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Old 02-08-2009, 06:30 PM   #1
kaos200
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Lightbulb Koken Hardened 10mm cam gear removal socket!

How many of us have been in this position. You’re removing your engine, tearing it apart to do whatever cool (or necessary) changes to it, and all that is stopping you from getting your heads off your block, is the pesky, retarded, anger-fueling cam gear bolts.

They stand in defiance to the most brutal tools. They are the devil. And therefore, they should be destroyed.

I have taken apart/assembled many Subaru engines, and always dread removing these bastards, especially if it’s the first time the stock engine has been taken apart, I swear Subaru has Godzilla tighten those damn things at the factory. The 10mm hex bolts have called for, and been the cause of multiple tool breakages, bolt removers, welding, and drilling to get them off. Sometimes, if you are lucky, you only get one out of the four that’s a pita (somehow always the last one), and if you ever get them off without issue it’s a miracle and you should go out and buy a lottery ticket. As you can see I’ve stockpiled extra cam gears and bolts just incase (these are just the extras, not counting the 2 sets on my engines!)



There was always the issue of holding the cam gears steady. 2.0 liter cams always had that handy hex on the cam that allowed you to hold it steady with a wrench, no such luck with the 2.5liters. They do have the actual tools for that, or even having an old belt, and clamping it tightly around the gears so they doesn’t move still leaves you with the task of getting the bolt out without bending/breaking a tool!


So, I assembled my tools



C-Clamp, vice grips, old timing belt, 22mm for crank, breaker bar, BIG breaker bar and super cool new 10mm hex



Wrap the old belt around the gears, and clamp down like your sanity depends on it (cus it might).



But my biggest complaint wasn’t from holding the gears steady, its from being unable to break the bolts lose with crappy tools like this little thing.



I would have shown you all the broken ones I’ve had over the years, but luckily Sears takes them back in exchange for new ones…

As you can tell, sub-par tools frustrate me, and there’s nothing worse than being frustrated when working on your car. Luckily I had ran into Marc at Ultimate Tool Co. (ultimatetoolco.com, yes I plugged it!) since I had bought their T70 torx drive for the transmission drains. I thought maybe he could help me from breaking any more of those cruddy 10mm’s I had been using before.

He delivered…. THIS





Its a "Koken" 10mm hardened steel 1/2" drive


So simple, no? Don’t let looks fool you. My curiosity got the best of me, and I quickly walked up to a block (which was being prepped to be removed from the car), took the timing belt covers off, rotated the crank till the pistons were down (just incase!) stuck the shifter in 6th, and cracked each bolt loose with one hand on a small breaker bar and the new tool. No snapped hex!


I called shenanigans, walked over to another block being disassembled (on a stand this time) strapped the cams down with my old timing belt that I keep around solely for this purpose, and proceeded to crack each one loose again! One needed some more push, but she gave in after some fighting. No crazy air tools, no 6foot long jack handle over your 2 foot long breaker bar with you hanging off the end like a monkey whilst the bolt stands in defiance as you break the 10mm bit!



I didn’t realize what a difference having just a nice 10mm would make, but it really is so much nicer to deal with. If it wasn’t I wouldn’t be so happy to write about it!

I’m ordering another, to plan against going crazy just incase I lose mine.



oh yah, another shameless plug, since I'm so glad they sourced this for me!

http://ultimatetoolco.com/Koken10mm.aspx
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Last edited by kaos200; 02-13-2009 at 04:45 AM.
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Old 02-08-2009, 06:55 PM   #2
Rodwrx23
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[/quote]No crazy air tools, no 6foot long jack handle over your 2 foot long breaker bar with you hanging off the end like a monkey whilst the bolt stands in defiance as you break the 10mm bit!
[/quote]

I literally almost pissed my pants. I had a complete visual of this and laughed my ass off. Nice find.
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Old 02-10-2009, 12:00 PM   #3
2gnt2wrx
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When we did mine, we just used a 10mm allen wrench with a 2ft cheaterbar. It worked like a charm. And yes Godzilla does work at the subaru factory, I think he was the designer of the GBOD also...
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Old 02-10-2009, 01:04 PM   #4
kaos200
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Quote:
Originally Posted by 2gnt2wrx View Post
When we did mine, we just used a 10mm allen wrench with a 2ft cheaterbar. It worked like a charm. And yes Godzilla does work at the subaru factory, I think he was the designer of the GBOD also...
Hah probably.
I've tried all sorts of allens, if it didnt snap, it rounded, if it didn't round, it twisted... Just pathetic. I just don't know why no one offered anything like this (that I could find) for so long.
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Old 02-11-2009, 10:26 PM   #5
Ej2.6
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i just bought this thing too, only my block is on the ground not in the engine. GOD i was so happy to think i was takin off the head today and instant WALL ruined my rebuild spree.... i hope this thing works.
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Old 03-06-2009, 01:17 AM   #6
ULTIMATETOOLCO
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Quote:
Originally Posted by kaos200 View Post
Hah probably.
I've tried all sorts of allens, if it didnt snap, it rounded, if it didn't round, it twisted... Just pathetic. I just don't know why no one offered anything like this (that I could find) for so long.
Thanks again!
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Old 03-07-2009, 03:28 PM   #7
kaos200
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Quote:
Originally Posted by ULTIMATETOOLCO View Post
Thanks again!
nooo thank YOU!
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Old 03-11-2009, 11:57 PM   #8
supernick77
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and again. it was on there so tight i thought it was reverse thread. DAMN! that was on there. i tried alot of different ways and then gave up and just jumped on nasioc. god bless nasioc
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Old 04-12-2009, 01:24 PM   #9
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Bump!
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Old 04-28-2009, 06:53 AM   #10
Dan Cech
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Thanks for the heads-up, I was getting nowhere with the autozone-brand 10mm 3/8 drive!

Ordered up a Koken and hopefully I'll be able to get those damn bolts off without resorting to violence.
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Old 04-28-2009, 09:06 AM   #11
sszyma
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McMaster also has them :

55105A63
1/2" Square Drive Hex Bit Impact Socket
10mm, 3-1/4" Overall Length, Black Finish
In stock at $12.06 Each
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Old 05-02-2009, 06:03 PM   #12
gregnice123
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Quote:
Originally Posted by sszyma View Post
McMaster also has them :

55105A63
1/2" Square Drive Hex Bit Impact Socket
10mm, 3-1/4" Overall Length, Black Finish
In stock at $12.06 Each
But when you're staring at that unecessarily long McMaster hex bit section twisted and sheared off, the difference in price for a quality socket is more than well worth it. There's a reason that the Koken unit is stubby.
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Old 05-03-2009, 06:03 PM   #13
kaos200
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Quote:
Originally Posted by gregnice123 View Post
But when you're staring at that unecessarily long McMaster hex bit section twisted and sheared off, the difference in price for a quality socket is more than well worth it. There's a reason that the Koken unit is stubby.
Agreed, one of the only times shorter/stubby is actually better.
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Old 05-04-2009, 07:08 AM   #14
Dan Cech
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Threw the Koken on a 30" breaker bar and used the old belt to lock the cams in place...made the job almost too easy

I put the belt around each cam gear in turn, a little different from the pic above:


Last edited by Dan Cech; 05-04-2009 at 07:16 AM.
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Old 05-06-2009, 06:42 PM   #15
06rexwagon
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Just ordered one.
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Old 05-06-2009, 08:33 PM   #16
fl4tsc
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ordered one sunday night, left cali monday through USPS.... too bad i'm in south carolina. hopefully it gets here before this weekend so i can finally take the motor apart
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Old 05-09-2009, 02:08 AM   #17
lennybootzz
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Can i re use my pulley and crank bolt?
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Old 05-30-2009, 08:39 AM   #18
06rexwagon
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I've removed several pulleys with mixed luck without this tool. On my motor last summer I twisted off 2 3/8 to 1/2 adapters, stripped 2 allens, and broke one bolt. It took me 2 days to get the pulleys off. I just did an 04 STi yesterday that had never been apart and I used this which I ordered about a month ago. It took me all of 3 minutes to get all 4 pulleys off. This has to be the best time saving tool you can have if you work on your own motor.
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Old 08-15-2009, 01:38 PM   #19
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Quote:
Originally Posted by 06rexwagon View Post
I've removed several pulleys with mixed luck without this tool. On my motor last summer I twisted off 2 3/8 to 1/2 adapters, stripped 2 allens, and broke one bolt. It took me 2 days to get the pulleys off. I just did an 04 STi yesterday that had never been apart and I used this which I ordered about a month ago. It took me all of 3 minutes to get all 4 pulleys off. This has to be the best time saving tool you can have if you work on your own motor.

Thank you!

We just received our shipment of these. Back in stock and ready to ship!
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Old 09-07-2009, 12:52 PM   #20
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To the top!
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Old 09-07-2009, 02:07 PM   #21
Evil Imports
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i bought a full set from Harbor Freight for like $7.99 and have taken off all the gears on 2 different motors with no problem at all, Can't see a reason on spending $28 on this
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Old 08-02-2010, 12:00 AM   #22
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Thanks for supporting a NASIOC vendor! To the top!
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