when to change timing belt - unknown service history - AudiWorld Forums

Go Back  AudiWorld Forums > Audi Models > Audi A8 / S8 > A8 / S8 (D2 Platform) Discussion
Reload this Page >

when to change timing belt - unknown service history

Notices
A8 / S8 (D2 Platform) Discussion Discussion forum for the D2 Audi A8 and S8 produced from 1994-2002

when to change timing belt - unknown service history

Old 11-17-2018, 09:20 AM
  #1  
AudiWorld Member
Thread Starter
 
Join Date: Jul 2013
Location: south jersey, near Philly, USA
Posts: 189
Default when to change timing belt - unknown service history

1997 A8Q. Bought it with 183k miles on it, fixed the trans and have put another 4k on it. No service records.

Any way to tell how old the timing belt is or what condition it's in? Should I change it now? Refrain from any more full throttle blasts till I do? What breaks them?
hillpc is offline  
Old 11-17-2018, 11:21 AM
  #2  
AudiWorld Senior Member
 
Join Date: Oct 2005
Posts: 856
Default

My 4runner 3.4 had 180K on it when I bought it. Original timing belt, original spark plugs. Very clean oil though, the PO changed the oil very regularly. Anyway the timing belt was pretty leathery but didn't really show any cracking or anything obvious. Conversely I just did the belt on one of my 968s, not a lot of miles on the belt (maybe 20K) but I had the cams out for variocam service so I put in a new belt. That old belt did not seem new or anything. If somone handed it to me I do not think I could say it had 20K or 100K on it or what. Maybe there is a way to measure the thickness of the belt (at and between teeth) and compare to new? My A8 belt has like 75K on it and my S8 belt has like 8K on it so I could compare mine.

An S8 with 180K or so on the original belt just tossed the belt recently so I would not want to run past maybe 140K on a belt, unless the car's not really worth putting time and money into.
I know on the 40v you can usually tell if the belt has been serviced, toolmarks and the like. Maybe if it looks like your belt has been done you'd figure it has at most 100K on it and is probably OK for the next 20K or so.
But if you intend to keep the car you'll probably do the belt and only do it once so why wait?

(the 4runner spark plug gaps were 2x the OEM spec, most of the electrode worn away, but damn if the thing did not run fine and ran the same after a full service, same MPG also.)
jfrahm is offline  
Old 11-19-2018, 06:11 AM
  #3  
AudiWorld Member
Thread Starter
 
Join Date: Jul 2013
Location: south jersey, near Philly, USA
Posts: 189
Default

Yeah, you make a point; I do intend to keep the car. Major and costly engine damage could change my mind, so I should just prepare to do it this winter.

Modern ignition systems will fire a spark across enormous gaps; I like it!
hillpc is offline  
Old 11-26-2018, 07:53 AM
  #4  
AudiWorld Senior Member
 
Join Date: May 2003
Posts: 1,083
Default

When I bought my 01 S8 a couple years ago it had about 180k miles on it. I assumed the belt had been done once and was due again (causing the owner to sell when they got the quote from Audi service). Wrong, it had never been done and was missing multiple teeth. Eek. One of the many benefits of buying a car with an unknown service history...

Change the belt asap for piece of mind. It's about $500 in parts for the whole service and takes 1 day.
JAA 4.2 is offline  
Old 11-26-2018, 07:01 PM
  #5  
Audiworld Junior Member
 
Join Date: Feb 2015
Posts: 6
Default

You should be able to remove the driver front timing cover with 2 hex bolts, simple. You can then inspect the belt, and I'm guessing it wasn't done. Interval is 80 or 90k so I'm figuring he didn't do it because they'd likely have told you. If it was just done, it'll look pristine. Maybe roll the motor over with a big socket on the harmonic nut and a breaker bar, and see if you can see the label on the belt? Also if the timing parts are all rusted to hek, odds are they haven't done the belt. In that case, you're running on borrowed time.
elaudi is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Junker CQ
Audi 90 / 80 / Coupe quattro / Cabriolet
12
02-19-2009 07:25 PM
toronto1234
Canadian Discussion
2
12-02-2008 09:22 AM
mywifescar
TT (Mk1) Discussion
12
09-21-2006 09:33 AM
mxp
S4 / RS4 (B5 Platform) Discussion
2
07-13-2006 06:20 PM
ND4SPEED
A4 (B5 Platform) Discussion
3
02-26-2002 04:43 PM


Thread Tools
Search this Thread
Quick Reply: when to change timing belt - unknown service history


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: