Welcome to the North American Subaru Impreza Owners Club Friday April 27, 2018
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 03-19-2012, 09:11 AM   #1
chevyman1968
Scooby Newbie
 
Member#: 311197
Join Date: Feb 2012
Chapter/Region: MAIC
Location: Pennsylvania
Vehicle:
1999 Legacy Outback
High Comp Dohc 11.1 to 1

Default Water pump question

I am rebuilding a 2.5 dohc this week and was wondering if I could use the water pump over? It was replaced about 40,xxx ago. I checked it over and the bearing is still good. If I can't use it over, Is it better to get a Subaru pump or go after market?
* Registered users of the site do not see these ads.
chevyman1968 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 03-19-2012, 09:25 AM   #2
Jessekrs123
Scooby Specialist
 
Member#: 236927
Join Date: Jan 2010
Chapter/Region: NESIC
Location: Oakville CT
Vehicle:
2015 BRZ 93 LEGacy33
1984 BRAT

Default

This is one of those preventative maintenance items, meaning, if you are going to have everything apart, might as well just replace it for good measure rather than having it fail prematurely before you have everything apart again.

An OE Subaru pump should be just fine, and you should replace the thermostat while you have it all apart as well. (Another preventative maintenance item)

Don't forget the gasket as well as cleaning off the mating surface, and don't forget that the water pump bolts should not be heavily torqued. Snugging them up will do just fine. Don't forget to install the thermostat right side up as well.
Jessekrs123 is offline   Reply With Quote
Old 03-19-2012, 09:28 AM   #3
Colter84
Scooby Newbie
 
Member#: 249901
Join Date: Jun 2010
Chapter/Region: AKIC
Vehicle:
2007 STi
OBP

Default

This is one of those situations that if you ask 5 people you're bound to get 5 different answers.

With that being said, some would say why not do it when you're in there since they can be had for fairly cheap, and it will obviously be a much easier job with engine out.

On the other hand, if it's only got 40k on it, there's a good chance that it could last until your next timing belt change is due.

It really just depends on your personal preference and budget. Personally I like to replace everything that I can afford when doing something like that. If you do change it you might as well put a new thermostat in it as well.
Colter84 is offline   Reply With Quote
Old 03-19-2012, 09:40 AM   #4
Patrick Olsen
NASIOC Supporter
 
Member#: 120
Join Date: Jul 1999
Chapter/Region: AKIC
Location: Where the Navy sends me...
Vehicle:
1997 Legacy 2.5GT
1996 Impreza coupe

Default

I'll provide the dissenting view and say that I would definitely re-use the pump if it's only got 40k on it. I'm well-versed on preventive maintenance - I'm in the Navy, it's how we do everything - but IMO it's entirely possible to be too preventive by addressing things that aren't a problem.
Patrick Olsen is offline   Reply With Quote
Old 03-19-2012, 09:57 AM   #5
lavid2002
Scooby Specialist
 
Member#: 226864
Join Date: Oct 2009
Location: Southern NJ
Default

Replacing a water pump at 40k is being a little anal. But on the flip side, mine failed at 55k ish
lavid2002 is offline   Reply With Quote
Old 03-19-2012, 10:03 AM   #6
chevyman1968
Scooby Newbie
 
Member#: 311197
Join Date: Feb 2012
Chapter/Region: MAIC
Location: Pennsylvania
Vehicle:
1999 Legacy Outback
High Comp Dohc 11.1 to 1

Default

Okay, I think it will really depend on how things go this week. If I have room in my budget I would prefer to replace it that way it doesn't decide to quit on me when I am driving. I do agree with Patrick though. I don't like to replace stuff if it isn't a problem, but I am also use to working on Chevy v8s where the water pump is out front and easy to get to. I was told that when you change the timing belt you do the water pump and vice versus. So, idk.
chevyman1968 is offline   Reply With Quote
Old 03-19-2012, 03:16 PM   #7
mod maniac
Scooby Specialist
 
Member#: 300551
Join Date: Nov 2011
Chapter/Region: SCIC
Location: mariposa ca.
Vehicle:
2002 FOZ STI 2.34
Fullers Garage

Default

I would also add it depends on how fast you are. if it takes you 4 or 5 hours to do a water pump than you might want to do it, if you can do it in a hour and a half then maybe not.
mod maniac is offline   Reply With Quote
Old 03-19-2012, 06:57 PM   #8
chevyman1968
Scooby Newbie
 
Member#: 311197
Join Date: Feb 2012
Chapter/Region: MAIC
Location: Pennsylvania
Vehicle:
1999 Legacy Outback
High Comp Dohc 11.1 to 1

Default

Quote:
Originally Posted by mod maniac View Post
I would also add it depends on how fast you are. if it takes you 4 or 5 hours to do a water pump than you might want to do it, if you can do it in a hour and a half then maybe not.
Since I have the engine out I will prolly just replace it. It will save me having to replace it in the car later.
chevyman1968 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
Water/meth injection water pump question atomic4877 Water/Methanol Injection, Nitrous & Intercooler Cooling 3 09-24-2009 05:29 PM
Water pump question Rocketcar Service & Maintenance 1 01-28-2006 02:41 PM
timing belt,water pump question. help WRC STYL Service & Maintenance 0 01-09-2003 06:43 PM
water pump question IggDawg Normally Aspirated Powertrain 4 07-08-2002 07:47 AM
Quick Water Pump Question BJamerican Service & Maintenance 2 12-12-2001 09:52 PM

All times are GMT -4. The time now is 04:22 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2018 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.