i think i might have a valve stem problem as it burns oil like fuel when its reved it smokes white /grey smoke could this be vale seals

isit possible to change the valve stem seals with the heads left on 4.6 v8 as i did change seals in the past on a 2.8 xr4x4 with the heads on by putting rope down the bores to keep the valves up.

could be lamba how do i know if there is a fault

air filter is ok it looks new as for the colour of the smoke it looks white/grey could it be hgf not sure as the smoke lingers for a while

really dont know what to do need help on my emissions it failed its mot a few weeks ago on emissions was told its the catalytic so replaced the cats and middle box changed the oil and plugs no good still smokes its tits off it dont smoke on tick over but when reved to 2500rpm it starts to smoke...

1997 p38 i dont have any radio fitted in the car and the steering wheel controls dont work cannot get cruise control to set/work is this due to not having the standard radio fitted regards gaz.

but they should have the holes for the lambda sensors hey dont want to buy them without and have to drill holes and weld nuts on to take the sensors.

thanks pepole for your replys mine just has the two sensors the catalytic shape looks a little diffrent on flee bay to mine but hey if it does the job and gets it through a emissions test i dont care will have a look at my sensor thread size tho.

dont know how to paste link ebay number 200690257443 some others i have looked at on the site have diffrent lambda sensor sizes

need to order new catalytic converters for my 1997 4.6 hse v8 petrol but some on flee bay say none obd my car has a obd plug under passenger side does it matter if i order one with or whithout obd whats the diffrence none obd are cheeper i do have lambda sensors.

wanted p38 radio for my 1997

cats and center exhaust wanted p38 4.6 1997 mine has obd fitted

will the 4.6 smoke if its not running on all 8 need to get to the bottom of this mot emissions fail.

the thread lenghts are diffrent so that must make a diffrence to the engine running

will it cause running problems with diffrent plugs

just pulled them all out all diffrent

diffrent plugs in each bank

went to check the plugs out as it failed the mot on emissions and look pic to follow

plugs are black and sotty