Thanks for all your comments guys, here's some resposes and further thoughts:

Yeofeng, I read on other posts that the hydraulic lifters can take up to 15 mins to bring the oil up, but the fact that it suddenly started making the noise - and for so long - scared me. I drive home for lunch and even starting the car after lunch still makes the noise until the temp gauge shows fully warmed up, so if it was the lifters I would have thought they would have enough residual oil remaining from when I got home 30 mins before, surely?

Turbo, your suggeston re the exhaust manifold is intriging as I have had a "turbo whistle" (leaking joint at turbo/exhaust manifold)for the last couple of months, more noticeable when cold, so it could well be related to that I wonder. At my last MOT they said they had to weld up the exhaust manifold a little, but it didn't seem to stop the whistle, so I guess they just didn't do it enough, so I will pursue that line of investigation.

Street, you asked what oil I run, I use semi-synthetic 15W-40. I did not use flushing oil, I did a normal oil change + filter, then a week later, I changed it again. That was in late feb.

Chaz and 2_Terry, yes it is probably time to have the chain/tensioner etc done but I would do that to make the engine quieter when idling as it is a little rattly, but I imagine that a worn chain/tensioner would always be noisy, rather than only be noisy until the engine is fully hot.

I forgot to mention previously, the car has just clicked its odometer over the 183,000 mile mark, officially the highest mileage Saab I have owned!

I'll check out the manifold and see if I can resolve and I'll post results.

Many thanks guys, at least it doesn't sound like something expensive about to let go! :-)

Kind regards to you all

Andy (West London)





posted by 82.43.13...

• Weird one for you - tappets type sound until fully warm, Andy (West London), Sat, 28 Apr 2007 15:26:00
  • Re: Weird one for you - tappets type sound until fully warm, chimdysaab, Sun, 29 Apr 2007 21:13:13
  • Thanks Guys, more info, Andy (West London), Sun, 29 Apr 2007 15:20:29 <-- Viewing This Message
    • 15w40 sounds a bit thick. I use 10w40 summers..., Chaz, Sun, 29 Apr 2007 15:51:03
      • thanks Chaz, would 5 degrees make such a difference?, Andy (West London), Sun, 29 Apr 2007 16:02:08
        • It is a complicated terminology..., Chaz, Sun, 29 Apr 2007 16:21:42
          • be careful with 10-40, KenManiac , Sun, 29 Apr 2007 18:57:47
            • Exactly what I was recommending KenManiac, Chaz, Mon, 30 Apr 2007 03:50:35
  • Re: Weird one for you - tappets type sound until fully warm, yaofeng, Sun, 29 Apr 2007 06:15:50
  • Did you have the problem before the oil change/flush?, Street, Sun, 29 Apr 2007 06:06:14
  • Possible answer?, turrbo , Sat, 28 Apr 2007 18:23:08
    • Several potential answers..., Chaz, Sat, 28 Apr 2007 19:39:57
      • one last one. Timing chains get old and stretched, Chaz, Sat, 28 Apr 2007 19:40:53
        • Totally agree with all those, turrbo , Sat, 28 Apr 2007 20:39:25
          • definately timing chain noise, 2_terry, Sun, 29 Apr 2007 03:28:46
            • No offense, but I think your problem is mechanical..., Street, Sun, 29 Apr 2007 06:11:18

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