Welcome to the North American Subaru Impreza Owners Club Tuesday March 19, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
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.







* 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 02-06-2006, 03:27 PM   #1
fourbyman
Scooby Newbie
 
Member#: 100444
Join Date: Nov 2005
Default head gaskets?

I was just checking if anyone else agrees with my prediction. I have a 98 rs and sometimes when driving my duct temp drops to outside temp and my engine temp jumps close to the hot level. Then very breifly it goes back to normal and the duct temp returns to where it was. I'm thinkin that the head gaskets are starting to go what do you think???

If I do need to replace the headgaskets the suby dealer said that they do not replace the head bolts. In my shop we always replace the headbolts on cars. I was wondering what everyone else has done. The local machine shop said they would port and polish the heads for $350. Has anyone else done this and if so how much for gains have you received? Thanks for your help!!
* Registered users of the site do not see these ads.
fourbyman is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 02-06-2006, 03:39 PM   #2
MY99 2.5GT
Scooby Specialist
 
Member#: 5030
Join Date: Mar 2001
Chapter/Region: MAIC
Location: Martinsburg, WV, USA
Vehicle:
1999 Legacy 2.5GT
19 Audi RS3, 13 Armada

Default

What do you mean by duct temp?

If the coolent temp goes up then comes back down it sounds like the thermostat has gone bad or you have a clog in the cooling stream. Replace the thermostat with one from the subi dealer and see if you still have trouble. Make sure to replace it with one from the dealer. The cheaper auto parts store models often don't have the check ball that allows air bubbles to burp out of the cooling system. This will cause endless overheats and eventually warp the deck or blow the motor.

As well replace the radiator cap ($8) for 13# at Advance Auto. If this gets clogged or malfunctions it could trap the coolent in the overflow reserviour not letting it back into the motor. A good sign that this is the culprit is if you run the car until warm, shut it off and let it cool. If you see the upper radiator hose collapse pop the radiator cap off and watch it re-inflate. Replace the cap immediately.

Let us know how it turns out.

Brad
MY99 2.5GT is offline   Reply With Quote
Old 02-06-2006, 04:03 PM   #3
Kawikid20o2
Scooby Specialist
 
Member#: 86291
Join Date: May 2005
Chapter/Region: NESIC
Location: New Fairfield, CT
Vehicle:
'97 LegaSTi-2.5XTR
'96 BrightonCoupeWRX-SR30

Default

pretty sure he means the heat inside the car when he says duct temp. Sounds like air bubbles or too little coolant, are you lossing any? boiling in the resevoir?
Kawikid20o2 is offline   Reply With Quote
Old 02-06-2006, 04:25 PM   #4
fourbyman
Scooby Newbie
 
Member#: 100444
Join Date: Nov 2005
Default

i'm a mechanic and i dont beleive that the thermostat is the culprit. Inside the overflow it seams that there is an oily residue in the tank oh crap
fourbyman is offline   Reply With Quote
Old 02-06-2006, 04:27 PM   #5
linsavy
Scooby Specialist
 
Member#: 11620
Join Date: Oct 2001
Location: Ontario
Vehicle:
1997 GF4-STiV3 clone

Default

most people reuse the head bolts, but the shop manual suggests new ones.
Not sure the p&p is worth it by itself, but if you plan to do the whole build up of cams etc. then go for it.
Check for goopy stuff in the bottom of radiator overflow tank. Check for signs of barfed up coolent around said tank.

Try not to use the dealer as they charge too much for the HG job. An indy shop is usually significantly less $$.
linsavy is offline   Reply With Quote
Old 02-06-2006, 10:02 PM   #6
SCOOBY2.5RS
Scooby Specialist
 
Member#: 66234
Join Date: Jul 2004
Chapter/Region: MWSOC
Vehicle:
3G WRX-WRB
Scooby-X Monster

Subaru Stars

What year is it, most 98 through 99's rs have headgasket problems! there known for that. I had the same problem, overheated the engine, broke the gasket, and broke the piston rings. I was sucking through gallons of oil a week.

Keep an eye out for your antifreeze for your engine. If it starts getting air in the system you might have a headgasket problem. The compression from the piston drives air through the broken gasket and into small holes around the engine head. These holes let antifreeze through out the engine and keep it cool. if air gets in, the antifreeze and cooling system can't do its job and the engine overheats. Causing major problems!!!!!!!!

Keep an eye out for you oil level too. If that starts to go you might have piston ring problems too!

Subaru now replaces the gaskets with a new materal that will not cause anymore failures.

Scooby2.5RS
SCOOBY2.5RS is offline   Reply With Quote
Old 02-06-2006, 10:31 PM   #7
wagonman
Scooby Specialist
 
Member#: 971
Join Date: Feb 2000
Chapter/Region: South East
Location: Simpsonville, SC
Default

Mine did this and it was the radiator cap. Any dealership should be able to test it and tell you if its bad or not.
wagonman 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
Blown head gaskets, warped heads and a piston melted to the cylinder wall Borjaq Warranty Issues & SOA Problems 13 05-22-2010 10:16 PM
Help! FAST! Do I need to use gasket sealer, when replaceing my head gaskets?! wighti Tri-State Area Forum 5 10-05-2003 10:19 PM
Which head gaskets on EJ22T with EJ25 SOHC heads? Eric SS Normally Aspirated with bolt-on Forced Induction Powertrain 22 05-11-2002 11:08 AM
Leaky Head Gasket & Water Pump Gasket - MY00 Forester lark6 Normally Aspirated Powertrain 20 11-10-2001 10:22 PM
EJ22T with 2.5 SOHc heads. which head gasket? Eric SS Normally Aspirated with bolt-on Forced Induction Powertrain 10 10-03-2001 11:40 AM

All times are GMT -4. The time now is 07:08 AM.


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.