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Old 11-05-2001, 01:22 PM   #1
rjones
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Join Date: May 2000
Location: Cambridge, MA
Vehicle:
2003 wrx wagon
silver

Default Thermostat Removal / Replacement-- Messy?

I've been having overheating problems in my '99 RS. After some investigation, I think its just a bad thermostat. I'd get it fixed under warrenty, but the closes dealer is about a twenty minute drive and I don't want to pay for a tow/ risk damage driving when I could replace a $15 part.

Anywhoo, when you take out or access the thermostat, does all the coolant come out with it? I know ours is located at the bottom of the engine block. I'm trying to determine if I can do this in my driveway.....any tips on how to?

Thanks
rj
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Old 11-05-2001, 01:33 PM   #2
HndaTch627
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you might be better off letting the dealer reapir this in the event that there has been further damage done already, then they CAN NOT blame you for it.

Jeremy
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Old 11-05-2001, 02:12 PM   #3
Julian
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If you do it yourself, you will have to drain the coolant. And you'll probably still find some in the system when you remove the thermostat. I'd recommend a factory thermostat, but if you get something like the Stant, make sure you get the Stant Gold. On another car I had 3 regular Stants go out on me (bought one, bought a Carquest one (made my Stant), tried another one).
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Old 11-05-2001, 02:18 PM   #4
Peaty
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It's not hard but you will have to let most all the coolant out of the system. The biggest risk is getting air stuck in the system. That's minimized though if you don't have to remove the coolant plugs in the block which you don't.

Instructions here will help:

http://www.scoobymods.com/mods/impreza/oilcooler.php

Here is a pic of the housing, this one is for a motor with an OEM oil cooler but it's basically the same. The housing has an O-Ring gasket not a fiber one so you will be able to reuse it no problem. Make sure you take notice of which way the thermostat is facing. Be prepared for another flood of coolant when it comes out too.

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Old 11-05-2001, 02:25 PM   #5
rjones
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Default CHanks

Thanks for the input, all.
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Old 11-05-2001, 10:35 PM   #6
donut
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hey dude
i was having an over heating problem on my 98 rs. i know the engines are different but they have alot in common. after a few thermastats i took it to a shop. a lot of people at this site gave me a ton of advice and they were right unforturately for me. i had blow a head gasket. 1600 bucks later my rs is back from the dead. i hope you have better luck than me

good luck
matt
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