Turbo #3

[fflyingdog]

As per title ,popped my turbo yesterday after a 'spirited' over take ,lots of smoke and a whining sound followed by a sinking heart and a depleting wallet.These cars test the patience of a saint,when they are good they are very very good but when bad....garage is of course trying to determine cause of failure i am errring towards wastegate actuator but will wait for diagnosis.

 

 

Nick S4s (less) 

 

ETA. I mean 5th Turbo not 3rd........my mind was obviously trying to be kind to me 

[Chillidoggy]

Seriously, you've knackered 5 turbos? How long are they lasting?

[Zolder]

Something a miss if you're knackering that many turbos.

[Advantage]

I've owned many, many Esprits over the years and have only ever lunched one turbo. Something is definitely not right if you're treating them as consumables.

[fflyingdog]

Yep i think the culprit(s) ,are a chipped engine and a free flowing exhaust and an over speed,but to be fair this one did last 8 years.Currently working on a solution,one being de-chipping,i did notice it was over starting to over boost a fair bit,one of those ,'i must get around to looking at that ' things.My car is like a beautiful woman when she is good she is very very good  and conversely when she s bad she is expensively bad.Suck it up and move on. (i do hope my Mrs doesn't read this) 

 

Eta .To correct appalling spelling

[Vulcan Grey]

yeah... my question is how are they failing?

 

Bearing ruined?  Shaft seized?  Seals blown? Cracked turbine housing? broken wastegate?

 

I've seen a hot lean burn crack the turbine cast iron, and cause the waste gate to snap off.

[fflyingdog]

Blades broken off the turbo Travis,obviously lucky its the hot side.

When i get a pic ill post it up.

[ragingfool35]

what would cause a turbo to fail?

insufficient oil?

poor water flow?

blocked exhaust downstream?

surging?

any other possible causes?

[cammmy]

Did the blades come off the turbine or compressor wheel?

[Barrykearley]

Always check the oil supply to the turbo when fitting a new one on any car.....

And the oil return pipe

Saves tears later if there is an issue.....

[fflyingdog]

Blade broken off turbine side,surged by the sound of it ,but awaiting tear down report,will post more when i know. 

[cammmy]

Too much back pressure?

[fflyingdog]

Not sure yet ,getting car back tomorrow so will post some pics up of damaged part.

[sailorbob]

Was the turbine wheel the OE Inconel part?

[fflyingdog]

Picked the car up today and what happened was that the waste gate rod had worn and caused itself to partially sieze under certain conditions hence causing the car to over boost and eventually destroy the turbine(see pic) .So if i had taken notice of when the car started to over boost more than previously and checked the waste gate rod with some thing as technical as a spanner i would have noticed that it wasn't  free and  smooth and not hanging up i would have saved myself a few bob.

 

 

http://s131.photobucket.com/user/fflyingdog/media/CameraZOOM-20150429120550609.jpg.html?sort=3&o=0

 

http://s131.photobucket.com/user/fflyingdog/media/IMG_1413.jpg.html?sort=3&o=1

[ragingfool35]

dubious

I would think engine damage would occur long before turbo failure if that was truly the cause...

unless it was a Chinese turbo

there are some guys on this forum that are much more knowledgeable in turbos than I however

maybe one of them will chime in

[fflyingdog]

Some times things really are as simple as they seem.

[Vanya]

How much was it overboosting? Did it peg the gauge or?

[fflyingdog]

Yes it pegged the gauge and bent the needle.

[Bibs]

I bet that was fun, for a minute!

[fflyingdog]

Yes it was running very well ,untill the point it all went pete tong,i have no idea what it was boosting but fair to say a lot.

[Barrykearley]

I reckon just at the breaking point of the turbine !!!!

Hohum - lesson for all - keep your eye on the boost!!!

[cammmy]

I don't have a boost gauge

 

In theory the ecu will step in if it senses overboost for too long?

[fflyingdog]

Thats the idea yes,but my waste gate pivot was notched and so it stuck just when i didn't need it to be.