Welcome to the North American Subaru Impreza Owners Club Sunday April 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 > Built Motor Discussion

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 07-01-2008, 06:23 PM   #1
avi1777
Scooby Newbie
 
Member#: 147652
Join Date: Apr 2007
Vehicle:
02 sti
white

Default major problem

hi guys
i have a build 2.5 sti with gt35r
i installed a fluidyne radiator and 72 deg thermostat
the problem is the car is loosing way to much water and there is no leak what so ever
for example-yesterdy during one and a half ours of tuning i lost 3 liters!!!
the water temp was alomost 120deg so i tought its a bad thermostat and in the morning i saw its fine but there was 3 liter of water less then full
no water in the oil and the fans work fine.
what can it be???
* Registered users of the site do not see these ads.
avi1777 is offline   Reply With Quote
Old 07-02-2008, 12:33 AM   #2
railguy
Scooby Specialist
 
Member#: 53756
Join Date: Jan 2004
Chapter/Region: MAIC
Location: MAIC
Vehicle:
2002 WRX
WRB

Default

Could be 3 things, 1) you have a headgasket blown and your burning doenst seem like the case but possible. 2) you have a leak somewhere and you just dont know it. 3) when you installed the radiator and t-stat you did not properly bleed it and the coolant system worked out all the air pockets. Good thing about fluids is that they are real objects, they dont just dissappear.
railguy is offline   Reply With Quote
Old 07-02-2008, 07:46 AM   #3
avi1777
Scooby Newbie
 
Member#: 147652
Join Date: Apr 2007
Vehicle:
02 sti
white

Default

thanks
avi1777 is offline   Reply With Quote
Old 07-03-2008, 05:42 PM   #4
avi1777
Scooby Newbie
 
Member#: 147652
Join Date: Apr 2007
Vehicle:
02 sti
white

Default

it was a bad head gasket
and the engine did only2000 miles on0.7 bar of boost
probably bad Assembly off the engine?
what do you think?they say the gasket got ****ed beacuse the car got hot but it was loosing water way beafore and i fill it up half a liter each time i saw water missing
i had a wrx once and it got hot for much longer than this sti and the head gasket was fine.
avi1777 is offline   Reply With Quote
Old 07-03-2008, 07:15 PM   #5
charliew
Scooby Specialist
 
Member#: 125304
Join Date: Sep 2006
Location: Crawford, TX.
Default

Crappy head installation probably but also maybe not filled with coolant properly at begining.
charliew is offline   Reply With Quote
Old 07-03-2008, 07:36 PM   #6
tekfoc
Scooby Specialist
 
Member#: 21392
Join Date: Jul 2002
Chapter/Region: Tri-State
Location: NEW YORK CITY
Vehicle:
2014 CLA 45 AMG MB
WHITE /07 STI IS SOLD

Default

when you pull off heads you need to send them to a machine shop that is very experience with subaru's to have them cleaned and check for straightness and lightly resurface the heads otherwise your almost always going to have headgasket problems.
if your using stock head bolts you need to replace them with new head bolts.
are engines use torq to yield bolts, that means these bolts stretch when used for the first time and should not be reused .
tekfoc is offline   Reply With Quote
Old 07-03-2008, 07:39 PM   #7
LiquidForce
Scooby Specialist
 
Member#: 12811
Join Date: Nov 2001
Chapter/Region: South East
Location: Roswell Ga
Vehicle:
2002 2.5l Wrx
517whp/516wtq (Stage pi)

Default

Out of curiosity, what gaskets and head bolts/studs were used?
LiquidForce is offline   Reply With Quote
Old 07-04-2008, 07:29 AM   #8
avi1777
Scooby Newbie
 
Member#: 147652
Join Date: Apr 2007
Vehicle:
02 sti
white

Default

I'm not sure about the gaskets but the bolts are ARP
the engine is made from cp,pauter and darton sleeves
i bought the good stuff but i think now it was bad Assembly
avi1777 is offline   Reply With Quote
Old 07-04-2008, 11:01 AM   #9
tekfoc
Scooby Specialist
 
Member#: 21392
Join Date: Jul 2002
Chapter/Region: Tri-State
Location: NEW YORK CITY
Vehicle:
2014 CLA 45 AMG MB
WHITE /07 STI IS SOLD

Default

ARP head bolts need to be retorqed after some miles of use.
but alot of engine builders just torq the heads to a much higher speck instead of having the owner come back for a retorq of heads why! cost of labor for retorq most people are not going to go for that additional cost.
ARP wants you to retorq the heads .
tekfoc is offline   Reply With Quote
Old 07-04-2008, 01:28 PM   #10
avi1777
Scooby Newbie
 
Member#: 147652
Join Date: Apr 2007
Vehicle:
02 sti
white

Default

retorq means to tighten the bolts after some time/miles
avi1777 is offline   Reply With Quote
Old 07-04-2008, 04:36 PM   #11
tekfoc
Scooby Specialist
 
Member#: 21392
Join Date: Jul 2002
Chapter/Region: Tri-State
Location: NEW YORK CITY
Vehicle:
2014 CLA 45 AMG MB
WHITE /07 STI IS SOLD

Default

Quote:
Originally Posted by avi1777 View Post
retorq means to tighten the bolts after some time/miles
YES, SO lets say it's 75 pounds of torq ,you would need to retorq them to 75 pounds.
tekfoc is offline   Reply With Quote
Old 07-04-2008, 04:52 PM   #12
avi1777
Scooby Newbie
 
Member#: 147652
Join Date: Apr 2007
Vehicle:
02 sti
white

Default

ok good to know
make sence
after how many miles usualy its recommended to retorq?
avi1777 is offline   Reply With Quote
Old 07-04-2008, 10:12 PM   #13
tekfoc
Scooby Specialist
 
Member#: 21392
Join Date: Jul 2002
Chapter/Region: Tri-State
Location: NEW YORK CITY
Vehicle:
2014 CLA 45 AMG MB
WHITE /07 STI IS SOLD

Default

Quote:
Originally Posted by avi1777 View Post
ok good to know
make sence
after how many miles usualy its recommended to retorq?
check with ARP for recommendation for when they should be retorqed .
I dont remember off hand .
tekfoc is offline   Reply With Quote
Old 07-05-2008, 06:10 PM   #14
avi1777
Scooby Newbie
 
Member#: 147652
Join Date: Apr 2007
Vehicle:
02 sti
white

Default

ok
it might be bad machined also-its converted from 2 to 2.5liter,i will know tomorow for sure
avi1777 is offline   Reply With Quote
Old 07-05-2008, 06:41 PM   #15
LiquidForce
Scooby Specialist
 
Member#: 12811
Join Date: Nov 2001
Chapter/Region: South East
Location: Roswell Ga
Vehicle:
2002 2.5l Wrx
517whp/516wtq (Stage pi)

Default

Did you assemble the motor yourself or have a shop do it?

The ARPs do need to be retorqued but you don't have to put miles on them first. That would be a serious pain on a Subaru motor since it would mean pulling the motor to get the cams out.

Do a search for the proper technique. If I remember correctly its torque to spec wait an hour and retorque to spec.
LiquidForce is offline   Reply With Quote
Old 07-06-2008, 11:27 AM   #16
avi1777
Scooby Newbie
 
Member#: 147652
Join Date: Apr 2007
Vehicle:
02 sti
white

Default

i didnt assemble anything in the car,im a drummer
http://youtube.com/watch?v=YrlsARU9ty8
avi1777 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
Major problems with turbo-back exhaust order from Renick Subaru WRXagon Vendor Reviews 2 04-12-2002 08:04 PM
OT: some major problems 98legacygt117 Legacy Forum 14 08-27-2001 05:12 PM
('93-'01) major problem/emergency with bushings install BSer Impreza Forum 9 07-04-2001 10:40 AM
major problems after alignment.. please help!! wistful Brakes, Steering & Suspension 4 06-25-2001 05:59 PM
Major problems in the General Forum subaruwrx General Forum Archive 1 12-06-2000 11:45 AM


All times are GMT -4. The time now is 06:41 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.