Help with 3S-GTE again....

[Akane]

Ok I'm totally out of ideas, the story goes like this.

the adapter for my Garrett GT25R Turbo is loose, (everything else is working fine), it just needs tightening, so I took out the manifold<-adapter->turbo<-downpipe-> assembly as a whole, made new bolts and nuts for the adapter, tighten etc... while I'm at it, new drain pipe.

put it back together, 2nd day (about 100kms down the track) there was blue smoke coming out of the exhaust from time to time, so I checked, oh okay, the drain pipe was slightly long (about a few CM's), which made it a very slight U shape on the drain pipe. at this stage the intake side (the pipe from air filter to the compressor housing) is filled with oil). So i thought okay, that very slight U shape drain might upset the whole thing, I checked play on shaft, no play.

Today I shortened the oil drain pipe so it's very much vertical or flat, went out for a drive..... there is so much white smoke that'll rival a V8 doing burnouts, there are oil from my BOV, from my exhaust (dripping!) and intake (pre compressor). I check my shaft again, it's fine, pretty much no play (same amount of play as it always had).

It seems every time I "fix" something, it gets heaps worse, I don't understand how "fixing" the drain pipe can go from blue smoke now and then, to a 1.2tonne smoke machine in less than 2km of distance. Anyone can share any light on this?

[anthonym]

What's your oil feed line like? Garrett GT turbos are quite sensitive to oil pressure so you might need to install a restrictor.

[Akane]

oil feed as what I always had before (and what Matty had it), it has a hole about 3mm wide, Matty said it's the restrictor already. It's been running fine before. Oil feed has not been tampered with.

[Akane]

http://akane.orcon.net.nz/gt25r/ <-- pics here
http://www.lol.co.nz/gt25r/ <-- videos here

[anthonym]

If you are sure the oil is coming from the turbo itself, it's either too much oil pressure or the bearings are fuxored, it can't be anything else. I know which I'd rather have .

[Akane]

Ofcourse I rather have too much Oil Pressure, I'm trying to find out what's going on in there but the drain seems fine, there are a few people saying it might be the rings, but I've never took it past 0.8bar, shouldn't be the dreaded piston #3 problem tho should it?

The vids shows how much smoke it blows out.

[anthonym]

Ofcourse I rather have too much Oil Pressure, I'm trying to find out what's going on in there but the drain seems fine, there are a few people saying it might be the rings, but I've never took it past 0.8bar, shouldn't be the dreaded piston #3 problem tho should it?

The vids shows how much smoke it blows out.

If you're not certain that it's the turbo do a compression test. Yep sure is a lot of smoke .

[Akane]

Will do that over the weekend, thanks

[fivebob]

You changed the oil drain and it got worse, so the logical conclusion is the oil drain is the problem.

From the pictures you've posted, I would guess the oil is pooling in the flat section and probably getting blocked when you go around right hand corners, as the oil has no way of travelling along the flat section of the pipe of it's own accord.

Your oil drain should be as short as possible and downhill along it's entire length, ie no horizontal or uphill sections at all. You can get away with about 10° downhill for short sections, but if you engine has too much blow by, even that can cause problems.

[Akane]

the turbo had an uphill, which is a fault on my part (I didn't double check things I thought it was flat), which caused the blue smoke, then I changed it (shorten the pipe), which made it have a flat now, as I always had it for 5000kms, then all of a sudden it got worse, I've went back and check the drain again, i can't find any blockages or anything. Is it too late to "fix" anything now? Must rebuild?

[BZG Wagon]

Looking at your pic 1:

I also notice very small amounts of oil in my turbo when I take the pipe off (similar to what you have, but nowhere near as much). Is this normal? No blue smoke or anything, but I cant say I was expecting to see a table-spoon of oil sitting in there.

Did you sus out what the problem was?

[Dell'Orto]

After 3 years I think he may have figured it out

[Quint]

That oil is just blow back. Happens to them all.

I'm assuming hes asking if he figured out the problem cause hes having a similar problem

[Akane]

Yes, the problem was the owner was stupid.

[dragonx]

isnt it great that ppl do look through old posts for answers

looks like a lot of oil to me (not just a coating as i would normally expect from most turbos), nothing i stay awake at night over but something to keep an eye on.