Leon Blew Up !

[autohouse]

Hi there, I was wondering if any of you guys could help me out here incase I am missing something obvious.

2004 ASV engine.
Customer complains of MIL on.
Plugged VAGCOM onto it and found fault relating to EGR valve loss of pressure.
On checking out vacuum pipes, found one off the valve that sits on top of the manifold that links onto the air operated valve on the butterfly flap.
Replaced vacuum pipe and reconnected.
Customer also wanted towbar fitted so done that.
Cleared faults, took a test drive and engine fully reved and threw leg out of bed !!!
On inspection of the turbo, the fins are still intact and no movement and not a huge amount of oil in intake syatem so not sure if its been turbo failure related or not ?

Any ideas of why this could of happened ?

 

[MJ]

elaborate on "blew up" mate.

 

[DPJ]

Did the engine rev itself, or did you rev it?

 

[MJ]

Did the engine rev itself, or did you rev it?

If it revved itself then it might be loosing oil through a seal and burning it as fuel - never good or fun to watch!

 

[DPJ]

If it revved itself then it might be loosing oil through a seal and burning it as fuel - never good or fun to watch!

That's where I was going

 

[MJ]

i caught your drift mate and thought i'd but-in

 

[autohouse]

As far as "blew up" is already explained in "threw the leg out of bed" as in the piston rod came out through the engine block as far as seals leaking and using oil to run on herself, there is no oil in the turbo and the bearings and fins are intack still and no oil in the intercooler or intake pipes plus oil is still correct on dipstick. And NO, I didnt rev it, it done it itself

 

[jabbasport]

Definately injested oil, uses it as fuel which means even if you switch the engine off it'll still rev on eventually throw a rod out of the block etc etc..

Only other place oil could have come from is possibly breather if engine was overfilled???

We had a customer who was quite elderly, used to always over fill his oil when he serviced the car which eventually filled the intercooler up. Bought it in to us for a brake fluid change, technician put his foot down and engine injested the oil, luckilly managed to stall it in 6th.

Definately running on oil..

Kev

 

[autohouse]

Its the only thing that I can think of too but it was just incase these engines had a problem with electronics or something inside the diesel pump that gave bother. Bit of a hard one to explain to customer all the same ! Buggering car trade lol. Costly test drive for me but thats just my luck. Thanks for the input folks

 

[muddyboots]

Maybe somehow the vac connections were wrong, and permanent vac was applied to the turbo VNT actuator, causing it to wayyy overboost when engine & turbo speed got high enough, and self destruct before the ECU had time to get things under control ?