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Old 03-27-2009, 02:16 PM   #1
shadymilkman129
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Exclamation Removing Cam Pully... PLEASE help

Working on an 05 sti motor and I have come to a grinding halt. I am trying to remove the cam pullys which are held in by the 9mm hex's
(thanks subau for not sticking with the 17mm nuts that worked great before)
and they absolulety will not come out.

I have tired a 450 lb impact, A breaker power with a torque extention which was bending before the hex nut even began to turn. Are these reverse threaded or somthing? Someone please let me know any experiance you have with removing the cam pullys, TY!
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Old 03-27-2009, 02:22 PM   #2
mick_the_ginge
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They are 10mm, I use a breaker bar with a 3 foot extension to break them free. They are threaded normally
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Old 03-27-2009, 02:33 PM   #3
shadymilkman129
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Ok, I will try a 10mm 1/2 hex and let u know if it works! Thanks in advance
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Old 03-27-2009, 02:56 PM   #4
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I leave the timing belt on and use a (1/2) 18 inch breaker bar with an impact wrench hex head while jamming something in the flywheel (on the stand). Works great but sometimes I think I am going to break the bolt right off. I found that just pushing really hard works better than trying to hammer on it.
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Old 03-27-2009, 03:41 PM   #5
shadymilkman129
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WEll it turns out i was using a 10mm, however it was a 3/8 socket. Looked everywhere for a 1/2 10mm hex socket, but none of the parts stores have them. Hopefully snap on, matco, cornwell, or mac will have one when they stop by next week.... This is really anoying. Anyone out there able to get it off with a 3/8 10mm? I put a 1/2 converter on it and used a tourqe bar, but still just flex in metal, no loosing of the bolt.
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Old 03-27-2009, 03:44 PM   #6
mick_the_ginge
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I've only snapped 3/8's 10mm's they are not beefy enough to break the cam bolts free
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Old 03-27-2009, 03:46 PM   #7
shadymilkman129
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Ok ill wait for a tool truck. I just used my IR titanium 450 lb or tq and it didnt budge... Ill have to wait for the 1.2 insaid of the 3/8 with a 1/2 adapter.

Im definatley replacing these with the 17mm bolt style when I put it all back together
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Old 03-27-2009, 03:46 PM   #8
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Be thankful it has not rounded
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Old 03-27-2009, 03:52 PM   #9
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Leaving the timing belt and all the guides on with something jamming up the flywheel works.

10mm 3/8 drive will usually break. Try it with a 3/8 to 1/2" drive adapter and the adapter will usually break. 10mm 1/2" drive is the only thing that works. One was so tight I stripped the Mac Tool 10mm I was using. Just gave up drilled it out and bought a new bolt for $1.78.
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Old 03-27-2009, 05:01 PM   #10
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drill the heads off.
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Old 03-27-2009, 05:55 PM   #11
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I suppose if im replacing it with the 17mm nut style anyways i can just drill the front off the bolt..
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Old 03-27-2009, 05:58 PM   #12
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Quote:
Originally Posted by shadymilkman129 View Post
I suppose if im replacing it with the 17mm nut style anyways i can just drill the front off the bolt..


not sure if it works like that, but I stripped a bunch on mine. I just use a normal impact to remove them now.

one time I had to cut into the bolt, notching it.. stuck a pry bar in there, and welded the two together, then put a pipe wrench on the bar, and got it off immediately.

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Old 03-27-2009, 06:25 PM   #13
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Genius Tools makes a 10mm 1/2 inch drive one you can use. I've used mine many times along with a 24 inch SK breaker bar and I've gotten them off pretty successfully
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Old 03-27-2009, 08:24 PM   #14
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Do it by hand so you don't strip the hex. Just man up with a breaker bar and it will come open. I actually even used a 3/8th drive one with a 1/2 adapter.
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Old 03-31-2009, 01:03 PM   #15
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I purchased an impact half inch hex drive set and aired up my impact that puts out 350 lbs, still nothing. Tried it by hand, still nothing. Im lost and dont understand why they are not breaking free...

Funny thing is, I work on subarus ALL the time, and this is my first build and i cant even get the freakin cam pull bolts out...
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Old 03-31-2009, 01:10 PM   #16
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Have you tried using a long breaker bar (2-3ft) on the 1/2 socket?
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Old 03-31-2009, 01:14 PM   #17
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Yup tried that along with using a breaker bar to prevent belt movment and still nothing...
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Old 03-31-2009, 01:20 PM   #18
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You can get away with a 3/8th, but it will most likely snap. If not on the first, then on the second... I went through 3 3/8th craftman (not the best quality), before I got the gearwrench 10mm half inch drive.

I do not recommend impact with it though, if you can avoid it. Increased possibility of rounding out the inside. 3-4 ft cheater bar, along with a friend to make sure its "square" in the hole. Support the cam with the cam tool, on a jack stand. Works great.
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Old 03-31-2009, 01:26 PM   #19
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Quote:
Originally Posted by Fongers View Post
Do it by hand so you don't strip the hex. Just man up with a breaker bar and it will come open. I actually even used a 3/8th drive one with a 1/2 adapter.
Agreed.. The hex bolts will round out if you keep blasting it with an impact. I usually try an impact on each one with the belt on and if it doesn't immediatly come loose, I'll grab a breaker bar.. I've used our 1000ft/lb Ti impact on them and still nothing.. Breaker bar all the way! Haha.. I've even bent both of our COBB cam tools that we have.. I remember pulling on the breaker bar and hearing a creaking noise.. I thought it was coming loose, but it was the COBB tool bending.lol
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Old 03-31-2009, 02:19 PM   #20
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Quote:
Originally Posted by shadymilkman129 View Post
I purchased an impact half inch hex drive set and aired up my impact that puts out 350 lbs, still nothing. Tried it by hand, still nothing. Im lost and dont understand why they are not breaking free...

Funny thing is, I work on subarus ALL the time, and this is my first build and i cant even get the freakin cam pull bolts out...
it takes 3 minutes a piece to drill the heads off.....
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Old 03-31-2009, 04:45 PM   #21
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Just make sure you don't try to reuse ANY of the cam gears. I've seen them shatter after they've been impacted.
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Old 04-01-2009, 09:16 PM   #22
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removal of those 10mm hex bolts was by far the worst part od disassembly....broke 3 craftsman 10mm and bought a 10mm gearwrench 3/8 socket and they finally came off.....id say about 600lb.ft.
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Old 04-01-2009, 09:26 PM   #23
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Mine popped right off. I used a 10mm allen wrench stuck in the end of a four foot long jack handle. I had the motor on the engine stand and had someone hold it still. All four popped right off.

Harbor freight has 10mm half inch hex sockets. I have also used them with a 3 foot long breaker and they work fine also.

You are gonna have to man up and put some serious leverage on that bolt and hang on that sumbeotch until it breaks loose.
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Old 04-01-2009, 09:37 PM   #24
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Old 04-01-2009, 10:01 PM   #25
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I do the same thing as the link. I use the vise grips and timing belt trick works liek a charm. Now I have a motor at the shop That i can not break the cam bolts loose to save my life. I had to tig weld a nut to the allen section since it spun it came loose but screw it. I'll buy one of those allenheads and see how they work.
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