Date: Sun, 03 Sep 2000 21:10:10 +0100
From: J <johsnopsamsafish.com>
Subject: Re: Hydraulic valves tappets


The owners manual of my 93 9000 says: "In certain conditions the hydraulic cam followers may emit a ticking noise that can be heard inside the car. This is most likely immediately after starting, before the oil pressure has reached its normal level. It is also possible for air to enter the lubricating system when oil or oil filter is changed or the car has been left standing for a prolonged period. In this case the ticking noise may be heard for as long as fifteen minutes, but again, this does not indicate any malfunction. However, do not exceed 3000 rpm until the noise has disappeared" This should do for explanation. However, the ticking noise is often misunderstood, and I have seen motoring journalist warning against this noise in their columns for buying secondhand Saabs. Johannes "a. nijhof" wrote: > > The other I bought a 1991 900 16V2.1l with approx. 256,000 km. When cold the > engine produces a lot of noise which, I assume, is caused by the hydraulic > valve tappets. It sound like a diesel engine. After five to ten minutes the > sound becomes rather normal, after 15 minutes it sounds normal. The guy how > sold me the car said it could be no harm, but on the other hand the Haynes > Manual says that the tappets have to be replaced occasionally, so what to > do. > Thanks in advance for any information.

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