Quote:
Originally Posted by andrewwynn
I think 4.4 went to n62 ≈ 2004 so the big ticket maintenance will be valve stem seals. They seem to fail between 80-120,000 miles. If you are decent DIY you can do that yourself and I'd change the seals on the valley pan pipes at the same time.
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You are correct. The N62 arrived with XDrive with the LCI in 2004. FWIW, I think age may also be a factor on the valve stem seals. We had to do our '04 4.4 N62 last Fall at less than 60k miles. That one stung a little. My '04 4.8 N62 waited until right at 100k around 2017 or so.
I'm at 189k now, and she does get thirsty for oil, but no smoke at idle. I would guess about a quart refill is needed every 1,200 miles depending on driving style or if I have anything in tow.