Date: Sun, 11 Jun 2000 18:45:35 -0700 From: "JoeBeets" <MelBaynopsamt.com> Subject: Re: 1987 Saab 9000S
I'd be looking at the engine mounts and the exhaust first. A compression test would find poorly sealing valves due to a weak or broken spring. Unlikely, since it idles well. Lack of power can be caused by incorrect timing, which would be associated with higher engine temps. -- :-) "TSG" <solis1nopsam.com> wrote in message news:0tn7ks8ugaqjjripr5doflc5utj0nllkibnopsamcom... > Hello, all: > > Yesterday I was accelerating up a highway hill at about 70MPH when I > got an odd 'thump' from the engine compartment. > > Now, the area of the engine closest to the outside has always had an > unusual amount of 'chatter'. I thought it was a noisy valve spring. > > The sound is not constant, but pseudo-regular when you do hear it. I > also notice that the tone of the exhaust is different -- much lower. > > I've only owned this car for about six months, and fell in love with > it. > > The car starts fine, and idles rock solid. All of the gages show > normal activity. It still seems to run fine (that odd noise does > kick-in at random), but lacks as much power as it had.... > > So, any ideas anyone? Could I tell externally if there was a broken > valve spring by sound alone? Can I just open-up the valve cover > gasket and take a look? Exactly what am I looking for, anyway? > > Any tips will be appreciated. > > > RS > >
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