GNG_Kirby Posted February 27, 2010 Share Posted February 27, 2010 So Subikid90 made a good point, to keep this for others to learn. Yes all head bolts do stretch, but apparently the head bolts on a 98 2.5GT are not actual stretch bolts, which for those of you who don't who what those are, they basically are made so the bolt stretches (duh?), and after they are removed must be replaced. Being my original question. However, replacing head bolts, especially on Subbies isn't a bad idea, whats another $75 or so. Link to comment Share on other sites More sharing options...
subikid90 Posted February 27, 2010 Share Posted February 27, 2010 When I did mine I used new head bolts just to be safe. I know that you can reuse the head bolts. There is an inspection for them in the Chilton's manual i believe. -Subikid90 1997 Legacy GT 5spd & EJ251 w/EJ25D heads ~10.5CR 1998 Legacy GT Limited waiting for EJ22T hybrid swap Link to comment Share on other sites More sharing options...
rmb2485 Posted February 27, 2010 Share Posted February 27, 2010 ALL bolts stretch when they are torqued. Really, you should never reuse any bolt (or nut), but I definitely wouldn't reuse bolts in the motor if you're taking the time to tune it up and want to end up with a reliable motor that will go another couple hundred thousand miles. Link to comment Share on other sites More sharing options...
GNG_Kirby Posted February 27, 2010 Author Share Posted February 27, 2010 Ehh I just put the old ones back in. I would have replaced them if I did internal work, but I didn't, so it's fine. Link to comment Share on other sites More sharing options...
mwiener2 Posted February 27, 2010 Share Posted February 27, 2010 If it were turbo and you were going for more than stock power.. new ones. on a DD NA, old ones are fine My Mods List (Updated 8/22/17) 2005 Outback FMT Running on Electrons Link to comment Share on other sites More sharing options...
httrdd Posted February 27, 2010 Share Posted February 27, 2010 You should replace them. What is another 50 bucks for new bolts while the heads are off. I would not want to pay for the repairs if the really streched one does not hold! Link to comment Share on other sites More sharing options...
subikid90 Posted February 28, 2010 Share Posted February 28, 2010 That's the same thing I thought when I did mine. -Subikid90 1997 Legacy GT 5spd & EJ251 w/EJ25D heads ~10.5CR 1998 Legacy GT Limited waiting for EJ22T hybrid swap Link to comment Share on other sites More sharing options...
jay-d Posted March 5, 2010 Share Posted March 5, 2010 I wish I put new head bolts in when I did mine.. gasket blew a second time! Then I just put in a JDM engine.. much easier. Link to comment Share on other sites More sharing options...
DN1911 Posted March 8, 2010 Share Posted March 8, 2010 Subaru does not require new head bolts!! used to work in a Subaru service shop and they do not have to be replaced Link to comment Share on other sites More sharing options...
Reuben Posted March 8, 2010 Share Posted March 8, 2010 Ehh I just put the old ones back in. This. I have a mate who works at a subie dealership, and he says they always re-use the bolts. Only time i'd say use new ones is if it's not the first time the engines been pulled apart, of if you were building a new engine from scratch. If it's just headgaskets, re-use. Said mate actually did build a new engine from scratch and re-used his bolts. That was a V3 STi engine, and he's making more power than me just fine on the old bolts. That said, 2Ls are far less prone to HG failure. Link to comment Share on other sites More sharing options...
VendettiveSuS Posted March 10, 2010 Share Posted March 10, 2010 $50 bucks at rockauto.com is a hell of a lot cheaper than $1500 at a dealership when you blow the heads again. Link to comment Share on other sites More sharing options...
subikid90 Posted March 11, 2010 Share Posted March 11, 2010 GNG_Kirby why do you can to close this tread? Keep it as a reference for the rest of the community. -Subikid90 1997 Legacy GT 5spd & EJ251 w/EJ25D heads ~10.5CR 1998 Legacy GT Limited waiting for EJ22T hybrid swap Link to comment Share on other sites More sharing options...
gibbons98legacygt Posted March 11, 2010 Share Posted March 11, 2010 I work at a subaru shop never replaced them no need only way they get messed up if for some reason you f up and cross thread it then u need a new bolt and block lol. Link to comment Share on other sites More sharing options...
VendettiveSuS Posted March 11, 2010 Share Posted March 11, 2010 I had my head gaskets redone at a glorious subaru shop. They reused the bolts. No problem right? No. The gaskets are going out again. So I no longer take my baby to a "subaru" shop. Link to comment Share on other sites More sharing options...
mwiener2 Posted March 11, 2010 Share Posted March 11, 2010 ^^ what are you talking about? My Mods List (Updated 8/22/17) 2005 Outback FMT Running on Electrons Link to comment Share on other sites More sharing options...
gibbons98legacygt Posted March 11, 2010 Share Posted March 11, 2010 I had my head gaskets redone at a glorious subaru shop. They reused the bolts. No problem right? No. The gaskets are going out again. So I no longer take my baby to a "subaru" shop. Sorry who ever worked on ur car is a retard and messed it up it aint the bolts fault. Link to comment Share on other sites More sharing options...
VendettiveSuS Posted March 11, 2010 Share Posted March 11, 2010 read the top post. They should have been replaced. Link to comment Share on other sites More sharing options...
clayh Posted March 13, 2010 Share Posted March 13, 2010 Cost for me for new bolts was $150CDN. I checked a few local places and they were all the same. I know I could probably get them cheaper off the net but I didn't want to wait a week for them so I reused the old ones. So far so good but its only been a week....... Link to comment Share on other sites More sharing options...
gibbons98legacygt Posted March 13, 2010 Share Posted March 13, 2010 They will be fine dont worrie about it Link to comment Share on other sites More sharing options...
mwiener2 Posted March 14, 2010 Share Posted March 14, 2010 to those that had headgasket failures and re-used old bolts, then had failures again. When the heads were off, were they ever checked to make sure they were flat? My Mods List (Updated 8/22/17) 2005 Outback FMT Running on Electrons Link to comment Share on other sites More sharing options...
PhilT Posted March 14, 2010 Share Posted March 14, 2010 ALL bolts stretch when they are torqued. Really, you should never reuse any bolt (or nut), but I definitely wouldn't reuse bolts in the motor if you're taking the time to tune it up and want to end up with a reliable motor that will go another couple hundred thousand miles. The only way I can make any sense out of this statement, is if it was made by a nut and bolt salesman. Otherwise it's plain old fashioned BS. Double Award Winning Legacy GT Wagon Link to comment Share on other sites More sharing options...
mwiener2 Posted March 15, 2010 Share Posted March 15, 2010 so I should replace my lugnuts and studs everytime I take a wheel off My Mods List (Updated 8/22/17) 2005 Outback FMT Running on Electrons Link to comment Share on other sites More sharing options...
PhilT Posted March 15, 2010 Share Posted March 15, 2010 so I should replace my lugnuts and studs everytime I take a wheel off Actually Rao has the right idea, just completely rebuild the car everytime you drive it. Double Award Winning Legacy GT Wagon Link to comment Share on other sites More sharing options...
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