Welcome to the North American Subaru Impreza Owners Club Tuesday July 29, 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 03-26-2009, 12:24 PM   #1
madmax718
Scooby Specialist
 
Member#: 172501
Join Date: Feb 2008
Default Reusing Head Gaskets

May seem silly, and I have a set of new already, but...

can you reuse a set of MLS head gaskets? (in particular, I have the 4 layer subaru oem). Its for the same block.

It was only on for 200 miles. when I took it off, it looked new, no deformation, no shape change.. not even a dent.
* Registered users of the site do not see these ads.
madmax718 is offline   Reply With Quote
Old 03-26-2009, 12:26 PM   #2
quadtard
Scooby Specialist
 
Member#: 104206
Join Date: Jan 2006
Chapter/Region: South East
Location: Springfield, TN
Vehicle:
2004 WRX
Tunnel Ram Gray

Default

I wouldn't chance, especially if you have new ones. The amount of time it takes to replace them(if they go bad) is enough to make me put new ones on for piece of mind.
quadtard is offline   Reply With Quote
Old 03-26-2009, 12:35 PM   #3
madmax718
Scooby Specialist
 
Member#: 172501
Join Date: Feb 2008
Default

That was my train of thought. Thats why I have new ones. Just seems like such a waste to toss a set of gaskets that might be reusable.
madmax718 is offline   Reply With Quote
Old 03-26-2009, 01:05 PM   #4
wgknestrick
Scooby Specialist
 
Member#: 32576
Join Date: Feb 2003
Location: Allentown, PA
Vehicle:
04 STI
Roller Barrel ITBS

Default

Why would you ever, ever, ever think of doing this? You shouldn't even reuse head bolts, but the head gasket........
wgknestrick is offline   Reply With Quote
Old 03-26-2009, 01:05 PM   #5
MrSlowbaru
Scooby Specialist
 
Member#: 129231
Join Date: Oct 2006
Chapter/Region: Tri-State
Location: Long Island NY
Vehicle:
2005 wrx
cgm

Default

def use your better judgement, and use new ones
MrSlowbaru is offline   Reply With Quote
Old 03-26-2009, 03:07 PM   #6
madmax718
Scooby Specialist
 
Member#: 172501
Join Date: Feb 2008
Default

Quote:
Originally Posted by wgknestrick View Post
Why would you ever, ever, ever think of doing this? You shouldn't even reuse head bolts, but the head gasket........
it saves 30 bucks toward another rebuild?

I have it, just ,.. you know, why waste something that can potentially be reused?
madmax718 is offline   Reply With Quote
Old 03-26-2009, 05:11 PM   #7
reddevil
Scooby Guru
 
Member#: 64673
Join Date: Jun 2004
Chapter/Region: NWIC
Location: portland
Vehicle:
1990 Legacy wagon
goes 12.387 @ 116.5

Default

I have done it a few times, and no issues. But the one time I was FORCED to reuse one it failed.

Even I, king of cheap, buy new headgaskets.
reddevil is offline   Reply With Quote
Old 03-26-2009, 10:06 PM   #8
wgknestrick
Scooby Specialist
 
Member#: 32576
Join Date: Feb 2003
Location: Allentown, PA
Vehicle:
04 STI
Roller Barrel ITBS

Default

Quote:
Originally Posted by madmax718 View Post
it saves 30 bucks toward another rebuild?

I have it, just ,.. you know, why waste something that can potentially be reused?
wgknestrick is offline   Reply With Quote
Old 03-26-2009, 10:19 PM   #9
Brydon
Scooby Specialist
 
Member#: 107569
Join Date: Feb 2006
Chapter/Region: NWIC
Location: Portland, OR
Vehicle:
1998 Forester S
SRP

Default

Quote:
Originally Posted by wgknestrick View Post
Why would you ever, ever, ever think of doing this? You shouldn't even reuse head bolts, but the head gasket........
Why does everyone say never reuse head bolts?? I've done this at least 20 times with no issue and cars up to about 500whp. Does anyone see problem reusing bolts?
Brydon is offline   Reply With Quote
Old 03-26-2009, 10:22 PM   #10
Abest10
Scooby Specialist
 
Member#: 190962
Join Date: Oct 2008
Chapter/Region: MWSOC
Location: Ohio
Vehicle:
00 STM RS
04 FXT

Default

You never reuse headgaskets.
Abest10 is offline   Reply With Quote
Old 03-26-2009, 10:37 PM   #11
madmax718
Scooby Specialist
 
Member#: 172501
Join Date: Feb 2008
Default

You can reuse head bolts, but there is an overall length that needs to be checked. Sometimes they stretch, other times, they dont. Just variances in the metal.

Head gasket.. Lets just say Im not going to use it, but, Im not throwing it away either. Might need it for a rainy track side rebuild or something...
madmax718 is offline   Reply With Quote
Old 03-26-2009, 10:42 PM   #12
edo2000
Scooby Specialist
 
Member#: 68709
Join Date: Aug 2004
Chapter/Region: AKIC
Location: Kenai Peninsula, AK
Vehicle:
2012 WRX
red

Default

Quote:
Originally Posted by Brydon View Post
Why does everyone say never reuse head bolts?? I've done this at least 20 times with no issue and cars up to about 500whp. Does anyone see problem reusing bolts?
One school of thought says that the bolts can fatigue/elongate/weaken by being installed more than once. It never made sense to me for applications where you are staying somewhere in the same ballpark as stock power. I too have reused headbolts successfully.

On the other hand, if you are more than doubling stock power (500whp), maybe you need aftermarket headbolts for strength....
edo2000 is offline   Reply With Quote
Old 03-26-2009, 11:06 PM   #13
Brydon
Scooby Specialist
 
Member#: 107569
Join Date: Feb 2006
Chapter/Region: NWIC
Location: Portland, OR
Vehicle:
1998 Forester S
SRP

Default

Quote:
Originally Posted by edo2000 View Post
One school of thought says that the bolts can fatigue/elongate/weaken by being installed more than once. It never made sense to me for applications where you are staying somewhere in the same ballpark as stock power. I too have reused headbolts successfully.

On the other hand, if you are more than doubling stock power (500whp), maybe you need aftermarket headbolts for strength....
Strength, maybe. The stock ej257 rods failed after about 50,000ish miles of excessive power but never had gasket issues. I now use ARP bolts mostly because my stock bolts are in my other car which is under 300whp I would guess.

Anyway when I started college I wanted to do mechanical engineering but then switched to Electrical Engineering. I remember playing in the strength of materials lab with metal and stretching them. I'm sure there are a lot of people that know a lot more but I believe that the type of metal the factory bolts use can be stretched over and over without an issue. The only issue I would think could happen would be if the bolts were severely over torqued the metal would deform and could not be reused. Since I have been the only one to use my bolts I trust that this has not happened.
Brydon is offline   Reply With Quote
Old 03-27-2009, 07:29 AM   #14
Storm
Scooby Guru
 
Member#: 5218
Join Date: Mar 2001
Chapter/Region: MWSOC
Location: SAUL'S Motorsports
Vehicle:
96L Most Over-
Developed Beater

Default

HEADGASKETS PEOPLE...........HEADGASKETS.

There are dozens of threads regarding the reuse of headbolts. We don't need another one.


I've reused MLS gaskets once, but they had only been torqued(incorrectly)....not run through a heat cycle. It probably boils down to just how cheap you wanna be. It's not even frugal if you save the $$$ here but pay even more later if they fail. You're always going to question them if you reuse them and they work out..... You'll have more confidence if you just replace them. Recycle the metal if throwing them out bothers you. I'm kind of the same way.....hate to pitch or replace something that is for the most part, still good. That's why my garage looks like Sanford & Sons house! Headgaskets are just one of those places that is not worth chancing it.

Jay
Storm 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
FS : STi intake manifold and throttle body jcovey2.5 Engine/Power/Exhaust 173 12-05-2011 09:38 PM
reuse exhaust gaskets? wiresix17 Newbies & FAQs 8 09-22-2009 02:38 AM
reusing head bolts hypoxvi Factory 2.0L Turbo Powertrain 16 04-01-2009 06:22 AM
Is torqueing down the head, then removing the head, considered reusing the gasket? mokujin22 Built Motor Discussion 8 10-20-2006 08:29 AM
Opinions needed: Reusing Exhuast Gasket Zongo Factory 2.0L Turbo Powertrain 11 10-28-2003 08:20 AM


All times are GMT -4. The time now is 12:12 AM.


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.