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Old 10-07-2008, 05:48 PM   #1
onemoreday21
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Default Stripped 10mm Hex Cam Gear Bolt!! HELP!!

Alright got through 3 cam gear bolts and on the last one, drivers side exhaust, hex key completely stripped out the bolt. Now I noticed in another thread someone mentioned that this is not uncommon, my question is has anyone every directly dealt with this problem and if so what solution did they use to remedy it. No rush but I definetly want to get this drivers side head off so I can see how badly the rod bearings are f**ked up lol.
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Old 10-07-2008, 05:59 PM   #2
gold rush
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Your going to have to drill it out (expect 1 hour). Once you get a large part of the material removed from the head of the bolt, the washer part recoils and you can use a punch and hammer to break it loose. Have fun.
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Old 10-07-2008, 07:01 PM   #3
Artie@Agile Auto
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I usually weld a nut or short bolt on it and then use an impact gun to remove it. Very easy to do if you have access to welding equipment. I would not drill it out, but it's just me. Good luck with the build, I hope the rest of it will be more cooperative.

-Artie
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Old 10-07-2008, 11:56 PM   #4
ballitch
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There are little "bits" called screw extractors, you can get them at Sears/ any decent auto parts store. I havent seem many that big, but you could also try left hand drill bits.

Tried a good set of vice grips?




~Josh~
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Old 10-07-2008, 11:59 PM   #5
Twiztidunreal
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i took mine to a machine shop, they used what seems like a jack hammer/drill to brake the bolt loose, the bolt was useless afterwards but it go it out
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Old 10-08-2008, 12:49 AM   #6
Mycues1982
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yea if you can have a nut welded onto it
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Old 10-08-2008, 12:54 AM   #7
69subaru360
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First try, with the timing belt still on, putting a large pair of vice grips on it and hitting the vice grips with a hammer to crack it loose. Next step is hammer and chisel, see if you can get the chisel to dig in and spin it loose. After that you are looking at cutting it off or taking the advice above ^^ and try welding a nut on.
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Old 10-08-2008, 08:49 AM   #8
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I say try to weld a nut on.
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Old 10-08-2008, 06:01 PM   #9
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I drill them all out. The ones that usually give me the most problems intake cam bolts on the cars with AVCS. I drill them out to ~21/64's and then use the impact wrench to take them out. Drilling them out allows the bolt to stretch a little bit, relieving alot of the surface tension from having a big flat washer on a flat surface.

Welding a bolt on there is anothey way to remove it, but I've never had good luck with that method.
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Old 10-09-2008, 04:07 PM   #10
EMS
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I had it once, drilled it out. Absolutely no problem, took less than 15 minutes.

Mark.
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Old 10-09-2008, 04:57 PM   #11
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cut a straight slit across the bolt head then you an impact driver with a flat head screwdriver. basically, turn the bolt into a flathead screw.
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Old 10-09-2008, 05:04 PM   #12
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I ran into this problem the first time I rebuilt the motor. I tried every kind of bolt extractor and vise grips and pliers specifically designed to remove rounded off bolts. I ended up cutting a cross in the head (including the flat washer part) of the bolt with a dremmel with a cutting disc. Then you can bend the head back to relieve the pressure on the bolt. It will be finger tight at that point.
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Old 10-10-2008, 01:21 AM   #13
charliew
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A drill that fits in the hex hole tightly and drilled only to the depth of the head of the bolt and then a little more. That only leaves a very small amount of bolt left, you can grab it with vice grips and just snap it off. The cam comes off and you screw the bolt out with your fingers. Some people just buy new bolts and do all four that way.

The worst thing in a shop is a hammer especially around bakelite cam gears.
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Old 10-10-2008, 04:28 AM   #14
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a hammer will generally get a 17mm 12pt socket on there tight enough to remove the bolt.

or, if it's not an avcs bolt, you do exactly what jbwrx described. Generally you'll need a new cam gear too.

the trick to get them off right in the first place is to wrap a timing belt around the gears and idlers so it jams them in place. Then you can get a breaker bar on there with a good allen socket and really lean on it to break them loose. It needs to be a sharp, sudden motion with a big bar and the socket well seated in the bolt. It works great. The Subaru service tools, on the other hand, are useless.

Last edited by jamal; 10-10-2008 at 04:36 AM.
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Old 10-31-2008, 02:49 PM   #15
AwdBoostCreep
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I had this happen to me I just drilled the head off and unscrewed the bolt...... Where do I get new one's ?!?!?!? Thank you.
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Old 10-31-2008, 02:54 PM   #16
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i had this happen to me..luckily somehow my dad managed to get it out, hes got a special set of hands for sure.

drilling it out seems to be the most common way to do it.

when you put the bolt back on put some oil around the head of the bolt, makes removing it easier if u mess something up. i wouldnt suggest putting it on the thread though..
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Old 10-31-2008, 03:00 PM   #17
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Quote:
Originally Posted by AwdBoostCreep View Post
I had this happen to me I just drilled the head off and unscrewed the bolt...... Where do I get new one's ?!?!?!? Thank you.
.....
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Old 10-31-2008, 03:18 PM   #18
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you get new ones from the dealership...
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Old 10-31-2008, 03:21 PM   #19
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i wouldnt advise using a hammer...i broke a camshaft using a hammer and chisel. dont heat up the bolt either (not mentioned here but others have mentioned it), youll bake the plastic cams. i would try the locking plyers first and if not then drill out. any kind of cutting of the head of the bolt will work as you wanna release the tension at the head. get new bolts from the dealership. try to get the 03 and back cam bolts as those are regular 17mm bolt heads. the most important thing when you FIRST try to get the bolts off is having good tools that wont strip out the allen heads. crappy tools will strip them, but a good 10mm hardened socket and a long breaker bar will knock them out easily.
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Old 10-31-2008, 03:27 PM   #20
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Quote:
Originally Posted by Homemade WRX View Post


you get new ones from the dealership...
Don't have a dealership in my area.
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Old 10-31-2008, 03:28 PM   #21
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subaruparts.com
they'll ship
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Old 10-31-2008, 03:39 PM   #22
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i can't seem to find it on their site...
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Old 10-31-2008, 03:44 PM   #23
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you have to email jamie @ subarugenuineparts.com

there parts diagram suck but you need to make sure they're sending you the right one.
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Old 10-31-2008, 04:13 PM   #24
Mechie3
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While you're at it, "upgrade" to the old style bolts that use a hex head (for standard sockets) and not the hex key.
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Old 10-31-2008, 04:47 PM   #25
FURYOF4
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The same thing happened to me recently and I tried everything I could think of to get the last one out. I ended up welding a nut to it which worked perfect. You just have to be careful not to get the gear too hot. I would weld a little bit at a time and use a wet rag to cool everything down in between.

What years/models came with the hex style cam bolts?
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