sdv6 oil leak

[werner5]

hi guys not sure what to change any more i have a disco 4 3.0 sdv6 oil keeps running down at the back where engine and gearbox meet i have changed the following

oil cooler
both intake manifolds
already checked no oil in the v

still leaks but only when you drive it at high rpms if you drive slow till about 2800 rpm then no leaks when you hammer it a small streak of oil starts running down the rear side of engine... its a righthand drive oil runs down passenger side rear but only when driven hard

any ideas where i can look next

[RANDLOVER]

Just guessing as I have no experience of such a leak, turbo oil supply or drain lines.

[Eric SDV6SE]

Yup, check the turbo oil drain line, underneath the turbo snaking down into the block. Pita to get to, a genuine gasket and perhaps a new oil drain pipe, as the flange on the line can distort over time due to heat cycling.

Also, the line can get blocked with sooty sludge over time, this then forces oil out past the sleeve bearing of the turbine shaft. If youre lucky, it goes outside, otherwise it ends up going down the exhaust and the car starts to blow smoke as the oil burns. It can also damage the catalytic converter.