Quote:
Originally Posted by Wahooz
Sorry to revive such an old thread, but currently in the process of doing valve seals on my 2007 4.8 E70 and using this as a guide to help. In any case, I'm a bit confused by the original posters statement:
"when removing Vanos Actuators: if you do not have a computer to release the tension the actuator has on the adjustable cams, remove three of four bolts, hold Actuator and remove the fourth bolt, expect the cam to fall off of the actuator as you try to move it and get it out of the valve cover."
The part I don't understand is "expect the cam to fall off the actuator". Is there some sort of small cam as part of this assembly? By looking at it, it appears the screw drive of the actuator simply turns the gear on the cam...so not sure how the cam falls off?? That said,when I removed the actuator on the pass side (Bank 1), I did hear something drop into the head, but could not find anything in the head after the cover was removed. On the Driver's side (Bank 2) there was no sound of anything dropping. Any help in clarifying this would be greatly appreciated!
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My turn is coming up on my '08 4.8i. I have been putting off fixing my badly leaking valve covers as I know I have to replace the valve stem seals. Now, just recently, I have begun loosing coolant and the leak source has not become obvious. I suspect coolant pipe or valley pan. Regardless, i need to suck it up take care of all these tasks at once. About 128k miles.
I think I am procrastinating as I have done the valve stems before (on my E60) and recall how miserable the task was...18 hours just on the valve stem seals. Oh well...got to do it all just like on my E60.