Hi I have a  x 5 2002 year it was fine until a couple of weeks ago i noticed blue smoke from exhaust also the kick down has stopped working the fuel filter was fuel of muck i fitted a new one i have had it for 5 months until then it went very well i have been very pleased with it can some one please give me any idea what has gone wrong with it please. thank you Alan   

Morning Alan

Welcome to the Forum

A little help to narrow things down, what model petrol or diesel. if petrol which engine 3.0, 4.4, or 4.6 has it been LPG converted. How many miles has it covered? Does it have any service history/

In general blue smoke is oil burning off which could come from a number of sources, worn valve stem seals, clogged EGR system, vacuum leaks there is quite a list. As for your kick down issue the poor old gearbox rarely gets attention until it is causing problems 2 boxes were used (1) GM 5 speed on the early X5's then (2) ZF. I doubt the gearbox has ever had a service as BMW in their wisdom stated "sealed for life" which really meant the end of their warranty (60k) So it could be that you disturbed a connector when changing the fuel filter, it could be low on gearbox fluid by the way there is a gearbox breather that enters the engine bay I did read where someone connected it to the EGR by error thinking it had come loose the result was fluid sucked out of the box and clouds of smoke.

I would get the box serviced by a specialist if you can't do it yourself or at a minimum get the box codes read. If your doing fluids don't forget the diffs and transfer case.

Dave

Good morning Dave it's diesel 3 LT the smoke just started there had never been any smoke before it was not used any oil it has done 173000 miles the kick down and the blue smoke started at the same time some one told me it could be the turbo. I doubt know if that helps also the gear box was smooth to change gear and still is.Thank you for any  help you can give me. Take care Alan 

Morning Alan

At 173k the turbo is quite a high probability, seals wear particularly if at some point in it's life it has some gaps in service. If the turbo actuator is suffering that could also cause kick down  issues.

A refurbished turbo for my sons Toyota pickup cost about £200 and we fitted it on a Saturday morning.

To make it easier check www.realoem.com put the last 7 digits of your Vin in the search box and get the part numbers to make sure you get the correct Turbo also make sure you get all the gaskets and seals it would be unwise to try and change it without.

Dave

Thank you Dave that would be my next move. Take care with our covd19 going around.Alan 

Same to you Alan

As we are well into the "at risk" age group we have been taking care of where we walk the dogs and exercise the Horses, having 5 dogs is a help people tend to avoid us 😁

When your changing the turbo swap the manifold for a cast one if it hasn't been done much better and reliable. www.newtis.info will help with "how too" and other information if you are not aware.

Stay safe 

Dave