Re: Cooling sysytem pressure test - Saab 9-3SS Bulletin Board - Saabnet.com
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Re: Cooling sysytem pressure test
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Posted by Justin VanAbrahams [Email] (#32) [Profile/Gallery] (more from Justin VanAbrahams) on Tue, 16 Jan 2018 09:42:54 Share Post by Email
In Reply to: Re: Cooling sysytem pressure test, SWEDECAR [Profile/Gallery] , Tue, 16 Jan 2018 09:03:29
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There are three O-rings over there by the right side motor mount - on the "heater core

https://www.amazon.com/gp/product/B0016HT9VM/ref=as_li_tf_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B0016HT9VM&linkCode=as2&tag=thesaabnetwork
https://www.amazon.com/gp/product/B007Q13DJ6/ref=as_li_tf_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B007Q13DJ6&linkCode=as2&tag=thesaabnetwork
https://www.amazon.com/gp/product/B00AWI2KA8/ref=as_li_tf_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B00AWI2KA8&linkCode=as2&tag=thesaabnetwork

(Amazon is mind-blowingly cheaper on that #12566429 part vs Saab)

Two of them go from the reservoir to the block, and the third from the reservoir to the hose. On mine, the two inner ones were leaking.

FWIW, you *might* consider just doing the water pump at the same time. It's barely any more work. Sure wish I had... after I replaced the O-rings the leak moved to the pump. Womp womp. The pump is very easy to replace - loosen the belt, remove the motor mount, remove the reservoir, remove the pump. Whole job is like an hour. Be SURE you have WIS available, as the water pump bolts seem impossibly loose - something like 12 lb ft or something. I suspect the average mechanic would dramatically overtighten those bolts. And, you need to hold the motor still as once you remove the mount it can move forwards and backwards quite a distance... you want it to go back where it came from! I didn't want to bust out the support beam so I scribed the mount so I could put it back.

The O-rings Anders is referring to are inside the push to connect fittings for the heater hoses, so there are O-rings at each end of those hoses. After I replaced my reservoir O-rings, then replaced the water pump, the leak moved to the engine side of one of the heater core hoses. New hoses are expensive! I didn't try to source just the O-rings, I replaced both hoses. With the exception of the thermostat, I think I've replaced everything that is likely to leak. 1.5 months, no loss so far. :)

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