Reason why the A8/S8 has/had a timing belt rather than a chain?
04-19-2005, 09:28 AM
#2
AudiWorld Member
Join Date: Nov 2004
Posts: 415
Likes: 0
Received 0 Likes
on
0 Posts
Re: Reason why the A8/S8 has/had a timing belt rather than a chain?
weight, simplicity, noise. Timing chains need maintenance too. Either way, belt or chain, you need to R&R it once during a reasonable lifetime. At 105 K mis for the belt, or 140 K mis for the chain idler &c.
04-19-2005, 11:50 AM
#4
Elder Member
Join Date: Mar 2001
Posts: 11,968
Likes: 0
Received 0 Likes
on
0 Posts
Even American iron converts to belt drive in high performance applications.
A timing belt prevents the transmission of crankshaft harmonic vibration into the valve train, which results in more accurate valve timing.
<img src="http://www.jesel.com/images/beltdrives/beltdrive1.gif">
<img src="http://www.jesel.com/images/beltdrives/beltdrive2.gif">
<img src="http://www.jesel.com/images/beltdrives/beltdrive1.gif">
<img src="http://www.jesel.com/images/beltdrives/beltdrive2.gif">
Trending Topics
04-19-2005, 12:40 PM
#9
Member
Join Date: Sep 2002
Posts: 2,139
Likes: 0
Received 0 Likes
on
0 Posts
Is it the same config as the S4? If so maybe to save money on design or they know that most owner
will not keep their cars until it needs to be changed. I think that as with the lifetime fluids they are marketing a car that does not need maintenance. It makes it more attractive to customers that know little about cars and only want to get in and drive.
