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Old 08-07-2007, 11:47 AM   #1
fishheadback
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Default Head torque specs

Ok, first off, Its a 05STi block, with STi MLS headgaskets, and 98rs heads.

I heard that you should go by the torque specs according to what gasket you use. With that being said, I still cant find crap on this.

Anyone know where I can find these specs or know what they are?
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Old 08-07-2007, 01:49 PM   #2
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IF I can find my factory service manual, I'll pm you. There is a very specific set of specs to do it right.
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Old 08-07-2007, 07:39 PM   #3
fishheadback
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Quote:
Originally Posted by Acostafan View Post
IF I can find my factory service manual, I'll pm you. There is a very specific set of specs to do it right.

Thanks!
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Old 08-10-2007, 05:08 PM   #4
curly2k3
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mind sharing? I have a 2005 EJ205 WRX motor with EJ22e SOHC heads and i need specs too
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Old 08-10-2007, 09:25 PM   #5
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Trying to find my hard copy, I can't find my disc with the FSM on it.
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Old 08-10-2007, 11:50 PM   #6
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That is what I have in the WRX STI 2004 service manual. Hope it can help.

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Old 08-11-2007, 11:15 AM   #7
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While that may work, it's not the instructions for the WRX heads. They are different. I'd post them but I can't find my FSM disc or my hard copy. But I am certain they are not the same
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Old 08-13-2007, 03:40 PM   #8
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I have used that exact procedure on an ej205 and an ej257 block. Same headbolts even. As in the headbolts currently holding the heads on have been torqued 3 times. Once when the engine was assembled from the factory, once with an ej205, and once with an ej257.
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Old 08-13-2007, 03:56 PM   #9
fishheadback
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Well I happened to find the specs on it, and wow is it different.

But if thats how they want you to do it, thats how Ill do it.
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Old 08-16-2007, 08:33 PM   #10
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If and when you end up studding the motor, I went with ARP studs and torqued to 90ft-lbs. So far several thousand miles at 26psi and no problems at all.

-Mike
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Old 08-16-2007, 10:11 PM   #11
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seems they changed the sequence on tightening down the head. interesting.

**Right Click Save As**
Thanks!
Fuji
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Old 08-17-2007, 01:21 PM   #12
fishheadback
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You torqued all the bolts to 90ft-lbs?

The specs through subaru show the inner and outer being diff and they arent really "torqued". The final specs are degree's.

Is that what ARP said to do?


Quote:
Originally Posted by BoostorLose View Post
If and when you end up studding the motor, I went with ARP studs and torqued to 90ft-lbs. So far several thousand miles at 26psi and no problems at all.

-Mike
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Old 08-17-2007, 07:51 PM   #13
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arp bolts arent meant to stretch like the factory bolts, so you torque them down to an actual torque figure. instead of that mess of a torquing procedure the factory uses. you do, however, use the factory tightening sequence, IIRC.


~Josh~
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Old 08-17-2007, 09:07 PM   #14
Acostafan
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Quote:
Originally Posted by ballitch View Post
arp bolts arent meant to stretch like the factory bolts, so you torque them down to an actual torque figure. instead of that mess of a torquing procedure the factory uses. you do, however, use the factory tightening sequence, IIRC.


~Josh~
The factory bolts ARE NOT stretch bolts....many(except for me) have reused their factory bolts with zero issues.
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Old 08-18-2007, 09:36 AM   #15
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Yeah man, ARP has two separate specs for different installed greases and loc-tite. Both involve torquing the heads to one spec. I haven't had one issue and this car sees 25psi daily.

I also was fairly sure the stock bolts are a torque-to-yeild bolt, meaning they stretch. I'm not saying you can't reuse them, because I have in the hundreds of headgasket jobs I've done, all without return problems.

For me, it's added security for cheap when you already have the motor apart.

-Mike


Quote:
Originally Posted by fishheadback View Post
You torqued all the bolts to 90ft-lbs?

The specs through subaru show the inner and outer being diff and they arent really "torqued". The final specs are degree's.

Is that what ARP said to do?
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Old 08-18-2007, 09:40 AM   #16
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As far as the torque specs above go, I believe the WRX is: of course all done in the same sequence.

All bolts 22ft-lbs
All bolts 51ft-lbs
Back of 180
Back of 180 again
All bolts to 11ft-lbs
Center two bolts to 25ft-lbs
Then all bolts between 80-90 degrees.

I may be a little off, but that's what the old brain is remembering. Good luck.

-Mike

Come to think of it, I don't think this is the spec for the WRX, let me dig up the manual....
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Old 08-18-2007, 10:39 AM   #17
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Quote:
Originally Posted by BoostorLose View Post
As far as the torque specs above go, I believe the WRX is: of course all done in the same sequence.

All bolts 22ft-lbs
All bolts 51ft-lbs
Back of 180
Back of 180 again
All bolts to 11ft-lbs
Center two bolts to 25ft-lbs
Then all bolts between 80-90 degrees.

I may be a little off, but that's what the old brain is remembering. Good luck.

-Mike

Come to think of it, I don't think this is the spec for the WRX, let me dig up the manual....
That's what I was using back then, thus why I was like "they have a NEW sequence?"
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Old 03-06-2012, 12:15 PM   #18
Frankly
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Default

(8) further tighten all bolts, A and B, by 45 deg

this does mean the center TWO bolts, A and B,right!
Not all the bolts as it easily could be misunderstood as saying.

Did I read it right or am I about to wreck my motor?
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Old 03-06-2012, 12:58 PM   #19
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I thought it was tighten them as tight as you can with the biggest brearer bar you can find. When you feel it give quickly back it off a 1/2 turn and you are good?
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Old 03-06-2012, 01:16 PM   #20
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Torque down the heads according to which block your running. if your running an EJ205 short block then use those specs. If you have an STI block, like you are, use the manual that was posted a couple threads in. done. if you have ARP then do it to w/e ARP does now. If it was a built block you would torque it however you told your builder to do it for his/her torque plate while they bored/honed it. Hope this was helpful.
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Old 03-11-2012, 08:52 AM   #21
djjoel197
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Default subaru head bolt torque specs

torque specs from my subaru dealer


torque all bolts to 22ft/lbs in order 316
524

then torque all bolts to 51 ft/lbs in order 316
524
loosen all bolts 180 degrees

again loosen all bolts another 180 degrees

tighten bolts 1 and 2 too 25 ft/lbs

tighten bolts 3 4 5 6 to 11 ft/lbs

then tighten all bolts 90 degrees in order

again tighten all bolts 90 degrees in order

then place velcover on and do the other side
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Old 03-11-2012, 01:03 PM   #22
Pacobeagle
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Quote:
Originally Posted by djjoel197 View Post
torque specs from my subaru dealer


torque all bolts to 22ft/lbs in order 316
524

then torque all bolts to 51 ft/lbs in order 316
524
loosen all bolts 180 degrees

again loosen all bolts another 180 degrees

tighten bolts 1 and 2 too 25 ft/lbs

tighten bolts 3 4 5 6 to 11 ft/lbs

then tighten all bolts 90 degrees in order

again tighten all bolts 90 degrees in order

then place velcover on and do the other side
This is what my manual for my 2002 WRX says
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