Welcome to the North American Subaru Impreza Owners Club Sunday October 22, 2017
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
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. 
Thread Tools Display Modes
Old 09-07-2012, 11:13 AM   #1
Scooby Newbie
Member#: 290509
Join Date: Aug 2011
Location: Troy Oh
2000 Impreza

Default Overheating <3k rpm Normal <4k rpm?????

dont know how to edit title.... overheats below 3k and is fine above.
My car is currently overheating under 3k rpm. anything above that it is fine. What could be the issue? It will do this at the same speed 70ish mph, in 6th gear 2800rpm it over heats, 5th 3500 is fine. Now for what I have. It is a sleeved and o-ringed sti 2.5 liter with oem head gaskets 5k miles old, all were copper coated before assembly. The car is pushing 27 psi with a gt35, arp head studs, oem water pump and thermostat. It does not seem to be pushing coolant, if it is it is only slightly because i cant notice. Upon this problem i let the car sit over night and noticed my coolant to be a water bottle or so low. I dont know how that could happen I dont see coolant getting burned or anything. Anyway let me knnow what it could be before I tear it apart and do the head gaskets.
* Registered users of the site do not see these ads.

Last edited by guitarsurgeon; 09-07-2012 at 12:25 PM.
guitarsurgeon is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 09-07-2012, 11:56 AM   #2
Scooby Specialist
Member#: 290592
Join Date: Aug 2011
Chapter/Region: South East
Location: Charlotte, NC
15 Outback,


I just read another thread somewhere here from someone with a built motor, also overheating and eating coolant. might get better input from the built motor forum, but it sounds like the thermostat could be acting up
mechatricity is offline   Reply With Quote
Old 10-03-2012, 07:51 PM   #3
Scooby Newbie
Member#: 334087
Join Date: Oct 2012

I would also guess the thermostat. It's probably some kind of warmup thing that kicks off over 4k.
suppersppy is offline   Reply With Quote

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 04:27 PM.

Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2017 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.