What causes this?

[quadracer111]

A td05 turbo from my subaru, exhaust side. What made my engine blow up...

Anyone have an idea how this happens? Is it simply heat and age?

[Skym]

Could be the metallurgy. Or that piece of metal was machined too thin and exhaust swinging too much on it. A flexi placed in front pipe should help stop it from happening again. Or exhaust manifold, turbo, exhaust got too hot due to rich, retarded tune (antilag???) and combo of the above.

[Snow]

Sorry so you blew the engine then?

[quadracer111]

It got a nasty knock... I found a longblock with 56k on it and had it swapped, it runs stronger than the old engine ever did. Also a new turbo.

[M13]

your exhaust was swinging and that cast piece couldn't handle the weight swinging back and forth.

How does your engine blow from an exhaust leak though? Looks like you had the knock issue and lean issues that also contributed to this crack (making metal weaker due to high temps)

This wouldn't cause engine to blow lol.

[quadracer111]

Lost most of my oil on the highway. By the time I got home it was knocking. Positive the seal went too, all my oil went out my exhaust pipe.

I checked out my exhaust, it's not swinging or hanging. It's all tight.

[derk]

thats the compressor housing of a TD05, the exhaust swinging would have no affect on that, as that is clamped to the center section by a v-band.

so was this the turbo from the old motor? or did the new motor blow up?

[quadracer111]

This turbo was on the car, and it cracking/blowing the seal made the engine develop a knock due to lack of oil. I swapped in a longblock and new turbo. Car is running great now. Just wondering what would of caused the housing to crack like that.

[M13]

ya losing oil like that will blow up the motor also.

[Bugsly17]

That didn't blow your engine.

Looks like there may have not been enough support on you exhaust system. Too much weight on the flange. Heating up and cooling down so much, weakened it, and it cracked.

[derk]

there is no weight on that part of the turbo, thats the compressor housing, not the turbine housing, even if the exhaust wasnt secured, the weight would be taken up by the turbine housing, and the up pipe.

plus, the turbo is also supported by a bracket that is bolted to the block and trans on the EJ20G.


weight had nothing to do with causing this to crack

[M13]

there is no weight on that part of the turbo, thats the compressor housing, not the turbine housing, even if the exhaust wasnt secured, the weight would be taken up by the turbine housing, and the up pipe.

plus, the turbo is also supported by a bracket that is bolted to the block and trans on the EJ20G.


weight had nothing to do with causing this to crack

he did say it was the exhaust side, so I didn't look @ it much.

It is compressor side as you say. However, I have seen some exhaust housing damage due to the exhaust swinging around.

[Skym]

Same, I thought it was exhaust side.

[quadracer111]

It is the exhaust side.

Oil was lost, bearings were spun, engine was removed, new engine and turbo was swapped in, and it is now running great.

The exhaust is secured no differently than stock...

[Skym]

Stock exhaust is heavy (at least on a Skyline it is). On a R32 GTS-T Skyline it's around 20-24kg or so when I last weighed the stock exhaust. Then add lateral G forces when cornering. Titanium exhaust is roughly around 4kg or so (might be slighly heavier, depending on diameter, etc). Pushing on end / tip of exhaust with foot or similar shows you how far it can swing.