Welcome to the North American Subaru Impreza Owners Club Thursday September 18, 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 General > Newbies & FAQs

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 02-24-2011, 02:03 PM   #1
nwisti
Scooby Newbie
 
Member#: 266472
Join Date: Dec 2010
Chapter/Region: MWSOC
Location: Valparaiso, Indiana
Vehicle:
2005 Sti
blackkk

Default OEM head stud and cam cap torque specs?

Ive searched and searched, all i get is a bunch of fs ads etc.

ej257 oem head stud torque specs/sequence
AND
all the cam cap bolt torque specs/sequence

anyone?

Thanks in advance.
* Registered users of the site do not see these ads.
nwisti is offline   Reply With Quote
Old 02-25-2011, 08:54 AM   #2
nwisti
Scooby Newbie
 
Member#: 266472
Join Date: Dec 2010
Chapter/Region: MWSOC
Location: Valparaiso, Indiana
Vehicle:
2005 Sti
blackkk

Default

I guess this isn't an FAQ section. what was i thinking? .....
nwisti is offline   Reply With Quote
Old 02-25-2011, 09:58 AM   #3
CHwrx
Scooby Newbie
 
Member#: 69764
Join Date: Sep 2004
Location: Liverpool,NY
Vehicle:
01,2 2.5 rs, WRX
PSM

Default

baleeted

Last edited by Unabomber; 02-25-2011 at 12:40 PM. Reason: illegal
CHwrx is offline   Reply With Quote
Old 02-25-2011, 01:58 PM   #4
drewvdw
Scooby Guru
 
Member#: 255776
Join Date: Aug 2010
Chapter/Region: MWSOC
Location: Laramie, WY
Vehicle:
2010 LR WRX
MPS powered.

Default

ok, assuming this is for your 05 STI, the order goes as follows according to Mitchell:
10, 6, 2, 3, 7
9, 5, 1, 4, 8
<- front of vehicle
according to alldata:
Cylinder head bolts:
1) Apply a coat of engine oil to washers and bolt threads.


2) Tighten all bolts in sequence to 29 Nm (3.0 kgf-m, 22 ft. lbs.)

3) Retighten all bolts in sequence to 69 Nm (7.0 kgf-m, 51 ft. lbs.)
4) Back off all bolts by 180first, then back them off a further 180, in the reverse sequence they were tightened.

5) Tighten all bolts in sequence to 49 Nm (5.0 kgf-m, 36 ft. lbs.)

6) Tighten all bolts in sequence to 80 - 90

7) Tighten all bolts in sequence a further 40 - 45

NOTE: Do not tighten bolts for more than 45.


alldata is showing only 6 bolts though, i think those are for the camshaft...can anyone confirm?
drewvdw is offline   Reply With Quote
Old 02-27-2011, 11:02 AM   #5
nwisti
Scooby Newbie
 
Member#: 266472
Join Date: Dec 2010
Chapter/Region: MWSOC
Location: Valparaiso, Indiana
Vehicle:
2005 Sti
blackkk

Default

drewvdw, much appreciated! 34 ft lbs sounds like a lot for cam cap bolts doesn't it?
nwisti is offline   Reply With Quote
Old 03-04-2011, 08:58 AM   #6
CHwrx
Scooby Newbie
 
Member#: 69764
Join Date: Sep 2004
Location: Liverpool,NY
Vehicle:
01,2 2.5 rs, WRX
PSM

Default

yea cam cap bolts only tighten to 10 lbs you go to 34 and you'll have huge issues. be very careful as cam cap bolts don't need alot of torque. to much and you'll snap it. That means you have to get a easy out to get base of screw out of head. Then you have to tap and helicoil it. i had to do this because the 02 service manual had all the caps on 14 pounds and snapped one of the back bolts. The manual was printed wrong and I didn't find correct torque spec till after. the aluminum is really soft so go easy. tighten a little and check then tighten more. I tightened my front caps to 10-12 and the back 2 to 7. tighten and see how the cam moves. if to tight back off a little. cam should move back and forth very smooth not binding or the cam should not require much force to move. and remember to put oil on the cam where the cam sits over it.
CHwrx is offline   Reply With Quote
Old 03-04-2011, 09:06 AM   #7
Bad Noodle
Scooby Specialist
 
Member#: 174442
Join Date: Mar 2008
Chapter/Region: Tri-State
Location: NNJ
Vehicle:
2007 SuperWagon
I don't spell well

Default

From what i remember the front cam cap bolts (the "different" front most bolts) are 14ft-lbs while the other 8 are 21-lbs
Bad Noodle is online now   Reply With Quote
Old 03-04-2011, 10:14 AM   #8
the suicidal eggroll
Scooby Guru
 
Member#: 51961
Join Date: Jan 2004
Chapter/Region: RMIC
Location: Broomfield, CO
Vehicle:
2005 STi
2012 WRX

Default

Why is everyone guessing at this? The FSM has all of this info and is widely available from multiple sources all of which are illegal except from http://techinfo.subaru.com/

Last edited by Unabomber; 03-04-2011 at 02:57 PM.
the suicidal eggroll is offline   Reply With Quote
Old 04-16-2011, 05:30 PM   #9
cartoonlife
Scooby Specialist
 
Member#: 204291
Join Date: Feb 2009
Chapter/Region: BAIC
Location: Central CA
Vehicle:
07 UGM STi Ltd
2012 Prius

Default EJ257 OEM headstuds and cam cap torque specs

FWIW here you go

OEM head studs

INSTALLATION
1) Install the cylinder head and gaskets on cylinder
block.
NOTE:
Use new cylinder head gaskets.
Be careful not to scratch the mating surface of
cylinder head and cylinder block.
2) Tighten the cylinder head bolts.
(1) Apply a coat of engine oil to the washers and
bolt threads.
(2) Tighten all bolts to 29 Nm (3.0 kgf-m, 22 ftlb)
in alphabetical sequence.
(3) Tighten all bolts to 69 Nm (7.0 kgf-m, 51 ftlb)
in alphabetical sequence again.
(4) Back off all bolts by 180 first; back them off
by 180 again in reverse order of installation.
(5) Tighten all bolts to 49 Nm (5.0 kgf-m, 36 ftlb)
in alphabetical sequence.
(6) Tighten all bolts 80 to 90 in alphabetical sequence.
(7) Tighten all bolts by 40 to 45 in alphabetical
sequence again.
NOTE:
Do not tighten the bolts by more than 45.
(8) Further tighten all bolts (A) and (B) by 40 to
45.
NOTE:
Ensure that the total re-tightening angle in the
previous two steps do not exceed 90.

pattern:





Camshaft Caps

Tightening torque:
T1: 10 Nm (1.0 kgf-m, 7 ft-lb)
T2: 20 Nm (2.0 kgf-m, 14.5 ft-lb)

pattern:
cartoonlife is offline   Reply With Quote
Old 07-10-2011, 05:32 PM   #10
ravenlunatic
Scooby Specialist
 
Member#: 180601
Join Date: May 2008
Chapter/Region: BAIC
Location: Bay area
Vehicle:
2003 PSM WRX
(>")>==HADOKEN==<(o)

Default

sorry to dig this one up.

does anyone know how much torque for the head studs them selves? (when instaling on block)
ravenlunatic is offline   Reply With Quote
Old 07-10-2011, 09:24 PM   #11
the suicidal eggroll
Scooby Guru
 
Member#: 51961
Join Date: Jan 2004
Chapter/Region: RMIC
Location: Broomfield, CO
Vehicle:
2005 STi
2012 WRX

Default

Quote:
Originally Posted by ravenlunatic View Post
sorry to dig this one up.

does anyone know how much torque for the head studs them selves? (when instaling on block)
OEM doesn't use studs and nuts, it uses bolts
the suicidal eggroll is offline   Reply With Quote
Old 07-11-2011, 02:09 AM   #12
ravenlunatic
Scooby Specialist
 
Member#: 180601
Join Date: May 2008
Chapter/Region: BAIC
Location: Bay area
Vehicle:
2003 PSM WRX
(>")>==HADOKEN==<(o)

Default

Ok, anyone running APR head studs know the specs?
ravenlunatic is offline   Reply With Quote
Old 07-11-2011, 07:35 AM   #13
RP31
Scooby Specialist
 
Member#: 123574
Join Date: Aug 2006
Chapter/Region: MWSOC
Location: Lisle, IL
Vehicle:
2005 2.6L 9:1 425WHP
CGM STi

Default

It depends on the actual studs you bought, and the spec is (or should have been) included in the box with the studs. Last I did was 90 ft. lbs in 3 increments (30, 60, 90) using the provided lube on the nuts and washers.
RP31 is offline   Reply With Quote
Old 07-11-2011, 11:35 AM   #14
the suicidal eggroll
Scooby Guru
 
Member#: 51961
Join Date: Jan 2004
Chapter/Region: RMIC
Location: Broomfield, CO
Vehicle:
2005 STi
2012 WRX

Default

Quote:
Originally Posted by RP31 View Post
It depends on the actual studs you bought, and the spec is (or should have been) included in the box with the studs. Last I did was 90 ft. lbs in 3 increments (30, 60, 90) using the provided lube on the nuts and washers.
He's referring to the torque spec of the studs into the block, not the nuts onto the studs.

There is no torque spec for the studs. It's supposed to be "finger tight", but I found that small imperfections in the threads or dirt in the block kept them from threading in all the way just doing it by hand, so I used a hex key to thread them all the way until they bottomed out, then backed them off just a hair, then went finger tight from there.
the suicidal eggroll is offline   Reply With Quote
Old 07-18-2011, 03:18 PM   #15
ravenlunatic
Scooby Specialist
 
Member#: 180601
Join Date: May 2008
Chapter/Region: BAIC
Location: Bay area
Vehicle:
2003 PSM WRX
(>")>==HADOKEN==<(o)

Default

awsome! thanks for the help guys! the ARP's came with the car, i'm rebuilding the engine from the bottom up and with lilltle to no experience at all. I'm looking up al the info I can and reading as many manuals about the ej20 and ej257 as i can.

I've got a new short block with forgerd internals and a gasket kit, both from Outfront Motorsports on the way. It was a pretty penny so I'd hate to do something stupid on the rebuild and mess it all up. Anymore info or site sugestions to get mor info would be appreciated.

again, thanks for your help
ravenlunatic is offline   Reply With Quote
Old 07-18-2011, 03:27 PM   #16
fastnoypi
Scooby Specialist
 
Member#: 6886
Join Date: May 2001
Chapter/Region: Tri-State
Vehicle:
MY01 EJ207 HTA35r
nothing to see, i'm stock

Default

I think the regular ARP and ARP L19 studs have different torque specs. If in doubt which ones you have, call ARP up. Their tech line is really helpful.
btw, for regular ARP studs, tighten in 3 increments. 30ft/lbs, 60, 90. And use a generous amount of the ARP molly lube.
fastnoypi is online now   Reply With Quote
Old 06-08-2013, 11:35 PM   #17
vicky_808
Scooby Newbie
 
Member#: 254699
Join Date: Aug 2010
Chapter/Region: South East
Location: Tampa, FL
Vehicle:
2011 STi, 05 FXT
Red, Sliver

Default

Quote:
Originally Posted by RP31 View Post
It depends on the actual studs you bought, and the spec is (or should have been) included in the box with the studs. Last I did was 90 ft. lbs in 3 increments (30, 60, 90) using the provided lube on the nuts and washers.
That's correct I just done mine today.
vicky_808 is offline   Reply With Quote
Old 08-12-2013, 03:04 PM   #18
NC_2.5gt
Scooby Newbie
 
Member#: 364653
Join Date: Aug 2013
Default

Quote:
Originally Posted by cartoonlife View Post

Camshaft Caps

Tightening torque:
T1: 10 Nm (1.0 kgf-m, 7 ft-lb)
T2: 20 Nm (2.0 kgf-m, 14.5 ft-lb)

pattern:
Does anyone have the part number for the camshaft cap bolts? The ones listed in this diagram as T2??
NC_2.5gt is offline   Reply With Quote
Old 08-12-2013, 09:38 PM   #19
vicky_808
Scooby Newbie
 
Member#: 254699
Join Date: Aug 2010
Chapter/Region: South East
Location: Tampa, FL
Vehicle:
2011 STi, 05 FXT
Red, Sliver

Default

Quote:
Originally Posted by vicky_808 View Post
That's correct I just done mine today.
When I did mine back a few months ago we did the same..
vicky_808 is offline   Reply With Quote
Old 12-24-2013, 08:22 PM   #20
Fat Black Pig Sac
Scooby Specialist
 
Member#: 247911
Join Date: May 2010
Chapter/Region: BAIC
Location: Sacramento , CALI
Vehicle:
2005 obp WRX
color: HUMMER H2 WHITE

Default

does anyone have tq specs for 2005 WRX EJ20 engine?
Fat Black Pig Sac is offline   Reply With Quote
Old 12-24-2013, 08:52 PM   #21
i_c_the_light
Scooby Guru
 
Member#: 88618
Join Date: Jun 2005
Chapter/Region: SCIC
Location: New Zealand
Vehicle:
1994 Legacy
"The Silver Slug"

Default

Quote:
Originally Posted by Fat Black Pig Sac View Post
does anyone have tq specs for 2005 WRX EJ20 engine?
They're the same. Bloody hell I didn't even use a torque wrench on mine.
i_c_the_light 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
STI Heads - 4x Lost cam caps and 1x damaged AVCS Bracket / font cam cap dexterous Built Motor Discussion 18 07-11-2010 05:45 PM
wtb sti oem head studs, main bolts and more Ray@revitup Private 'Wanted' Classifieds 3 09-05-2008 12:00 PM
Ver8 Heads /w head studs and WRX head castings subydude Private 'For Sale' Classifieds 10 04-28-2006 04:27 PM
Camshaft cap torque specs? FSM discrepancy? jblaine Factory 2.0L Turbo Powertrain 4 06-14-2005 10:01 PM
Head Bolts & Cams Bolts Torque Specs Imprezd Factory 2.0L Turbo Powertrain 3 03-20-2003 07:30 AM


All times are GMT -4. The time now is 07:38 PM.


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.