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Re: Replacing Thermostat on 91 4cyl Posted by Ari [Email]  (#2847) [Profile/Gallery]
(more from Ari) on Fri, 23 Feb 2001 12:58:42
In Reply to: Replacing Thermostat on 91 4cyl, Joey, Thu, 22 Feb 2001 16:14:14 Members do not see ads below this line. - Help Keep This Site Online - Signup |
What Daren said is right on. Get the Saab thermostat, and get a 82C model if you can.
Depending on a few things, I usually budget about an hour to replace a 9000 thermostat. It looks tight, but you need a little patience. Here are some tricks-
I don't bother to drain the cooling system down too much, and I stay away from the (usually frozen) drain plugs. I went to the autoparts/discount store a few years back and bought a universal windshield washer replacement pump. I soldered two big clips onto the wires. I then thread a short hose from the input of the pump into the coolant reservoir, the output into a suitable container, and hook the leads to the battery. After I've pumped the coolant reseroir empty, I pull it off the hose, and run the line into the pump down the hose. Once the level is about 5-6 inches below the top of the hose, I'm done.
The thermostat is a little buried, but do yourself a favor, and pull off the big hose into the intake manifold. It'll give you a LOT more room. I also get some string and tie back hoses and wires. The time spepnd 'clearing the area' of hoses and such will pay dividends when you go to unbolt the housing.
Depending on the year, there is a fuel pressure regulator bracket on top of the thermostat housing. Pull it off, then you can access the two bolts holding the housing on. Remove the housing, pop out the old thermostat, pop in the new one (make sure the gasket is in place, and the HOLE in the thermostat is UP), and bolt everything back together. There is no need to bleed a 9000 cooling system - it's self bleeding IF you put the thermostat in with the hole UP.
Getting to the bolts holding the thermostat housing on is a little tricky, but rummage through your toolbox for sockets and extensions. Yes, you may not have a straight shot at a bolt head, but take your time - you're not getting paid for this, so what's the rush?
As I said, I figure about an hour - that includes draining and filling the system (with the pump trick), finding my tools, finding the tool that rolled under the car, you know, the usual.
, Fri, 23 Feb 2001 12:58:42 <-- Viewing This Message
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