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Old 07-10-2012, 09:36 PM   #1
petrakov08
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Default Sti heagaskets on N/A EJ25 torque specs?

I'm putting together a 2.5 phase II block with phase I heads, from the research I've done 04-05 Sti headgaskets can be used for higher compression. What torque specs should I use since the gaskets are thinner and I'm putting DOHC heads on a SOHC block?

Thanks
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Old 07-11-2012, 01:28 AM   #2
alt14
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I'd go with the specs from the block itself otherwise you might over tighten them
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Old 07-13-2012, 09:20 PM   #3
geronimo81
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Torque sequence/spec needs to match the heads. I hope this helps. Also need the DOHC head bolts as they are longer.
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Old 07-16-2012, 09:38 PM   #4
petrakov08
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Anyone else have an opinion? Am I matching block or head torque specs?
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Old 07-16-2012, 10:23 PM   #5
jamal
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Heads. Same sequence for all DOHC cars. You may want to double check piston to head and piston to valve clearances with the thinner HGs though. I was under the impression you have to use the thicker phase 1 gaskets.
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Old 07-17-2012, 04:22 PM   #6
petrakov08
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Gotcha, the sequence in which you tighten the head bolts is the same but what about the actual torque specs on each bolt? Does anyone have any opinion on the valve clearance? From what I've read there aren't issues with the thinner gaskets.
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Old 07-17-2012, 05:09 PM   #7
AliBenn
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my thread:

http://forums.nasioc.com/forums/show...ght=headgasket

no issues with valve clearance
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Old 07-24-2012, 10:14 PM   #8
petrakov08
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Quote:
Originally Posted by AliBenn View Post
my thread:

http://forums.nasioc.com/forums/show...ght=headgasket

no issues with valve clearance
Thank you.

Can anyone confirm the torque specs I've found?

(That's DOHC heads on a SOHC block with EJ257 Sti Gaskets)

...
Torque to 22ftlbs
Then to 51
Loosen 180*
Loosen 180*
Torque 1-2 to 25
3-6 to 11
Tighten 80-90*
Tighten 80-90*
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