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Old 12-31-2012, 09:34 PM   #291285
briangl92
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Join Date: Apr 2010
Location: Scotts Valley
Posts: 9,515
My Ride: A08 ZSP ZPP SULEV
Quote:
Originally Posted by cyberkaa View Post
They drive really well. Smoother and peppier than M54s. Later ones are better than earlier ones.
Early heads had issues with oil flow to lifters (similar to M52s and some M54s) but later ones got updated lifters and then updated heads. Early head bolts were also prone to breaking.
The Valvetronic system is probably the most unreliable part, especially the eccentric shaft sensor. Requires taking the valve cover off to change it, which is a lot more annoying than an M50-series motor, but not the end of the world.
Thanks! All in all, would you say more reliable than the M54/6? That Valvetronic issue sounds like the VANOS seal issue in terms of complexity and annoyance lol Is it a maintenance thing or something that goes out?

Do you know about the 4.8?
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