Chances are that everything will be ok with a flush through, but you don't
say if the garage is a bmw dealer or not - the dealer policy would appear to
be not to flush but to replace pumps, injectors, lines, catalyst etc, but
the intercooler will DEFINITELY NOT be affected.
I strongly suspect that the turbo will probably survive ok as well, they can
survive running whilst glowing cherry red on some performance petrol engines
when at max chat, so I seriously doubt that a little bit of petrol getting
into the diesel system and stopping the engine would do any harm to it!
There's more chance of the petrol causing insufficient lubrication of the
high pressure injector pump and consequent damage, but even that is rather
unlikely unless you were at max chat when the petrol got drawn through.
I think your garage is probably "extracting the michael". If it were mine,
and it wasn't under bmw warranty and already at a main dealer, I'd instruct
them to fully drain and flush the whole system and change nothing until you
see how it runs. The cat may be affected by having petrol combustion
byproducts fed into it, but it also may not.
Thanks Badger your analysis seems logical. When an independent engineer
looked at the car he confirmed traces of petrol, but only after looking
The car had been filled with 45 litres of diesel before it went pop, so any
petrol was certainly in the minority.
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