Thought it may be interesting to see some photo's of real faults & damage that can occur to your zed rather than hypothetical conversations, also may be fun to have a guessing game, take a look at the following photo's, and see if you can guess what went wrong.

 

Have loads of these and hopefully will of interest for members to see what really transpires when these varied faults occur.

 

The background to this particular fault is as follows, a rebuilt engine from a small company with in house engineering cnc machining, heads and turbo rebuilding facility.

 

Car was collected from said builder and around 60 miles later the following was discovered after an engine noise was heard and seem to be getting worse, the noise was semi metallic with a scrapping noise in time with engine speed.

 

 

 

 

 

 

 

 

Jeff TT

Ok another poser for ya, take a look at the spark plug with the bits missing, see who can guess correctly how the damage occurred and why, it may not be quite what you think.:x:

 

 

Jeff TT

Edited January 21, 200916 yr by JeffTT

Is this a cause of Detonation ? and / or over boosting :confused:

Edited January 21, 200916 yr by zogg

is it a pre ignition fault caused by fuel octane to low and mixture to week

Mechanical damage

 

ie- foreign object in combustion chamber?

wrong plug

Excessive heat or timing too advanced?

All kind of right, yes it was caused by det but why did it det so bad that it needed the following.

 

 

 

 

 

Jeff TT

Edited January 21, 200916 yr by JeffTT

Turbo boost too high ?

Turbo boost too high ?

 

 

Oh your all so close your so ALMOST there, Ok 21psi with a standard ecu, the cylinder the plug was in had 0 psi compression, bits from the cylinder had gone through the turbo, replacement engine too then:(

 

 

Nice one Tony and shared with Zogg too

 

 

Jeff TT

Remember the corroded floor? the end result after welding

 

 

 

 

Jeff TT

Ok try this one, foreign object can be just seen down the drivers side turbo as viewed from above, the engine was not boosting well.....at all.

 

Guess what it is?

 

 

 

 

Jeff TT

Compressor wheel fell off?

Ohh good guess.........but wrong :D

 

Jeff TT

I can't quite make out where/what it is! Maybe I'm being thick :D

Is that the turbo outlet pipe (compressed air)?

Is that the turbo outlet pipe (compressed air)?

 

Yes the one that goes to the intercooler.

 

Jeff TT

A blade off the compressor wheel?

A blade off the compressor wheel?

 

Nope, another clue is the turbo`s had been recently changed.

 

Jeff TT

could it be part of a gasket

part of turbo bearing/thrust collar? or wild guess wastegate flap (but thats exhaust side so cant be or can it?

Edited January 21, 200916 yr by j1mmytt

Piece of tissue or paper used to block of the intake.....

could it be part of a gasket

 

WINNER :dance::dance::dance:

 

 

 

 

Jeff TT

.....

Sorry should explain, the gasket must of become dislodged when the new turbo`s were fitted by the owner ( yes he did it ) and when the bolts where tightened it crushed the gasket between the flanges.

 

The engine performance was returned to what it should be, now the turbo could spool up and the flange was not leaking.

 

 

 

 

Jeff TT

Remember the corroded floor? the end result after welding

 

 

:shock: