Welcome to the North American Subaru Impreza Owners Club Thursday May 26, 2016
Home Forums 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.
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 09-28-2010, 08:11 PM   #1
kamilitaryman
Scooby Newbie
 
Member#: 228284
Join Date: Oct 2009
Default EJ25 rebuild - need advice from RS veterans

Ok here's the story:

My 2000 Impreza 2.5 RS is losing coolant. It overheated badly about a month ago and it's been "sipping" coolant every time I drive it. I changed my oil last week and found that it was chocolate/cream colored meaning that coolant is definately getting into my block. I'm suspecting a bad head gasket that's been pushed past it's limits as the EJ25 SOHC had a head gasket issue straight out of the factory. This is my 2nd rodeo with engine tear downs, here's my 1st (still in progress) - I'm in the middle of another build that's being put on the back burner http://www.ka-t.org/forums/viewtopic.php?t=40793&start=0

Anyways, this weekend I want to take the motor out, tear it down and rebuild it. This is where I ask you RS veterans to chime in:

Eventually, and I mean in about 2 years or so I will turbocharge this motor with a small turbo @ 5-7psi. Quick spool with little extra pep for daily/winter driver. I want to rebuild this motor to be able to handle boost but at the same time keep the components stock or as close to stock as possible so when I install the engine back in the car it will be a drop-in, fire-it-up affair for N/A driveability for about 2 years (until I turbo). This will give it plenty of time for brake-in.

I want to at least replace the pistons with forged ones to give myself a little peace of mind for when I actually turbo it. Can I keep stock compression for 5-7 psi? How do you guys think the rods will handle 5-7 psi?

How about rebuild kits? What is the best place on the net to purchase the EJ25 rebuild kits (seals, bearings, gaskets etc etc) and how much do they run for? Any known and reputable brands that you guys swear by? How about timing belt kits?

I want to make this motor reliable and fun once I turbo it. Help a brotha out! I will continue my search as well, I dont expect to be spoon fed info here
* Registered users of the site do not see these ads.
kamilitaryman is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 10-22-2015, 07:00 PM   #2
jonathan9586
Scooby Newbie
 
Member#: 432396
Join Date: Oct 2015
Location: Michigan
Vehicle:
2002 2.5RS
Black

Default

not much of a veteran on this as i am in the process of rebuilding my 2002 2.5RS. the best rebuild kit that i have came across is from the full rebuild kit from rockauto.com, $450 (full gaskets, bearings, seals, pistons, oil pump, timing belt) + new head bolts (need em).

i was just scanning through the forums to get some torque specs from assembly once i get the halves & heads back from the machine shop. i will go ahead and subscribe to this. i need all the info i can get also.
jonathan9586 is offline   Reply With Quote
Old 10-22-2015, 11:37 PM   #3
Andrewxxcarlson
Scooby Specialist
 
Member#: 316415
Join Date: Apr 2012
Location: Elk Grove, CA
Vehicle:
2006 WRX
WRB

Default

I just got done rebuilding my 01 rs.

I saw rockauto gasket set but passed due to not knowing DNJ very well. I went with a felpro head gasket set, comes with headgaskets, valve cover, intake Mani and exhaust gaskets, valve seals and cam seals, for like 120. I bought OEM from Subaru water pump and gasket, and every gasket in the block, and spark plugs. Everything was in spec at the machine shop so I bought a standard size set of acl main and rod bearings from rallysportdirect. Reused my pistons and rings as I didn't not have my walls honed. Sti rods and pistons will handle 7 psi. BTW gates timing belt kit, rockauto got a solid price.
Andrewxxcarlson is offline   Reply With Quote
Old 10-24-2015, 08:38 PM   #4
keyoutback
Scooby Newbie
 
Member#: 432846
Join Date: Oct 2015
Location: Irvine, CA
Vehicle:
2001 Outback

Default

I second RockAuto for the Gates belt kit, and Summit had the best prices on the Felpro MLS headset.
keyoutback is offline   Reply With Quote
Old 11-11-2015, 03:01 PM   #5
landoficensnow
Scooby Newbie
 
Member#: 332534
Join Date: Sep 2012
Location: Vermont
Vehicle:
2013 WRX Hatch

Default

Is everyone cool with going with Gates? I've heard the blue belts have caused issues.
landoficensnow is offline   Reply With Quote
Old 11-12-2015, 02:36 AM   #6
Andrewxxcarlson
Scooby Specialist
 
Member#: 316415
Join Date: Apr 2012
Location: Elk Grove, CA
Vehicle:
2006 WRX
WRB

Default

Go gates, don't get the racing belt though.
Andrewxxcarlson is offline   Reply With Quote
Old 11-12-2015, 10:44 AM   #7
GEE-OTTO
Scooby Specialist
 
Member#: 201277
Join Date: Jan 2009
Chapter/Region: MAIC
Location: Arlington VA
Vehicle:
2009 Legacy GT
OBP

Default

Go gates but go with a OEM thermo as the gates one is trash.
GEE-OTTO is offline   Reply With Quote
Old 11-12-2015, 01:32 PM   #8
razor7
Scooby Newbie
 
Member#: 433899
Join Date: Nov 2015
Location: Northern California
Vehicle:
2000 RSTI

Default

Quote:
Originally Posted by GEE-OTTO View Post
Go gates but go with a OEM thermo as the gates one is trash.
Pretty much this.

Gates belt, OEM water pump, OEM idlers, tensioner, pulleys.

I'd also recommend STI MLS head gaskets. If you do a search, you can get more info. I forget the cutoff for when they switched over to MLS head gaskets, but they are much less prone to seeping and oil leakage. I updated mine on a 2000 2.5RS and have had it running strong for ~60k miles - definitely worth it.

-TC
razor7 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
Advice from Outback Veterans grambo Outback Forum 4 11-19-2007 12:56 AM
ej25 rebuild. need part numbers for SOHC belts! opious Normally Aspirated Powertrain 3 09-17-2007 04:10 PM
Warranty work needed on a "Brand New Car." Need advice from SoCal people. Jelphree Southern California Impreza Club Forum -- SCIC 49 05-17-2006 12:36 PM
Advice from RS-T owners? gould9184 Normally Aspirated with bolt-on Forced Induction Powertrain 44 05-20-2004 03:26 PM
need advice from someone who knows 98 rs lotion Normally Aspirated Powertrain 5 09-12-2002 05:06 AM

All times are GMT -4. The time now is 05:19 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2016 Axivo Inc.
Copyright ©1999 - 2016, North American Subaru Impreza Owners Club, Inc.