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Old 04-29-2008, 09:41 PM   #1
brian3676
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Default Re used head bolts... caused head gasket to blow again?

Well i called the guy who helped my do the head gaskets the first time when they blew on my 00 2.5rs. turns out he reused the head bolts. i thought on subaru's u are supposed to use new ones? he works at a dealership and says they dont use new ones at the dealership eather, but now i have about 8,000 miles on the motor since the new HG were put on the there leaking again, this time the oil is getting into the coolent though, not the normal external blow they usually have, yes the heads were resurfaced and the block was checked and it was fine, so anyone think it could have been the head bolts that made it leak this time? its the only thing i could think of
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Old 04-29-2008, 10:14 PM   #2
decke48
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yes subarus use "streching" head bolt. and must be replaced when removed.. might be leaking because of the reused head bolts but might of been torqued wrong or out of order and actully warp the head..
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Old 04-29-2008, 10:47 PM   #3
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Internal headgasket leaks are just as common as external leaks.

I just double checked the FSM, replacing the head studs is NOT required or even recommended. I've never seen them replaced on a car in the shop either unless specifically requested (and the customer pays for the parts/labor to replace them of course).

Its more likely that they didn't follow the tightening procedure properly if anything.
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Old 04-29-2008, 11:09 PM   #4
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Yeah, on subaru's they can be reused apparently (I had to get my head around this too...coming from the ****astic Ford Essex engine). +1 on improper tightening sequence. Did you guys use a torque wrench that's properly calibrated too?
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Old 04-29-2008, 11:39 PM   #5
brian3676
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i did not do the tourquing my friend did but i am sure he did it right he is a full subaru tech and a dealership and does HG all day long, i have a few other friends who work there too and they all said he is really good and is the main person who does the HG on cars that are brought in. who knows though guess ill do it again! i work on hondas and nissans mostly i am a ASE tech but have never done a subaru though. on nissians u usually use new head bolts not always though depends on the engine and on honda they are not strech bolts so u always re use then, i have never reused a strech bolt though
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Old 04-30-2008, 12:11 AM   #6
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Hmm..it could just be a bad gasket...I dunno. By your posts it doesnt seem like there wouldve been any warping from the previous blown HG that couldve led to improper mating of the new gaskets...

At least you guys can do it yourself...not losing like $1000 everytime you have to do the HG again.
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Old 04-30-2008, 12:26 AM   #7
jamesfacts
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I always reuse those bolts... but I also have the heads decked.
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Old 04-30-2008, 02:08 AM   #8
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Quote:
Originally Posted by brian3676 View Post
i did not do the tourquing my friend did but i am sure he did it right he is a full subaru tech and a dealership and does HG all day long, i have a few other friends who work there too and they all said he is really good and is the main person who does the HG on cars that are brought in. who knows though guess ill do it again! i work on hondas and nissans mostly i am a ASE tech but have never done a subaru though. on nissians u usually use new head bolts not always though depends on the engine and on honda they are not strech bolts so u always re use then, i have never reused a strech bolt though
Like I said, they aren't bolts, they are studs. So installing new ones isnt as easy as just replacing bolts, and also not necessary.

Have you done anything to the car since the headgaskets were replaced? Run different coolant or oil or any mods, anything of that sort? If you havent done anything, i'd re-contact the dealership and ask them to re-diagnose it and if the headgaskets did indeed go bad again after the repair, ask them to at least split the cost of the repair or do something for you, since obviously headgaskets shouldn't be going bad again after 8,000 miles...
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Old 04-30-2008, 09:46 AM   #9
Matt Monson
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Originally Posted by americanyouth View Post
I always reuse those bolts... but I also have the heads decked.

Ditto. I blame either heads that were warped and not decked or a tech who didn't properly clean and prep the mating surfaces. Even the best of techs make mistakes. Saying that he does dozens of them just ups the odds that he will do one wrong. All he has to do is one wrong one for it to be you. This isn't saying that your buddy is a bad mechanic. This is saying that he's human...
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Old 04-30-2008, 10:04 AM   #10
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I've reused mine probably 6-7 times and don't currently have a head gasket leak, nor have I ever decked my heads. *shrug*
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Old 04-30-2008, 09:09 PM   #11
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Quote:
Originally Posted by 8Complex View Post
I've reused mine probably 6-7 times and don't currently have a head gasket leak, nor have I ever decked my heads. *shrug*
Why have you taken your engine apart 6-7 times?
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Old 04-30-2008, 09:16 PM   #12
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Quote:
Originally Posted by Kostamojen View Post
Why have you taken your engine apart 6-7 times?
1- Warranty replacement
2 & 3- Broke piston (turbo kit) (put it together before realizing head gaskets were on wrong, doh!)
4 - Hydrolocked (small puddle, not so small)
5 - Head gasket replacement
6 - Timing belt pulley bearing exploded
.....

Ok, so 6. And no, they didn't replacement them on either 1 or 3 according to the invoices.

Needless to say, the next time I take it apart, it will being parted out (swap coming sometime this year).
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Old 04-30-2008, 11:37 PM   #13
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the head bolts can be re-used without a problem if the correct torquing procedure is followed.
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Old 04-30-2008, 11:44 PM   #14
Kostamojen
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Quote:
Originally Posted by 8Complex View Post
1- Warranty replacement
2 & 3- Broke piston (turbo kit) (put it together before realizing head gaskets were on wrong, doh!)
4 - Hydrolocked (small puddle, not so small)
5 - Head gasket replacement
6 - Timing belt pulley bearing exploded
.....

Ok, so 6. And no, they didn't replacement them on either 1 or 3 according to the invoices.

Needless to say, the next time I take it apart, it will being parted out (swap coming sometime this year).


Sorry
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Old 05-01-2008, 07:00 AM   #15
Storm
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This is how we gain "experience" ..........


Jay Storm
Quote:
Originally Posted by 8Complex View Post
1- Warranty replacement
2 & 3- Broke piston (turbo kit) (put it together before realizing head gaskets were on wrong, doh!)
4 - Hydrolocked (small puddle, not so small)
5 - Head gasket replacement
6 - Timing belt pulley bearing exploded
.....

Ok, so 6. And no, they didn't replacement them on either 1 or 3 according to the invoices.

Needless to say, the next time I take it apart, it will being parted out (swap coming sometime this year).
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