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Old 07-14-2014, 11:26 PM   #1
Soxfan14sk8
Scooby Newbie
 
Member#: 376734
Join Date: Dec 2013
Chapter/Region: NESIC
Location: Vermont
Vehicle:
2005 STi
WRB

Default Not starting after radiator install

My car encountered the common plastic end tank leak a week ago. I drove the car home and it the needle didn't get anywhere near the red on the gauge. Tonight I installed my koyorad aluminum racing radiator and changed my oil and changed my thermostat which broke on the ride home. Thermostat was replaced with oem. Anyway after the install and filling the tank and radiator, and filling the engine with oil, I started then car and let it idle a minute before I put a little more oil in. I put enough in to read between the holes on the stick and was getting ready to leave but the car wouldn't start. Turned over several times and nothing. After turning over the motor several times the entire coolant system became HIGHLY pressurized. Hoses solid as a rock and air coming out of the cap. Once you take the cap off air bubbles out. Thought maybe air was trapped in the block or something and it just needed to burp. Repeated the steps four times or so but the same thing just kept happening and it won't fire. Try to turn the car over with the radiator cap off and fluid just shoots out of it. Please tell my motor is gone! Thermostat problem??? 2005 Sti all stock 69,xxx miles
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Old 07-15-2014, 01:13 AM   #2
kevron
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Member#: 190617
Join Date: Oct 2008
Chapter/Region: MWSOC
Location: Elk Ridge, UT
Vehicle:
2002 WRX
Silver

Default

Your head gasket is toast...
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Old 07-15-2014, 01:15 AM   #3
kevron
Scooby Newbie
 
Member#: 190617
Join Date: Oct 2008
Chapter/Region: MWSOC
Location: Elk Ridge, UT
Vehicle:
2002 WRX
Silver

Default

Pull all the plugs and find the wet one. Pretty low mileage for a head gasket failure but it's not uncommon either. Let me know what you find...
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Old 07-15-2014, 01:31 AM   #4
Scoobiesdoobies
Scooby Specialist
 
Member#: 321546
Join Date: May 2012
Chapter/Region: BAIC
Location: Santa Cruz, Ca
Vehicle:
2006 Wrx Limited
OBP

Default

Did you install your tstat backwards?
If so it would not open at the rated water temp and over pressurize the system.

Either that or figure out why the radiator cracked in the first place.

Since it wont run....drain your coolant and take the lower hose off and see if the tstat is installed backwards.

When it over pressurizes is it coming out of the overflow at all?
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