Subject: not sure - as with many repairs, the labor is the $$$ part Author: JohnG : member since October, 2004 : 2408 posts Posted on: 2008-08-03 15:34:50

Generally, tensioners and guides are not big $ parts, it's all the stuff you have to take off to get to them that makes the job cost a lot.

Some engines do have known problem timing chain guides or tensioners. For example, the 97-01 or 02 (not quite sure what the cutoff year is) Jaguar AJ-V8. It used a failure prone tensioner from the factory, and it is a known issue on those cars, and recommended to go ahead and replace them with the updated tensioner that is available. It's at least a $1000 job to have it done.

However, I have yet to see any evidence that the M62 and M62TU (or even the old M60) engines have a known "they all do that" or "nearly all of them do that" problem with timing chain guides or tensioners.

2001 740iL Sport Nachtblau / Blue & Ecru Highline
1999 Camaro Z28 Light Pewter Metallic / Neutral

• How common are oil leaks from timing chain covers? - 01sport 2008-08-01 16:05:01 (51 views)
  • Re: How common are oil leaks from timing chain covers? - 01sport 2008-08-06 15:29:15 (15 views)
    • NE1 have the TIS on upper timing chain gasket ? (nt) - 01sport 2008-08-06 15:30:41 (14 views)
  • +1 I did the timing chain when I did the V.C. / V.P. on my 98 740i (nt) - Lexicon 740iL 2008-08-03 12:37:12 (25 views)
    • The chain? Or the upper or lower chain cover gaskets? or the tensioners/guides? - JohnG 2008-08-03 13:03:29 (20 views)
      • When My indy (German Tech) installed my new Alty he suggested - snitch 2008-08-03 14:08:10 (19 views)
        • There isn't any tightening or aligning other than replacing the guides and tensi - JohnG 2008-08-03 14:48:26 (15 views)
          • thnx for the follow up reply. ill keep the gaskets in mond then,.How expensive - snitch740i 2008-08-03 15:12:51 (11 views)
            • not sure - as with many repairs, the labor is the $$$ part - JohnG 2008-08-03 15:34:50 (15 views)
      • Sorry, I should have specified,The upper or lower chain cover gaskets. (nt) - Lexicon 740iL 2008-08-03 13:25:37 (11 views)
  • I would do them, and here is why - bsnedeker 2008-08-03 03:06:37 (37 views)
  • just did mine too.. (nt) - paprmkr 2008-08-02 13:42:06 (16 views)
  • I guess almost common! I am having a leak now and it seem to be that. DON'T - bmw635 2008-08-01 18:46:12 (28 views)
    • I don't think the timing chain guides or tensioners are an issue - JohnG 2008-08-02 16:10:57 (28 views)
      • 6 bolts, 15min, $100 extra parts- I wouldn't skip this on the M62 engine. (url) - bmw635 2008-08-02 19:25:52 (41 views)
        • +1 (nt) - thesteve 2008-08-06 09:37:25 (6 views)
        • Close, but it's more than 15 minutes and closer to 150 in parts - bsnedeker 2008-08-03 02:57:16 (35 views)
          • What were your symptoms of the timing guide failing? Noise? - justible 2008-08-03 17:00:00 (25 views)
          • Appreciate the info. But I will definitely skip it this time around - 98K miles - JohnG 2008-08-03 10:44:44 (14 views)
      • 6 bolts, 15min, $100 extra parts- I wouldn't skip this on the M62 engine. - bmw635 2008-08-02 19:25:28 (23 views)
  • Re: How common are oil leaks from timing chain covers? - cogic740 2008-08-01 17:02:37 (34 views)