Date: Tue, 29 Jun 1999 20:23:59 GMT
From: (Andrew F. Dicker)
Subject: Re: Turbo Care

>>A friend of mine told me to let it idle to "cool down" after extended use >>such as climbing and twisting around the Rockies (naturally giving me a >>tremendous adreline rush!) ------------------------------------------------------ >Well, when I collected my 9-5 I asked the dealer the same questions. >He said just to forget that there was a turbo under the bonnet and it would >probably outlast the piston rings. > >Letting it idle for a while to cool down the turbo used to be necessary for >the high boost ones which used to glow red-hot after a strenuous session, >but apparently is not needed for the low boost models. ---------------------------------------------------------------------------------- I'm sure there are those out there more knowledgeable than myself but I believe earlier models required that the engine be running (presumably at idle for a "cool down") to keep oil flowing through (around?) the turbo to "bleed off the heat". My brother was instructed to let his '86 (?) 9000 idle after hard driving rather than to just switch it off. By the time my '93 9000 was made Saab had altered things so that a proper cool down occurred even with the engine switched off (presumably pumping oil around the turbo without the engine on and until a temperature sensitive switch allowed this "auxillery/'new'" system to switch off). This is one case where one set of advice does not fit all models/years. Best to know how 'your' turbo functions; someone out there may know the year switch over (I presume they did the same thing for 900's). By the start of the 9-3 & 9-5 models "auto-cool-down" had been standard for years. -Andy

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