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02-27-2011, 02:53 AM | #1 |
Scooby Newbie
Member#: 168000
Join Date: Jan 2008
Vehicle:1999 legacy sus black, 30th anniversary |
Head bolt replacement?
Do head bolts need to be replaced on a 99 legacy sus 2.5 when replacing the head gaskets?
Anyone have the torque spec and procedure for the heads and camshafts. This one has dual overhead cams.
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02-27-2011, 06:13 AM | #2 |
Scooby Specialist
Member#: 28685
Join Date: Nov 2002
Location: Reno, Nevada
Vehicle:2004 FXT 4EAT very STi'd |
No, they do not need to be replaced. Some googling will turn up the torque sequence.
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03-02-2011, 06:39 PM | #3 |
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Member#: 238379
Join Date: Feb 2010
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Location: Maynard, MA.
Vehicle:2000 Outback Sport Two-Toned Silver/Brown |
They do not need to be replaced, however, it is never a bad idea to.
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03-03-2011, 02:01 AM | #4 |
Scooby Guru
Member#: 71092
Join Date: Sep 2004
Chapter/Region:
MWSOC
Location: Licking County, Ohio
Vehicle:2005 2.5RS Wagon Regal Blue Pearl |
There's substantial confusion about wither or not they need to be replaced and it took a long time for me to sort out the truth on it.
The fact that they specify a "torque plus angle" leads a lot of people to conclude that they're "torque to yield" bolts and therefore need replaced every time. On the other hand, the factory service manual doesn't say anything about replacing them each time. Turns out, they are torque to yield bolts, but they're not *THAT* kind of TTY bolt. Traditional TTY bolts are torqued until they stretch (yield) into their plastic deformation range. In other words, you stretch them and they don't quite rebound to normal. This is why you can't re-use this kind of bolt. It's becoming increasingly common on modern engines to get TTY bolts that are stretched into their elastic deformation range, meaning that you stretch them and they go back to normal when you release them. You can re-use these kind of bolts many times. |
03-03-2011, 02:15 PM | #5 |
Scooby Specialist
Member#: 179478
Join Date: May 2008
Chapter/Region:
MWSOC
Location: Cleveland<OH>
Vehicle:2000 Impreza 2.5 RS Sedona Red Pearl |
All I know is I went to a Subaru dealer to buy new head bolts, and the parts counter- person informed me that they would have to order them, it would take a few days. They also informed me that they don't stock them because when the techs do head gasket jobs, they simply re-use them.
I re-used mine. I didn't have a few days to wait. |
03-03-2011, 02:41 PM | #6 |
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Location: Montana
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I've re-used mine twice now. stupid phase 1 2.5l
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03-03-2011, 04:53 PM | #7 |
Scooby Specialist
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Join Date: Dec 2010
Chapter/Region:
Tri-State
Location: Pennsylvania
Vehicle:2004 WRX PSM |
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03-03-2011, 05:07 PM | #8 |
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Vehicle:2010 FXT OBP |
^ i don't think that caused your engine failure twice in a row.
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03-03-2011, 05:57 PM | #9 | ||
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Quote:
Quote:
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03-03-2011, 06:03 PM | #10 |
Scooby Specialist
Member#: 28685
Join Date: Nov 2002
Location: Reno, Nevada
Vehicle:2004 FXT 4EAT very STi'd |
Read jamal's post. Your gasktes failed because of the combination of cheap ebay gaskets and the shadetree "surfacing" of the mating surfaces. Until you get the block and heads resurfaced professionally, you're going to be repeating this job.
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03-03-2011, 06:19 PM | #11 | |
Scooby Guru
Member#: 71092
Join Date: Sep 2004
Chapter/Region:
MWSOC
Location: Licking County, Ohio
Vehicle:2005 2.5RS Wagon Regal Blue Pearl |
Quote:
Seriously, though, your bolts weren't the problem, your technique and choice of gaskets were the problem. |
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03-05-2011, 12:05 AM | #12 |
Scooby Newbie
Member#: 556
Join Date: Nov 1999
Location: Rock Hill, SC
Vehicle:1999 BG9 Outback Silver |
They don't have to be replaced, but I used ARP head studs when I replaced the head gaskets on my 99 Outback.
Jake |
03-05-2011, 08:27 AM | #13 | |
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Quote:
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03-05-2011, 12:51 PM | #14 |
Scooby Specialist
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Now tell me why the **** you think you think it's hilarious and laugh at someone who is trying to learn where they went wrong in doing a project such as that and take the learning experience to prevent it from happening 3,4,5,6+ more times. If you were serious about your choice of car and had care about any thing besides your ego you would have looked at this and admired the fact that I was willing to put myself up on the line for answers despite MY pride and ego. You claim i'm a dumb ass, No, I simply didn't know to not use a scotch brite disk, I simply didn't know that a little bit of oil could cause failure like that. Your "typical, overly used" comment is worth a penny. Flame away **** sucker ...just flame away.
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03-05-2011, 02:35 PM | #15 |
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/me just laughs his ass off
Dude, start paying attention to the username on the first post of about 1/3 of the HOWTO or testing results posted around here. |
03-05-2011, 03:10 PM | #16 |
Scooby Specialist
Member#: 266930
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03-05-2011, 03:12 PM | #17 |
Scooby Guru
Member#: 71092
Join Date: Sep 2004
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MWSOC
Location: Licking County, Ohio
Vehicle:2005 2.5RS Wagon Regal Blue Pearl |
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03-05-2011, 03:17 PM | #18 |
Scooby Specialist
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Join Date: Dec 2010
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Vehicle:2004 WRX PSM |
To the op of this thread, I apologize for taking this over and bringing this bitch chat into it.
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03-05-2011, 03:28 PM | #19 |
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Join Date: Jul 2007
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BAIC
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Vehicle:1996 Turbo Outback 9psi on 91 No EM |
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03-05-2011, 03:36 PM | #20 | |
Scooby Specialist
Member#: 154586
Join Date: Jul 2007
Chapter/Region:
BAIC
Location: San Ramon
Vehicle:1996 Turbo Outback 9psi on 91 No EM |
Quote:
I am all for DIY and learning as you go. I was a member of this forum for a couple of years before I made my first post....simply because I didn't have anything useful to add. Don't take offense to what people say on the forum...they usually don't mean it to be offensive. Sarcasm is hard to hear when reading. OP - I just did a headgasket job and re-used the bolts. 3 days later it is still fine. Will it hold? I think so. |
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03-05-2011, 04:39 PM | #21 | |
Scooby Specialist
Member#: 28685
Join Date: Nov 2002
Location: Reno, Nevada
Vehicle:2004 FXT 4EAT very STi'd |
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03-05-2011, 07:46 PM | #22 | |
Scooby Specialist
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Join Date: Dec 2010
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Location: Pennsylvania
Vehicle:2004 WRX PSM |
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03-05-2011, 08:20 PM | #23 | |
Scooby Newbie
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03-05-2011, 10:01 PM | #24 | |
Scooby Specialist
Member#: 179478
Join Date: May 2008
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Vehicle:2000 Impreza 2.5 RS Sedona Red Pearl |
Quote:
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03-05-2011, 10:27 PM | #25 |
Scooby Specialist
Member#: 266930
Join Date: Dec 2010
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Vehicle:2004 WRX PSM |
uhhh...cool story bro? It is what it is man. Welcome to nasioc. There is nothing or no one serious on this forum, or even any other forum for that matter. Though i do hear subaruforester is a pretty sweet forum. **** happens man...and well..**** just happend. lol? As mentioned once, ya just cant seem to find sarcasm through type. smthn like that. Laugh a little would ya
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