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Date: Fri, 17 Jun 2005 14:29:25 -0400
From: "Valjean" <jvaljeannospamamcharter.net>
Subject: Re: Overheating=(


"Back flush and refill" -- ugh; how is that done on the 1994 9000 CS turbo, pray tell... Some general cleaning instructions I have read say you need to remove the thermostat for it. "Malt_Hound" <Malt_Houndnospamm*yahoo.com> wrote in message news:gfWdnccrRsZH_zLfRVn-tAnospamphia.com... > Valjean wrote: >> I'm familiar with the scene he's described; mine, though, runs hot(ter) >> now at high speed. It's still at around 3/4s on the gauge, however. How's >> that? Now when it's cool outside, it has run at around 1/4. I do have the >> fan switch and thermostat you alluded to installed, too! (and not the >> blue coolant, since I intend to replace two heater hoses first...).. >> >> > > Aha! But this is a totally different scenario. Come, Watson, come. The > game is afoot! > > Firstly, let me say that I think the temperature (assuming a good gauge > reading which means a good temperature sending unit) should *always* be at > half staff, never higher, once reaching operating temperature. > > So, with your symptom of higher temperature under higher heat load (higher > engine *and* chassis speeds) I would suspect either a restricted cooling > system due to past corrosion blockage or a substandard water-pump (why > *do* they insist on calling it a water pump?). > > My course of action, based on Yankee frugality, would first off be to do > an aggressive cooling system back flush and refill with *good* *quality* > *coolant*. While you are at it - throw a thermostat in. They're cheap > enough... > > If that don't fix her, drain the coolant and retain it for reuse. Next > step is to go for the water pump. While it is off, get a gander at the > state of the things inside the block. This will require an inspection > mirror and good flashlight to even see a thing up there, but what we are > looking for is excessive deposits inside the water jacket that might > indicate there are other restrictions in the smaller passages. This would > be far more likely for you cheapskates out there using the Pres tone brand > coolant in your SAABs... > > -Fred W > > > > >

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