Blue smoke

Summertime last year It started to kick out blue smoke when i got to the bottom of hill once I put the throttle back on,
The mass airflow sensor was replaced a year ago
So given another full service and changed air temp sensor cam filter and breather housing still the same
So last month i put 1 litre of Lucas treatment in the oil (after another service)which was supposed to soften the valve stem seals and prevent oil bypassing
It has started to belch out blue smoke more now even on lesser hills heading home
So I've stripped down the whole Intercooler system cleaned out the Intercooler and Intake manifold till spotless replaced all the intercooler hoses inc the air temp sensor also the Turbocharger boost pressure sensor on the side of the intake manifold and renewed all the manifold seals took it for a long run to get it hot to see and it still smoked like mad coming down the hill.
I have also replaced the centre pipe and catalytic converter 2 months ago
Spoken to local dealer mechanics who have not encountered this problem ??

What milage has the motor done? Has it been well serviced and routinely?

It's burning oil. Valve seals are likely but could also be worn valve guides. Or worse worn bores. Is the induction system in good order, no holes / leaks - air filter clean and a good quality one?

Could also be worn oil scrapers on the Pistons and dodgy turbo seals

freelance said:

Could also be worn oil scrapers on the Pistons and dodgy turbo seals

Click to expand...

+1 - re turbo - any signs of oil from the exhaust tail pipe? Faulty turbo seals / dying turbo will have oil in exhaust - usually quite spectacular! especially the mess!

Its not the turbo ,turbo seals going clouds of white smoke heavily smelling of oil
Last one I saw like this valve guides worn, One before that bore wear plus broken ring you need to do compression test,
sorry

Cheers for the responses
Mileage is 127000
Been serviced with land rover genuine parts every 4-6000 since I've had it from 3 year old out of L/D dealers

what crank case vent is on the car? is it the TD4 engine, if so you can use the BMW breather unit, doesn't clog up and much more efficient than the original one. The reason i say this is because it allows the build up of pressure in the engine to escape safely and if it gets clogged the pressure goes to the next weakest part of the system, ie, the turbo seals. This puts oil in your intake making the blue smoke. I'm not sure about the older diesels if that's what you have but it might need a replacement breather. I know its been serviced regularly but might be an idea to check it, especially as its cheaper than a new turbo or a turbo core.

https://www.youtube.com/watch?v=hAz-yMKTmwY

usually on the over run it is put down to either piston rings or wear in the bore

openfold said:

what crank case vent is on the car? is it the TD4 engine, if so you can use the BMW breather unit, doesn't clog up and much more efficient than the original one. The reason i say this is because it allows the build up of pressure in the engine to escape safely and if it gets clogged the pressure goes to the next weakest part of the system, ie, the turbo seals. This puts oil in your intake making the blue smoke. I'm not sure about the older diesels if that's what you have but it might need a replacement breather. I know its been serviced regularly but might be an idea to check it, especially as its cheaper than a new turbo or a turbo core.

https://www.youtube.com/watch?v=hAz-yMKTmwY

Click to expand...

Sorry to say that blue smoke symptoms are not a sign of turbo problems they are a sign of bore or ring wear or valve stem seals or valve guide wear.
Worn turbo seals in early stages produces light white smoke on overun this rapidly changes to the death of your turbo if you do nothing in huge clouds of white smoke as it revs itself to death only thing to do stall it in 5th.

Best way to check overpressure in crankcase take your dipstick out whilst engine running if it blows oil you have trouble either with crankcase breather or engine wear!
Have an electronic compression test done.