Welcome to the North American Subaru Impreza Owners Club Saturday September 5, 2015
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 > Pre-2002 Factory Turbo 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 05-04-2009, 11:33 PM   #1
supernick77
Scooby Newbie
 
Member#: 145122
Join Date: Apr 2007
Chapter/Region: MAIC
Location: Lock Haven or Beaver pa
Vehicle:
1999 99 lgt, 86 brat
black, lt blue

Default getting a piston bored questions????

i have an 02 wrx 2.0t engine that had a burned up piston. i tore it down and it is at the mechine and they said that it will need to be bored out to the next size over. they asked me what the factory askes for skirt and ring gaps. i called the dealer and they said they dont know. also i asked around and i have been told that only one over on 1 piston is fine for balence. not ideal but fine.
* Registered users of the site do not see these ads.

Last edited by supernick77; 05-04-2009 at 11:49 PM. Reason: this needs moved to 2.0 turbo page. sorry
supernick77 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 05-04-2009, 11:50 PM   #2
theotherguy
Scooby Specialist
 
Member#: 191514
Join Date: Oct 2008
Chapter/Region: NWIC
Location: teh bremerton
Vehicle:
'05 FXT 6spd, 98
Fozzy lifted,'01 RS 6spd

Default

I'd never do it but sometimes you have to do what you need to do. No way to pull off all 4?
theotherguy is offline   Reply With Quote
Old 05-04-2009, 11:50 PM   #3
supernick77
Scooby Newbie
 
Member#: 145122
Join Date: Apr 2007
Chapter/Region: MAIC
Location: Lock Haven or Beaver pa
Vehicle:
1999 99 lgt, 86 brat
black, lt blue

Default please move to 2.0 turbo

please
supernick77 is offline   Reply With Quote
Old 05-04-2009, 11:52 PM   #4
supernick77
Scooby Newbie
 
Member#: 145122
Join Date: Apr 2007
Chapter/Region: MAIC
Location: Lock Haven or Beaver pa
Vehicle:
1999 99 lgt, 86 brat
black, lt blue

Default

trying to save money. unless i found i killer deal on all 4 oversized
supernick77 is offline   Reply With Quote
Old 05-05-2009, 08:22 AM   #5
Rokkit
Scooby Specialist
 
Member#: 84181
Join Date: Mar 2005
Chapter/Region: NESIC
Location: CT
Vehicle:
NASA #530 GTS2

Default

I would be concerned that you'd be doing all this work for nothing. I can not give you an engineering answer on whether it's safe or not, but from my experience I've always did all or nothing. Doing 1 may upset the balance just enough to cause premature failure of other parts (IE bearings) and then you'll be doing this all over again wishing you found the extra 100$ to just do all 4.

Anyone else have a more... technical answer?
Rokkit is offline   Reply With Quote
Old 05-05-2009, 02:35 PM   #6
supernick77
Scooby Newbie
 
Member#: 145122
Join Date: Apr 2007
Chapter/Region: MAIC
Location: Lock Haven or Beaver pa
Vehicle:
1999 99 lgt, 86 brat
black, lt blue

Default

i wish it was only another $100. from subaru pistons are $75 each and then the cost to have all 4 bored vs 1. where else can i get 4 pistons. all the ones i have seen are 450 500 for a set. also anyone know what the tolerences are on the gaps?
supernick77 is offline   Reply With Quote
Old 05-05-2009, 05:21 PM   #7
quadtard
Scooby Specialist
 
Member#: 104206
Join Date: Jan 2006
Chapter/Region: South East
Location: Springfield, TN
Vehicle:
2004 WRX
Tunnel Ram Gray

Default

find a blown ej205 with good cylinders. you can find plenty of spun bearing motors on here for dirt cheap. put your crank, rods and new pistons in there. simplest and cheapest solution.

Its not the best way, but its better than throwing your motor way out of balance.
quadtard is offline   Reply With Quote
Old 05-05-2009, 06:15 PM   #8
jhull
Scooby Newbie
 
Member#: 114359
Join Date: May 2006
Default

I wouldnt try to bore out only one cylinder. I agree either get another block or get 4 new pistons.
jhull is offline   Reply With Quote
Old 05-07-2009, 11:07 AM   #9
WRX34
Scooby Specialist
 
Member#: 13364
Join Date: Dec 2001
Chapter/Region: MWSOC
Location: MI
Vehicle:
1996 GM8 caged,
99 V8 RSTi, 11' FXT

Default

Buy all 4 pistons. Get an aftermarket oversized set (not JP). Then give them to your engine builder and they'll build it to spec of the pistons. No sense in boring out the damn block before you even have pistons!

Judging by your complaining of paying $75 for a piston and even contemplating replacing one vs all 4 you are wasting your time thinking about rebuilding. You'll end up spending more on gaskets, headstuds, seals, etc. than you have a clue about. Don't waste your time or money if you're short on cash. Go drop in a used motor that runs w/ low mileage. It'll be cheaper. Unless you have at least $1k set aside for a super cheap rebuild. Or do what quadtard said...
WRX34 is offline   Reply With Quote
Old 05-07-2009, 11:58 AM   #10
AWDWRXLOVER
Scooby Specialist
 
Member#: 50267
Join Date: Dec 2003
Chapter/Region: SWIC
Vehicle:
02 built hybrid
sr55/meth/sick speed

Default

listen to him^
AWDWRXLOVER is offline   Reply With Quote
Old 05-07-2009, 02:57 PM   #11
supernick77
Scooby Newbie
 
Member#: 145122
Join Date: Apr 2007
Chapter/Region: MAIC
Location: Lock Haven or Beaver pa
Vehicle:
1999 99 lgt, 86 brat
black, lt blue

Default

i am going for all 4 now. i was just trying to save money at each step so it dosnt get out of control. the reason i asked is an over sized piston is only .5 mm bigger. with the way subarus run i didn't think it would even notice. i guess im in the market for 4 oversized pistons if anyone knows of some. i have an add in the wanted section.
supernick77 is offline   Reply With Quote
Old 06-16-2009, 01:23 AM   #12
backslider
Scooby Specialist
 
Member#: 43196
Join Date: Sep 2003
Chapter/Region: TXIC
Location: Baked Goods Powder Coating
Vehicle:
1999 STi Type R
93GF 95GC 02GD 01SF-T

Default

also if your machinist cant figure up ring end gaps and what not, take it somewhere else.
backslider is online now   Reply With Quote
Old 06-21-2009, 01:13 AM   #13
DSM_Outback
Scooby Specialist
 
Member#: 56345
Join Date: Mar 2004
Location: Western Colorado
Vehicle:
93 Swapped L
Green

Default

Quote:
Originally Posted by supernick77 View Post
getting a piston bored questions????
Read something by Ayn Rand to it.
DSM_Outback 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
EJ25 Block Halves w/ 100mm piston bore XanRules Engine/Power/Exhaust 66 01-08-2011 09:56 PM
Piston bore Prevent Built Motor Discussion 3 09-25-2009 03:01 PM
Mahle pistons/ bore question ovedrivex Built Motor Discussion 5 01-08-2007 01:23 AM
('93-'01) Since it's getting a bit boring, how about coupe or sedan debate? danc Impreza Forum 55 05-07-2002 06:48 PM
Need to get new piston rings, where to get? Andrew Normally Aspirated with bolt-on Forced Induction Powertrain 4 02-06-2002 02:00 PM


All times are GMT -4. The time now is 11:27 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2015, North American Subaru Impreza Owners Club, Inc.