Date: Mon, 28 Jun 1999 13:56:32 -0400
From: "Eric R. Sterbenz" <>
Subject: Re: Turbo Care

Peter, The term "cool-down" is actually a misnomer. What you are actually doing is letting the turbine "spin-down". The turbo under pressure spins at 100K+ rpm. What you are doing during the idle period is letting it slow down before cutting off the pressurized oil feed to its bearing. Its not so much a temperature thing as it is a lubrication thing. I believe the "spin-down" period is a wise precaution for any turbo to prolong its life, and it really doesn't cost anything. Peter Wilkins wrote: > On Sun, 27 Jun 1999 14:06:16 -0000, "J Cameron" <> > wrote : > > >Before I purchased a Saab 9000, I've never had a turbo engine. I really > >enjoy it but am looking for some tips to extend its life. > > > >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!) > > > >Anyway, If anyone has anymore tips on care to extend the life of these > >deliciously expensive turbos, feed 'em out. > > > 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 still reckon it's not a bad idea though, if you have just climbed the > Matterhorn or something similar on full throttle. > > -- > Regards, > Peter Wilkins ( Thanks, -- E.R. Sterbenz

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