Welcome to the North American Subaru Impreza Owners Club Monday September 1, 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 > Normally Aspirated Powertrain

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 03-18-2003, 02:32 AM   #1
demonic rabbit
Scooby Newbie
 
Member#: 32715
Join Date: Feb 2003
Location: Boston MA
Angry Overheating problem... can't figure it out!

I've encountered an overheating problem with my newly purchased 98 Impreza 2.2. I investigated previous threads (searched) and have come to the conclusion that my head gasket may be blown. However, I am not quite ready to settle on this attribution, and I am seeking some wisdom.

I understand that a blown head gasket typically involves white exhaust smoke, and likewise mixed oil/coolant. On long driving endeavors, overheating may be common especially when approaching lower speeds or stops. Is this fairly correct information?

My problem began when I was making a 180 mile highway trip. The car began overheating and I would stop to cool and fill the radiator roughly every 30-40 minutes with water. Overheating began at 90 miles, and resumed every 30 miles following the formality described previously. Each "fill," (3) total, utilized roughly 3/4 of a gallon.

Today I set out to test the car by topping off the radiator and letting the car run for about 3 minutes with the cap off to eliminate air as best as possible. I then let the car run about 15 minutes before stopping, waiting to cool, and adding more water. Next, I topped off the overflow tank with antifreeze. At this point, I allowed the car to idle for about 30 minutes, periodically checking for dripping and leaks. I couldn't find any such evidence, and the radiator level was only slightly depressed. Both hoses seemed in order, and I could not see any fluid leaking from the bottom of the radiator.

I then "road tested" the car to see if the problem was somehow solved. After 10 minutes, I noticed some smoke exiting the overflow tank (especially when stopped), while the temperature was at 40%/normal of max. After 15 minutes, the heat (which was on full blast) went cold. Almost concurrently, there was also small interval when smoking ceased. At around 20 minutes, the smoking increased, both while stopped and running (especially during acceleration bursts), and the temperature increased to 60 %. Between 20-25 minutes, the smoking increased further, and the temperature finally reached max at the end of the interval.

Also, I have not witnessed white smoke in the exhaust, but the oil does seem a bit wierd. It smells off and looks a bit dark, but one of my friends told me that this was probably because of the overheating and not necessarily because of antifreeze/water mix.

Tomorrow, I am probably going to have a shop do a pressure test, and possibly check the ECU for any codes. I would greatly appreciate any insight, suggestions, or what not. Thanks!
* Registered users of the site do not see these ads.
demonic rabbit is offline   Reply With Quote
Old 03-18-2003, 03:05 PM   #2
rhdude
Scooby Guru
 
Member#: 6637
Join Date: May 2001
Chapter/Region: MAIC
Location: Manassas
Vehicle:
2009 Acura MDX Sport

Default

yup, sounds like headgaksets...

FYI, I never had mixed oil/coolant or smoke when I blew my headgasket...
rhdude is offline   Reply With Quote
Old 03-19-2003, 12:36 AM   #3
thavy
Scooby Newbie
 
Member#: 2505
Join Date: Sep 2000
Location: Fairfax, VA
Vehicle:
95 Impreza L

Default

I'm thinking either you have a bad leak or you have a bad thermostat. Most people who have had a bad headgasket has their overflow tank full and i noticed that you had to fill yours up. I would seriously do the pressure test and buy a new oem thermostat. I had a thermostat from Advanced Auto one time and my car still kept on overheating. After replacing that with an OEM one i have yet to see any problems.

Thavy
thavy is offline   Reply With Quote
Old 03-19-2003, 06:37 PM   #4
KCramer
Scooby Newbie
 
Member#: 3624
Join Date: Jan 2001
Location: West V.
Vehicle:
'02 Monster Bugeye
WRB

Default

my problem was similar, and i refused to believe that the head gaskets were blown after only 75,000miles. but, it was in deed the head gaskets. no smoke, no water in oil just overheating and coolant pouring out of the over flow. sorry but it is your head gaskets. parts and labor for me came to roughly 1200 bucks. that was new water pump, t-belt, cam seals, crank seal, clutch, head gaskets, o-rings for the studs, thermostat and gasket. i think that was all. it sucks but hey...it happens.
KCramer is offline   Reply With Quote
Old 03-20-2003, 02:26 AM   #5
demonic rabbit
Scooby Newbie
 
Member#: 32715
Join Date: Feb 2003
Location: Boston MA
Default

Thanks a lot for the help, it sounds like I have a problem on my hands. I just wanted to get a few extra opinions. Well, we all know what I'll be spending my next two weekends working on! I consider myself very lucky to have a student auto garage where I can fix it, although it may take me some time.
demonic rabbit is offline   Reply With Quote
Old 03-20-2003, 09:15 AM   #6
cavymeister
Scooby Specialist
 
Member#: 24463
Join Date: Sep 2002
Location: Leesburg, VA
Vehicle:
2003 Chevy S10
91 Hunduh Civic BASE

Default

When you get out to fill it up, does it smell like a/f?? Pull a pulg. if it's glossy, or sticky, you've got a head gasket, or head problem. If it's not and it smells like antifreeze when you get out, change the radaitor cap, and tighten up all of the hoses. Sounds like you've got a pressure related leak. It may be blowing antifreeze from a weak hose, poorly tightened hose, or a weak spring on the radiator cap. Be sure to check for a split, or softness, or even a hardeness in your hoses.

Good Luck!
cavymeister is offline   Reply With Quote
Old 03-20-2003, 09:17 AM   #7
cavymeister
Scooby Specialist
 
Member#: 24463
Join Date: Sep 2002
Location: Leesburg, VA
Vehicle:
2003 Chevy S10
91 Hunduh Civic BASE

Default

I just re-read your post. If there was "smoke" (possibly steam???) above your overflow tank, then you need to replace the rad. cap. It's about $4-$6. That should fix the problem!
cavymeister is offline   Reply With Quote
Old 03-20-2003, 05:47 PM   #8
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

just take it in and have a hydracarbon test done...

i've got $$ to lay that you've got much more serious issues than a hose leak or blocked thermostat

56k miles.. cyl #4 went bye bye on my DOHC...

same symptoms as you're describing here...
denial is fine.. but sooner or later you're gonna have to face the music

Jamie www.subiegalracing.com
Subie Gal 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
overheating problem, cant figure it out shemp321 Service & Maintenance 7 02-27-2009 05:29 PM
Grinding noise... I can't figure it out WillDenham Service & Maintenance 9 10-23-2006 10:06 AM
weird sounds...can't figure it out anthonyrb98 Transmission (AT/MT) & Driveline 0 06-06-2006 06:27 PM
stupid question (but I can't figure it out!!) Z06-KILLR General Community 1 03-16-2004 07:51 AM
What color? I can't figure it out! ImprezedRS Interior & Exterior Modification 16 07-16-2003 10:12 PM


All times are GMT -4. The time now is 11:12 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.