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: Noisy 2.0 16v engine



tkohonen
09-17-2000, 02:06 PM
I have 9000i '89 which has now 312 000 km. I have had the car for 20000km and the biggest worry so far is the engine noise. When cold, it makes a rattling (diesel-like) noise. In the normal temp the sound becomes smoother and more quiet, but still the engine noise is somehow coarse with tick-tick-tick sounds. The idle also wanders between 820-880 rpm. I'm not satisfied with the cars performance (I have reached 182km/h), even though I know it never has been a racket, should have bought the turbo... But what might be the cure for these sounds? Timing chain or something bigger and more expensive? Are there any products (e.g Forte engine flush), which might prolong the engine's life? The car has had Shell's synthetic oils which has been changed after 10000km, and it is otherwise in top condition to be almost a 12 years old car.

Thanks, Terho

Guest
09-21-2000, 01:34 PM
Sorry to say this.... but it sounds similar to the noise my 9000 2.3 CDS engine(see thread) was making before it expired. My advice is cut your losses and see a specialist immediately

Guest
09-21-2000, 01:34 PM
Sorry to say this.... but it sounds similar to the noise my 9000 2.3 CDS engine(see thread) was making before it expired. My advice is cut your losses and see a specialist immediately

john
09-21-2000, 05:37 PM
the thread that kpatchett refers to is http://www.saabs.co.uk/ubb/Forum2/HTML/000036.html

HTH /john

ts
09-21-2000, 06:24 PM
Don't give up just yet!

It is most likely your haydraulic tappets. These rely on a constant supply of oil to keep them pumped up. As the engine gets older, the tappets get worse at retaining the oil, and the oil ways that supply them get clogged up.

First, clean your oil ways. I use Wynn's engine flush every 20k, and it seems to work. Add to oil, idle for a while, then change oil. Also, remove the valve cover, inspect and clean the two oil pies at the top. The plastic unions between them get old and crack, reducing oil flow to the tappets. While you have the cover off, inspect the chain for wear and tension. They ver rarely fail, although the tensioners do.

If this has not fixed the problem, you need to determine which of your tappets need replacing. Do this by applying finger pressure to them There should be no give in them.

If you need more info on how to do this, just ask.