Jump to content
SAU Community

Recommended Posts

Hello,

I have a problem with my recent setup. After installing new turbo its failing after 500km of driving, so pretty fast. 

My last GTX3071r gen2 survieved just 2 months also new one, around 2000km Just driving on highways, no trackdays, racing etc.

My actual setup is RB25det with 6boost manifold, vband Garrett turbo housing ar 0.83.

First thing I am planning to change is all water and oil hoses connected to the turbo, i have no idea what the other problem my be.

I have a question regarding water and oil hoses. 

There are two water hoses connected to the turbo, should it be connected in the right direction or it does not matter ? Does the water flows through the turbine just in one direction? May be this a problem or not? I mean the first hose comming from the engine block can be connected on right side of the turbo and also on left side? 

Also the say to use oil restrictors for Garrett turbos so i use 0.9mm screw with the oil restrictor to connect oil hose to the turbo. Is this ok or not?

Any ideas? 

My actual turbo starts metal grinding today so i know its going to fail soon. THe first one started exactly the same, metal grindings comming from the air filer and next day, the turbine rotor was bend and stuck, no boost at all. ;/

 

 

Link to comment
https://www.sau.com.au/forums/topic/480965-new-turbo-failure-gtx3071r/
Share on other sites

The water lines don't matter. The turbo wouldn't die even if they weren't connected.

 

 

 

Have you confirmed how much oil is flowing through the turbo? By taking off oil return and allowing it to flow into a bucket, you will likely find it is hardly getting oil

  • Like 1

GTX turbos have a restrictor built in i'm pretty sure, so as Ben says, sounds like insufficient oil flow. Water lines can go on either side but the highest side should be the exit, obviously. 

All Garrett turbos i owned  have something inside the connection hole. Maybe a restrictor but i dont know what size is this. My old GT3076r also has it and turbos from gen1 also. I used double restrictors so far i know, something like this in this topic below

My screw had a tiny restrictor that was glued at some point. My mechanic said this is no problem because high oil pressure will make the oil keeps going. I checked oil pressure on the oil line by disconnecting from the turbo and its ok.

So i decided to take a drill and make this restrictor much bigger from 1mm to 2.5mm. When i connected back together the metal noises from the turbo went away. Actually the turbo is way more responsive and has better boost with better oil flow. So can i drive like this? I hope i did not killed my turbo by driving some time with this metal grindings. When it got good oiling it runs like new so far. Maybe i saved my second turbo i dont know yet.

Also found this in google

If there is too much oil in the pan or if the turbocharger in your car is relatively lower, then oil can get through the seals and begin to blow out. ... This happens because the restrictor will starve the turbo of oil, which will cause all of the internals of the turbo (including all of the seals) to wear out.

E

 

Edited by Tomak
13 hours ago, Tomak said:

. I checked oil pressure on the oil line by disconnecting from the turbo and its ok.

That's not what I said and I don't even know what that means.

 

You need to check with the car running the flow of oil out of the turbo.

14 hours ago, WR33KD said:

When you put your new turbo in did you prime it?

No first time hear this, what is this about?

 

7 hours ago, Ben C34 said:

That's not what I said and I don't even know what that means.

 

You need to check with the car running the flow of oil out of the turbo.

I will be in my mechanic shop next week so i do it. I am not able to disconnect the oil return line at the bottom of the block by myself and on the top i dont have a space even to move it. Everything is so tight that i would have to disconnect all the turbo installation again. 

Is there a specific oil flow ratio through the turbine? How i am suppose to calculate this? Like check it on idling how much oil goes through the turbine per soconds ? The oil pressure is way higher at 6000rpms so what this test will tell me on idling?

 

Well, just have to make sure there are plenty of clean oil to the turbo. -4 oil line, no restrictor, and inline oil filter usually works fine. After installation must check to ensure there are plenty of oil coming out of the drain.

OK, 

13 hours ago, WR33KD said:

So you put a brand new turbo in bolted it up and just started the car normally?

just wanna get the facts right.

Can you tell me how you installed it?

Just started normally after installation, did like this with every garrett turbo. Actually my mechanic did it. Never told me about special starting procedure for new turbo. 

What I got told was to install the turbo like normal then unplug the cas and crank till the oil pressure light goes off then plug the cas back in and away you go.

if you don’t do this your starting your turbo dry and will cause damage to the bearings.

It has worked for both holsets I have used

2 minutes ago, WR33KD said:

What I got told was to install the turbo like normal then unplug the cas and crank till the oil pressure light goes off then plug the cas back in and away you go.

if you don’t do this your starting your turbo dry and will cause damage to the bearings.

It has worked for both holsets I have used

I will go to my tuner soon so i will ask about this.

  • 4 weeks later...

That's gotta suck, 2x dead GTX's :(  It will definitely be an oil issue. The remnants of your first failed turbo bearings will be in the oil pan. So drain the oil and bin the filter. New engine oil filter, fresh synthetic oil like Redline. If this hasn't been done already you really need to install 4AN braided teflon oil feed with inline 40micron filter. Don't fit the restrictor. Get an inline 4AN 1/8NPT fitting like below and screw a pressure gauge into it to verify oil pressure in the oil feed line. This should show up any issues. You want around 40psi in the line when the oil is hot. If it doesn't get over 60psi leave the restrictor out. If it's higher than 60 hot, fit a 1mm restictor but do this at the 40micron filter (after the gauze) so you can verify oil pressure after the restrictor. Also make sure the turbo oil drain is big enough, 10AN is a good size. And yes, always prime a new turbo with clean oil (use a syringe) prior to start up.

20200913_125043.jpg

Edited by Boosted Esky

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • So, I started this repair and got as far as "fixing" the holes with some fibreglass. God all those years working on boats came back quickly. I decided I'd reach out to some rust guys just to see what they would say about it. I came across a guy about 40 mins away and went to see him. He said the windscreen needs to come out, that there might be some more bits around the windscreen and he'd quote them at the time. But his quote was $300 to remove and replace windscreen and $3k for the damage he can see. He said he could respray the roof for $1200 and the bonnet for another $800 (somebody has previously rattle canned it, its horrendous). This is $5300 + any small additional bits. It's a lot, I get that and the name of one of my fave youtube channels 'Not Economically Viable' comes to mind.  I'm not being financially rational, but I've taken him up on the quote. He's opening a new shop in November with more room, so we're waiting for that. I'll leave the currently missing headliner out until then. I'm looking forward to it being fixed and having the paint looking nice again (lots of clear coat issues on the roof too). / flame suit on.
    • Oh and some up-and-comings; New rear drivers wheel bearing. I'll do that this weekend while the diff is out. The car is already up and the d/c axles and missing exhaust will help with space. This is the last bearing for me to do and I've been dragging my feet on it. I also have some new EBC blue stuff pads for the car and some new brake fluid. I haven't ever flushed the fluid in this car and looking forward to it. I have 600 degree fluid to put in. Not exactly "race fluid" but better than the typical stuff I have been using.
    • A proper clutch/plate type mechanical diff with quite a lot of pre-load and high locking % is better for drifting. Much more consistent in its behaviour. A helical can be annoyingly vague and inconsistent in how it responds under the sorts of abuse found in drifting.
    • Some updates here. I pulled the entire interior out, minus some trim to respray the seats with Colourlock dye. It turned out really nice though I accidentally let the dog in the car after and she scratched up the front seat.  This is what it looked like before, the colour was just washing out everywhere but thankfully the leather was in good nic. Then after the respray   And after the bloody dog jumped in The headliner is out waiting to be retrimmed, but it will stay out now until Nov - see why below. I replaced the stereo/headunit with a period-styled Android headunit. I have no after pics, but I'll get some. This is because of the missing pixels. I tried to fix this twice with replacement ribbon cables but couldn't. Also the bluetooth interface I'd bought for this was crap. Then there's the rusty roof. Pics and info in this other thread. I have decided to get this repaired professionally, but I'll update that thread. This is why the headliner will stay out for now. I'll be getting the roof and bonnet resprayed at the same time the rust is fixed. I also had an interesting issue with my drivers door lock.  For a small period I was having issues getting any 12v power to the car - I mean *any*. It would have no dash lights, nothing. It happened while I was at the shops and I couldn't get in the car. So, we had 2 problems. The most pressing here is that I was locked out. I have only a single physical key hole on the car, the drivers door and no amount of turning would unlock the car. Surely it doesn't need power for this? The second issue is why am I losing all power periodically, The battery isn't dead, its almost like the battery isn't even there. Two issues that were surprisingly easy to fix. You fellow BMW over-engineering lovers will appreciate this. The lock in the door has 5 states; mechanical lock, electric lock, neutral, electric unlock, mechanical unlock achieved at -90 degrees, -45 degrees, 0 degrees, 45 degrees and 90 degrees. Although, the unlock is towards the front of the car, so opposite for LHD countries. Sticking the key in and turning 45 left or right is what is used 99% of the time. It activates the central locking etc. 90 degrees is for dead battery access and, obvs, only un/locks the one door. But because the mechanical lock is never used and is 27 years old, it seizes up. I was totally unable to turn the key far enough to get to the mechanical unlock (At the time of locking myself out, I didn't even know this was a thing). I eventually did it with some vicegrips and teflon spray.  I made a quick vid for other E39 peeps.   The battery issue is totally new to me also - It wasn't making sufficient contact between the post and the terminal. The terminal was bolted on tight, but the car wouldn't have power. After checking the battery with my multimeter I accidentally contacted the terminal and the battery post and the car got power. The battery was only a few years old and in good condition. I cleaned the post and the terminal with a wire brush, bolted it back on tight and never had the issue again. I'm still surprised that despite having solid contact it didn't work. Also, the car was getting Warragamba sized pools of water in the back when it rained. My initial concern was another rust problem. But when I went out on Weds while it was raining and while I had no headliner in I could see a steady stream of water coming through the roof mounted aerial. As this aerial is for the (now removed) car phone I pulled it out and whacked a blanking grommet in the hole. It seems fine now. I'm thinking I might get the hole permanently filled when the rust is fixed. Moving forward and things in progress; The tailgate needs some attention. I have taken all the trim off to clean it all and address some small rust spots. I have partially done all of this but I'll finish it up hopefully this weekend. As all the trim are now entirely devoid of trim clips I have bought a heap of strong velcro and I'm hoping it does a good enough job as any of this trim in good condition is super expensive and usually in Europe as we dont have many of the wagons here. Suspension and brakes!!! This is exciting. In the front; New control arms New sway bar links New lower Eibach springs (the only modification I'm planning on this car) M Sport shocks (these came with the car and will replace the longer shocks in the car) New top mounts Used 540i calipers (stock brakes suck!) New 540i disks and pads (22x296 mm for 528 and 30x334 mm for 540i) New front wheel bearings (thank all that is holy for bolt on bearings!) Annnnd in the back; New control arms New sway bar links Adjustable air suspension arms (fool the car into what the current height is so the self levelling suspension can match the new front ride height) New ball joints I'll also be doing a brake fluid flush while I'm in there. I'm planning on switching the car over to the 16's that came with it so I can clean up and respray the M Sport 17's. They've lost a lot of colour over the years and have some gutter rash. None of this will start until the E90 is back.
    • You mean you will regret it for drifting duties? I don't quite follow.
×
×
  • Create New...