Reboring /sleeving 740 4.4 engine
Rex B wrote:
> Cords wrote:
> > I had unfortunate incident at a BMW dealership. Whilst sevicing My 1997
> > 740 4.4 litre the technician accidently dropped the screw top of the
> > spark plug into one bore. Needless to say on start up destroyed the
> > head and scored the cylinder. The dealership now wants to machine the
> > bore and put in a metal liner.
> > Is this possible on a aluminium alusil engine?
> > I would have thought the correct thing to do would be to replace the
> > block or the entire engine!
>
> You have a right to demand the car be returned to the same condition as
> you brought it in, plus the work you paid them to perform. Iron
> sleeving one of 8 alusil bores is NOT making you whole. You need a new
> or factory reman engine, or a salvage engine of equal or lower miles,
> and a guarantee with whatever they install. Do not let them sleeve your
> motor.
> While the piston is likely peened a little, the rod is probably OK.
> But the combustion chamber in the head is also suspect.
> A lot depends on the miles on your engine as to what might be a fair
> replacement, but I'd assume the factory engine is good for 200K miles.
> If you have had that car for 9 model years it is a reasonable assumption
> that you intend to keep it for several more years.
> It sounds to me like they are trying to not file an insurance
> claim. They carry insurance for just this sort of thing, but of course
> their claim history affects their rates and future insurability.
Thanks...my thoughts exactly!...They talk about replacing the head with
a second hand one which they will check. The Car has only done 62 000
miles and all long distance so the engine was like new...very
Disappointing to say the least
|