance and starts wearing down the bearings pretty quick.

Rebuild kit.... compressor wheel... rebalance... again.

(and a new blowoff valve )

 

sheesh, i still can't imagine this is due to compressor surge though but i can't think of anything else that would cause it either aside from real life gremlins who hate your turbo..

i hate the SSQV, mine had a similar issue so i took it apart and cleaned it, still didn't work right, eventually one day it started working and has worked ok since. but the flange leaks periodically... so i sealed the whole thing off and now it's just an ornament on the pipe until i redo it all for the twin charger.

 

I mean, compressor surge *could* in theory either
1) Break blades off the turbo. It's a TO4B V-trim so, approximately 55mm inducer and 70mm exducer. Not small, but probably not as hefty as yours is, Karack.

2) Destroy the journal bearings. When the air goes backwards through the compressor, the turbine shaft has to just momentarily stop and then reverse, meaning that the film layer of oil supporting the shaft can be wiped away, rubbing metal to bearing. (We run into this problem on the ship I'm on) Enough of those and you'll get some serious bearing wear.

Is yours a ball bearing?

 

Dude if i didnt live half way across the world i would give you my greddy BOV as i have a spare.

 

I have a Greddy type RS spare as well. I hated that thing because it leaked at idle, but that was before I ditched the AFM and got a standalone. That's why I got the SSQV so it would seal at idle better. As long as it doesn't cause any issues with boosting

and stops destroying these expensive damn turbos

I'll be cool with using it again

 

Set that unit on super soft and keep us posted on your progress, im interested to know whats the cause is as your situation isnt exactly the same as mine was.

 

It'll be a while, but I'll definitely update this thread as I figure it out.