Hey Rockit - I think you are mistaking m62tu and n62 engines. They were significantly different. The chain guides are not a common failure on n62 engines, but changing the valve covers is much more involved and costly procedure. The n62 valve covers usually last much longer before they need replacement. In most cases with n62, if there just slight seepage from the valve / timing covers - just leave them alone!

X5only - did you decide on the collapsible pipe brand? Are you planning to replace water pump?

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2012 X5 x35i My new toy
2005 X5 4.4 Her's (Retrofitted Servotronic Steering Rack)
2003 X5 3.0 Mine (Retrofitted Servotronic Steering Rack and Heated Steering Wheel)
2001 M5 Son's car
2000 540i 6sp Sports pkg, supercharged. Son's car (Sold)
2001 530i (Sold)
1999 528i (Sold)
1975 2002 (Sold)