Why Did My Turbo Blow!?

[bad_rb20]

hey all have had exactly the same problem with my gcg highflow, in the proccess of working it out now, so will let you know salad or if u have already worked it out, if you could let me know by pm thatd be great

Nathan

[33gtst]

What do they actually replace with these high flow units? And what kind of thrust bearings do they use? old, new, 360o? I have had mutiple garrett units fail in various applications and seem to see similar characteristics in all. However am yet to see it in my trust units...just wondering if there are any noted differences here.

[R31Nismoid]

The are ball bearing.

Basically a new turbo.

[33gtst]

LOL yes, but what components are used, what thrust washers.

I do know that two b/b units built by garrett only used smaller degree thrust washers, turbos failed soon after, apparently rebuilds do not automatically qualify for the 360o thrust washer...perhaps this is the problem.

So no one can confirm exactly what is used in each application? Or if its actually brand new?

Also in the failed applications are ppl running bovs?

The added surge increases load on smaller degree thrusts, (under 360o thrusts might already be a problem in themselves) and can easily be one of the contributing factors to these failures, not just in ball bearing units, but in all turbos.

Edited December 9, 2007 by 33gtst

[R31Nismoid]

You can always ring GCG if your worried.

For the 1000's of units they have no doubt sold, one or two failed. Doesnt mean much to me.

I had a GT30 fail in less than 5,000km's. But thats just how it goes.

[33gtst]

ok so it doesnt mean much to you, but I was simply replying to what I believe might be one of the contributing factors as to why these units are failing...which is the original question, so I think it might matter to salad.

I'm certainly not worried, I have tried turbos from gcg, garrett, nissan and I will never install another garrett/or garrett supplied unit on any of my vehicles, but this thread wasnt about me.

[MBS206]

I'm still yet to see valid evidence of how no BOV actually damages a turbo.

[33gtst]

I'm still yet to see valid evidence of how no BOV actually damages a turbo.

It just seems weird to me that all oem vehicles since the early 1990's come std with factory fitted bovs..I guess they like the wank factor and have no justification for them whatsoever. I'm sure they actually have put in substancial r + d into this prior to the added expense of fitment and supply on their vehicles. However sadly I cant confirm the exact reason, I can only speculate from what I have seen and tried with my cars and my garrett dramas.

Im not saying no bov causes premature turbo failure, on its own, but perhaps when consistancies are appearing in these failures that has to mean something.

Are the thrusts unable to cope with the added surge, that maybe the 360o thrusts cope better with? Are those running a bov still experiancing the same failure and symptoms?