Welcome to the North American Subaru Impreza Owners Club Thursday March 28, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Factory 2.5L Turbo Powertrain (EJ Series Factory 2.5L Turbo)

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 11-18-2022, 11:45 PM   #1
cole_naymash
Scooby Newbie
 
Member#: 269617
Join Date: Jan 2011
Chapter/Region: RMIC
Location: Englewood, CO
Vehicle:
2007 WRX
Silver

Default Good ol Over Heating - 2007 2.5 WRX 122k

Hey Everyone, I have a 2007 wrx with 122k on a totally stock motor. I bought it from a dealer that does salvage to rebuild sales. It was in a front end accident and rebuilt. I've had it for a week and drove it 20 miles from where I bought it without any issues, drove it to get the emissions done, to work, lunch and back, no issues. BUT I was stuck in a winter storm with stop and go traffic out here in CO and it started over heating.

The car has a koyo radiator but it looks like possibly after market fans (not sure how to tell). The koyo radiator may have been the one that was in the crash as it has two really good dents in it (unknown).

I had it towed to my house because I didn't know what was going on but here's what I've found out today -

What I do and don't know (the facts):
1. It has green 50/50 coolant in it, probably from AutoZone.
2. The upper rad hose def has a tear or hole in it and needs to be replaced. I could feel fresh coolant every time I ran my gloves around it and it was making a hissing noise.
3. The coolant was still clear after the over heat (not milky).
4. I don't have history on the water pump/timing belt so that's getting replaced (ordered a Gates kit that will be here this week).
5. As stated earlier, I don't know about the fans.
6. The radiator may have core damage from the dents, it isn't physically leaking.
7. I just retested in my garage and the fans came on for the first time while idling at 204F, stayed on until the car started over heating at 219F (repeated highway failure).
8. The heater works great in the car so I'm guessing the heater core is NOT plugged.

Steps in the incoming week(s)
1. Going to replace both upper and lower rad hoses and bleed air from system.
2. Going to get OEM fans
3. Going to test for hydrocarbon/combustion gas from the radiator/coolant.
3. I've heard the blue coolant long term is the way to go for corrosion protection, when I replace the water pump and timing belt, I'll use the genuine coolant after a flush.
4. I may also test compression but that might not tell the whole story.

I'm creating this post to be thorough, create a good historical walk through when I do solve the problem, and to crowdsource some feedback/opinions.

Thanks everyone!
Cole
* Registered users of the site do not see these ads.
cole_naymash is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 11-23-2022, 09:22 PM   #2
Snowcat021
Scooby Newbie
 
Member#: 532253
Join Date: Nov 2022
Default

I have a 2005, and I had to replace the fans a couple years ago due to a bad fan motor. It's tricky troubleshooting those because they come on at different speeds (mph), a/c on or off, and Temps. Green antifreeze is okay if it had the subaru additive in it...hard to know. I think otherwise it's bad for the aluminum waterpump. If fluid is low, it may be a small rubber line somewhere that is hard to see.
Snowcat021 is offline   Reply With Quote
Old 11-28-2022, 02:56 AM   #3
NickVu
Scooby Newbie
 
Member#: 27525
Join Date: Oct 2002
Chapter/Region: SCIC
Location: Orange County
Vehicle:
03 wrx wagon
yellow

Default

If it had a koyo radiator chances are it's thicker than stock, that's probably why the fan was replaced with thinner fans. The stock fans barely clear the hose with a thicker radiator. Over time as the hose weakens it'll bulge and lightly touch the fan. The hose shrinks when things cool down. Check closely for wear marks.
NickVu is offline   Reply With Quote
Old 11-28-2022, 04:34 PM   #4
AliBenn
Scooby Guru
 
Member#: 487
Join Date: Nov 1999
Chapter/Region: TXIC
Location: Houston TX
Vehicle:
1998 /2005 STunIcorn
Acadia Green USDM 22b

Default

are u having to re-fill coolant to proper level a few times?
AliBenn is offline   Reply With Quote
Old 12-08-2022, 03:56 PM   #5
umscooby
Scooby Specialist
 
Member#: 50902
Join Date: Dec 2003
Chapter/Region: RMIC
Location: backroads
Vehicle:
98
$$$ Green

Default

Should definetely change out the T-stat while you're in there, just mentioned becuase I dont see it on your list. It's possible that with the hole in your rad hose you might have just trapped some air in there. Also, I'll be in Englewood to check progress on my build at HTC this coming Saturday, if you're interested in getting another set of eyes on it shoot me a pm.
umscooby is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -4. The time now is 06:40 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.