valve seal gaskets? that's what I ended up replacing, Loss of power, smoking, loss of mileage. Done while towing a loaded trailer over the Rockies.

But I'd do the leak down test. Time to find out exactly what's going wrong. So important to have a great dealer or indie to rely on. Sounds like yours is interested in only what's good for him..., not you.

__________________
Mark _______________________________
2001 X5 4.4i topaz blue/sand Sport, complete Dinan S2 , hitch, V1, tint, BSW Stage 1, Alpine INA-W910BT
___________
Life is not fair!
You can't protect people from their own stupidity!
Laughter makes life worth living