Welcome to the North American Subaru Impreza Owners Club Saturday December 20, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Service & Maintenance

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.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 03-15-2008, 11:19 PM   #1
gsxbusar1300
Scooby Newbie
 
Member#: 161982
Join Date: Oct 2007
Chapter/Region: SCIC
Location: Bay Area, Ca & San Diego, Ca
Vehicle:
04 WRX
Silver

Default 1998 2.5RS Overheating Question

Hey Guys,

Car info:
I'm having overheating problems with my car. It's got about 113,xxx miles on it and it had the timing belt and water pump changed at about 105,xxx miles. I just recently bought a new radiator for the car and is on it as well. We made sure that the radiator, fans and water pump were working, and they are.

"Diagnosis":
My car was taken into a radiator shop and the mechanic there thinks that I have a blown head gasket. ALL of my fluids were changed by my friend and he said that the oil and fluids were not contaminated with water so he doesn't think that it is a blown head gasket.

Problem:
The car seems to be fine when it is in motion, however, if the car idles (i.e. at a stop light/traffic jam) it begins to heat up. The car is running with no thermostat right now because when we put a new one in, the temp gauges on my dash indicates that it is overheating even when the car has just been running for only 3 mins.

If you guys could help me with any suggestions or possibly identify/solve the problem, I would greatly appreciate it. Thanks for the help, and have a good one!
* Registered users of the site do not see these ads.
gsxbusar1300 is offline   Reply With Quote
Old 03-15-2008, 11:45 PM   #2
munkis
Scooby Guru
 
Member#: 1847
Join Date: Jul 2000
Chapter/Region: Tri-State
Location: brokenmotorsports.com
Vehicle:
Team Broken: V6 GF
rallyarmor.com

Default

if you are overheating with no thermostat thats a pretty good sign of a leaking headgasket.

98's are a pain to bleed the air out of though, you should follow the instructions in the owners manual.
munkis is offline   Reply With Quote
Old 03-15-2008, 11:57 PM   #3
Subaruski
Scooby Specialist
 
Member#: 39905
Join Date: Jul 2003
Chapter/Region: NWIC
Location: Portlandia
Default

had to do the headgaskets around the same mileage on my 98rs. Its something that has to be taken care of on the dohc motor at that high of mileage. I replaced the water pump, thermostat, and timing belt when i did mine but it sounds like you just recently took care of that. When you change the gaskets check the heads and see if they are warped. Machine them down if they have any warping what so ever.
Subaruski is offline   Reply With Quote
Old 03-16-2008, 05:02 AM   #4
gsxbusar1300
Scooby Newbie
 
Member#: 161982
Join Date: Oct 2007
Chapter/Region: SCIC
Location: Bay Area, Ca & San Diego, Ca
Vehicle:
04 WRX
Silver

Default

Okay I'll try and check on that next week when I have time. Thank you guys very much for your help =D
gsxbusar1300 is offline   Reply With Quote
Old 03-16-2008, 04:48 PM   #5
gsxbusar1300
Scooby Newbie
 
Member#: 161982
Join Date: Oct 2007
Chapter/Region: SCIC
Location: Bay Area, Ca & San Diego, Ca
Vehicle:
04 WRX
Silver

Default

I have a friend who can swap a brand new '06 2.5i into my RS so hopefully that'll just solve everything. The only problem that I might run into is passing visual smog test because of the EGR valve will be in a different location....I hate CA emission regulations T_T lol
gsxbusar1300 is offline   Reply With Quote
Old 03-17-2008, 12:27 AM   #6
Illsti
Scooby Specialist
 
Member#: 131183
Join Date: Nov 2006
Chapter/Region: Tri-State
Location: Turbo's R' Us
Vehicle:
05 STI
CGM 402whp386wtq

Default

pressure check the coolant system....
Illsti is offline   Reply With Quote
Old 03-17-2008, 01:10 AM   #7
Subie Gal
GC84Ever
Super Moderator
 
Member#: 301
Join Date: Sep 1999
Chapter/Region: NWIC
Location: WA
Vehicle:
1970 FF-1 & '70 Van
02 WRX/01 RS

Default

sure sounds like HG failure to me as you are describing it
exact same symptoms I had in my 99 Legacy which suffered HG failure.


IMHO, the thing to do is go and have a hydra-carbon sniffer test done
rather than guessing, at get the proper diagnosis so you will know for sure.
Subie Gal is offline   Reply With Quote
Old 03-17-2008, 01:11 AM   #8
gsxbusar1300
Scooby Newbie
 
Member#: 161982
Join Date: Oct 2007
Chapter/Region: SCIC
Location: Bay Area, Ca & San Diego, Ca
Vehicle:
04 WRX
Silver

Default

Quote:
Originally Posted by Illsti View Post
pressure check the coolant system....
we have verified that the system does have pressure...we checked the components of the system and they are working properly. as of this point, i'm convinced that the problem is internal and is cheaper for me to swap the motor since my friend can do it, rather than to R&R my existing head/motor.
gsxbusar1300 is offline   Reply With Quote
Old 03-17-2008, 01:30 AM   #9
gsxbusar1300
Scooby Newbie
 
Member#: 161982
Join Date: Oct 2007
Chapter/Region: SCIC
Location: Bay Area, Ca & San Diego, Ca
Vehicle:
04 WRX
Silver

Default

Quote:
Originally Posted by Subie Gal View Post
sure sounds like HG failure to me as you are describing it
exact same symptoms I had in my 99 Legacy which suffered HG failure.


IMHO, the thing to do is go and have a hydra-carbon sniffer test done
rather than guessing, at get the proper diagnosis so you will know for sure.

thanks Subie Gal! i checked out some other forum sites and other helpful sites on hydrocarbon sniffer tests and the symptoms they listed there are exactly identical to the problems that i am experiencing. the procedures and self tests that they listed were the exact checks my friend and i did and the results were similar.

also, when the mechanic at the radiator shop took a look at it, he had me take off the radiator cap (after the car had cooled for a bit) and had me start the car up and immediately, exhaust smoke came from the radiator...so i guess i should make sure to see whether or not my heads are still fine so i can just replace the gaskets.
gsxbusar1300 is offline   Reply With Quote
Old 03-17-2008, 01:34 AM   #10
gsxbusar1300
Scooby Newbie
 
Member#: 161982
Join Date: Oct 2007
Chapter/Region: SCIC
Location: Bay Area, Ca & San Diego, Ca
Vehicle:
04 WRX
Silver

Default

^^ although, i think the previous owners had been running the car for a while with the HGs blown (and didnt bother telling me) so i believe that it is too optimistic to think that my heads are still fine
gsxbusar1300 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
1998 2.5rs To 1999 2.5rs gc8v6 Subaru Conversions 2 11-02-2009 01:59 PM
Wiring question. 1998 2.5RS turboed22 Normally Aspirated with bolt-on Forced Induction Powertrain 3 05-24-2009 04:29 AM
gauging interest: 1998 2.5RS-t with Axis stage 2 motor (new)... Keith Private Vehicle 'For Sale' Classifieds 28 02-18-2009 03:40 PM
FT: 1998 2.5rs Black 2 door GOLDIES! loudbay Private Vehicle 'For Sale' Classifieds 2 03-03-2005 07:49 PM
2000 2.5RS' limited slip diff -> 1998 2.5RS ? grue Transmission (AT/MT) & Driveline 3 04-13-2004 03:59 PM


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


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.