Welcome to the North American Subaru Impreza Owners Club Friday August 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 08-06-2008, 05:27 AM   #1
bloopsta26
Scooby Specialist
 
Member#: 131371
Join Date: Nov 2006
Chapter/Region: TXIC
Location: Belvitucky
Vehicle:
05 buy my parts so
i can get my sti running

Default Need help, valve clearance? pic included

Okay so ive ran into a problem with my build. I had gotten my motor back and well ran into some things i donno if im to sure about. here is the thing..im running cosworth 272 cams with brian crower valves/springs/retainners. we decided to measure the valve lash or clearance. this is the clearance btw the valve and the cam. here is what i got. i was bored and desided to draw it up on paint lol. im not to good but here it is ....



what would you guys do? have the guy redo them or would u run it? i need alot of help and advice....
help
* Registered users of the site do not see these ads.
bloopsta26 is offline   Reply With Quote
Old 08-06-2008, 07:17 AM   #2
Storm
Scooby Guru
 
Member#: 5218
Join Date: Mar 2001
Chapter/Region: MWSOC
Location: SAUL'S Motorsports
Vehicle:
96L Most Over-
Developed Beater

Default

Are you serious?
Storm is offline   Reply With Quote
Old 08-06-2008, 07:23 AM   #3
MartinSTi05
Scooby Specialist
 
Member#: 145145
Join Date: Apr 2007
Chapter/Region: MWSOC
Location: Rockford, Il
Vehicle:
2006 wrx STi

Default

unfortunately he is. I can almost hear the ticking now. Good luck looper.
MartinSTi05 is offline   Reply With Quote
Old 08-06-2008, 07:38 AM   #4
bloopsta26
Scooby Specialist
 
Member#: 131371
Join Date: Nov 2006
Chapter/Region: TXIC
Location: Belvitucky
Vehicle:
05 buy my parts so
i can get my sti running

Default

yeah im going to take it back to him but i just wanna know what people think of it
bloopsta26 is offline   Reply With Quote
Old 08-06-2008, 09:09 AM   #5
Mechie3
Scooby Guru
 
Member#: 120152
Join Date: Jul 2006
Chapter/Region: MWSOC
Location: Indy
Default

I don't know much about engine building, but I thought you were supposed to measure clearances and then add or remove shims (for shimmed setups) or change the buckets (for shimless bucket setups) to achieve the proper clearances.
Mechie3 is offline   Reply With Quote
Old 08-06-2008, 09:13 AM   #6
jaxscuby
Sammo Hung
Moderator
 
Member#: 10613
Join Date: Sep 2001
Chapter/Region: South East
Location: F L O R I D A
Vehicle:
2002 USDM WRX
WRB

Default

take them back or you could just get different buckets and
do it yourself.
jaxscuby is offline   Reply With Quote
Old 08-07-2008, 03:47 AM   #7
rlavalle
Scooby Specialist
 
Member#: 18384
Join Date: May 2002
Location: Seattle 'burb (Kirkland)
Vehicle:
2004 STi: 580 AWHP
Java Black Pearl

Default

Did you torque the heads to the block before measuring them? Clearance can change when torqued down. Cosworth mentions this in their build docs.
rlavalle is offline   Reply With Quote
Old 08-08-2008, 07:36 PM   #8
charliew
Scooby Specialist
 
Member#: 125304
Join Date: Sep 2006
Location: Crawford, TX.
Default

This gave me the thought that maybe the thicker headgaskets from cosworth might be getting torqued and the crush is slightly different after the heads are torqued pulling the heads down more or less differently.
charliew is offline   Reply With Quote
Old 08-08-2008, 07:43 PM   #9
MartinSTi05
Scooby Specialist
 
Member#: 145145
Join Date: Apr 2007
Chapter/Region: MWSOC
Location: Rockford, Il
Vehicle:
2006 wrx STi

Default

Quote:
Originally Posted by charliew View Post
This gave me the thought that maybe the thicker headgaskets from cosworth might be getting torqued and the crush is slightly different after the heads are torqued pulling the heads down more or less differently.
A thouhght. I wonder if it would really matter that much though? I don't think the yield of the surface will change, all your doing is making a slightly thicker MLS section. I am not sure the crush properties too much, otherwise you would have mucho sealing issues on thicker head gaskets. Only the terminal layers of the laminate have a crush ring if memory serves. Otherwise the intermediate layers are simply stamped steel, with nothing other than holes punched for coolant flow.
MartinSTi05 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
Need 2 Part numbers, Pic included Jus Blaze Private 'Wanted' Classifieds 6 04-16-2009 10:40 AM
need local help, valve clearance problem bloopsta26 Mid West Subaru Owners Club Forum -- MWSOC 11 08-12-2008 03:15 AM
Need HELP!! valve stem question? g-man Tire & Wheel 3 11-28-2007 12:45 AM
Need help locating 22b pic going sideways in higher resolution latinskllz General Community 20 10-24-2002 09:01 AM


All times are GMT -4. The time now is 06:07 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.