Welcome to the North American Subaru Impreza Owners Club Wednesday December 17, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Built Motor Discussion

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 08-19-2010, 04:10 AM   #1
jesterjames
Scooby Newbie
 
Member#: 252663
Join Date: Jul 2010
Chapter/Region: NWIC
Location: Bellingham, WA
Vehicle:
2002 WRX
Silver

Default Cam Sprocket Removal FAQ

I had to take my cam sprocket gears off the hard way and took video of me doing it. It took me 5 minutes each to drill them out until the heads fell off.
It took me longer to strip them in the first place haha

Things you'll need:
1. 7/16 HSS Drill (DO NOT USE CARBIDE!!!!)
2. Drill motor
3. Cutting fluid, engine oil, or w/e to lubricate the drill
4. You will need a bench grinder as its almost guaranteed that you will chip the flutes of the drill entering the hex. You must also know how to sharpen a drill using a bench grinder too i suppose.
5. Rags to keep the chips out of things.

Alright well pics will come later as my camera is dead right now.
Assuming you havent done so yet your going to want to remove the timing belt. And oil pan.
Anyway aligning the timing marks and pulling the timing belt off (Theres reasoning for this so just do it). The cams on the Left head (2&4) will spin as soon as you do this, IMPORTANT NOTE!!! DONT TURN BOTH CAMS AT ONCE, ADDITIONALLY ONE CAM SHOULD TURN BACK AND FOURTH FREELY (EXHAUST IRC). ITS THE INTAKE SIDE THATS ENGAGED. now by hand rotate the cams so that no valves are open. (when you can turn it freely back and forth a little the valves are closed). Do this on both sides of the motor, although the right head is already in this state irc.
Once this is done you now know that the pistons wont hit the valves.
Looking through the bottom of the motor rotate it so that the neither 2&4 pistons are at TDC.

Its now safe to drill on the bolts.

Explanation for removing the timing belt:
1: if the drill grabs the cam will spin hopefully preventing the drill from breaking.

2: The timing belt is putting tension on the pulleys and it will cause the pulleys to shoot off as soon as the head of the bolt pops off.

Videos and pics to come tomorrow
* Registered users of the site do not see these ads.
jesterjames is offline   Reply With Quote
Old 08-19-2010, 12:54 PM   #2
sidewayz
Scooby Specialist
 
Member#: 5810
Join Date: Apr 2001
Chapter/Region: Tri-State
Location: Easton PA
Vehicle:
2001 S366 2.5RS

Default

why bother drilling those out?? complete waste of time..

if the allen strips, then just use one of these.. pulls them out EVERYTIME
sidewayz is offline   Reply With Quote
Old 08-19-2010, 07:00 PM   #3
flstffxe
Scooby Specialist
 
Member#: 155358
Join Date: Jul 2007
Location: Coon Rapids, MN
Vehicle:
2008 Forester
Steel Silver

Default

^^ those or these, are my too favorites.


flstffxe is offline   Reply With Quote
Old 08-19-2010, 10:50 PM   #4
jesterjames
Scooby Newbie
 
Member#: 252663
Join Date: Jul 2010
Chapter/Region: NWIC
Location: Bellingham, WA
Vehicle:
2002 WRX
Silver

Default

Quote:
Originally Posted by sidewayz View Post
why bother drilling those out?? complete waste of time..

if the allen strips, then just use one of these.. pulls them out EVERYTIME
Quote:
Originally Posted by flstffxe View Post
^^ those or these, are my too favorites.


Most of the time the bolt is under to much tension to be removed that way. And if you do break one of those off its just gonna be that much harder to drill.
Whatever works for you though, personally drilling it was so easy that its the way i will do them from now on
jesterjames is offline   Reply With Quote
Old 10-02-2010, 04:46 PM   #5
tomtom84
Scooby Specialist
 
Member#: 167794
Join Date: Dec 2007
Location: o-k-l-a-h-o-m-a
Vehicle:
06 wrx wagon 6spd
'91-meotter -h6 swap?

Default

in for pics of the drilling.
tomtom84 is offline   Reply With Quote
Old 10-02-2010, 06:38 PM   #6
holyjoetart
Scooby Newbie
 
Member#: 232986
Join Date: Dec 2009
Location: Rock Springs, WY
Vehicle:
07 Legacy GT
OBP

Default

I wouldn't use those small easy-outs. They're pretty easy to break. When they break you can't drill them out.
holyjoetart is offline   Reply With Quote
Old 10-02-2010, 07:41 PM   #7
john 1badSTI
Scooby Specialist
 
Member#: 77470
Join Date: Dec 2004
Chapter/Region: MWSOC
Location: grove city ohio
Vehicle:
04 sti 10.51@138.5
on e85@ 30psi--spinning

Default

Or You Could Get The Proper Cam GEAR Removal Tools From Spx/kentmoore Tools.
john 1badSTI is offline   Reply With Quote
Old 10-02-2010, 09:45 PM   #8
quazimoto
Scooby Guru
 
Member#: 70395
Join Date: Sep 2004
Chapter/Region: MAIC
Location: Da-boonies,Va
Default

Old timing belt and two vice grip pliers. Done in 15 minutes with no broken bolts..........
quazimoto is offline   Reply With Quote
Old 10-02-2010, 09:55 PM   #9
Precision Tuning
Former Vendor
 
Member#: 38696
Join Date: Jun 2003
Chapter/Region: Tri-State
Location: Lakewood, NJ
Vehicle:
2002 WRX
White

Default

Quote:
Originally Posted by john 1badSTI View Post
Or You Could Get The Proper Cam GEAR Removal Tools From Spx/kentmoore Tools.

They really are not the best. Our $300+ dollar avcs cam gear tool lasted a month then the teeth started rounding off. Some bolts are just monsters, and others come right out. Sometimes you have to use every method listed to get them out.

Rich
Precision Tuning is offline   Reply With Quote
Old 10-02-2010, 10:23 PM   #10
john 1badSTI
Scooby Specialist
 
Member#: 77470
Join Date: Dec 2004
Chapter/Region: MWSOC
Location: grove city ohio
Vehicle:
04 sti 10.51@138.5
on e85@ 30psi--spinning

Default

I did figure out over the years that if you put the 10mm allen bit socket in the bolt and crack it a couple times with a hammer it sort of shocks the loctite due to the vibrations and makes the bolts come out easier.I have one of the earlier set of avcs int tools and exhaust tools from spx,and I did hear from the guys at the dealer saying the newer tools were not made as well as the earlier ones,I have yet to have a problem getting the bolts loose,I'm just lucky I guess.
john 1badSTI is offline   Reply With Quote
Old 10-02-2010, 11:56 PM   #11
sidewayz
Scooby Specialist
 
Member#: 5810
Join Date: Apr 2001
Chapter/Region: Tri-State
Location: Easton PA
Vehicle:
2001 S366 2.5RS

Default

We use snap ons "turbo socket". It's made for rounded nuts and has always gotten out every cam gear bolt
sidewayz is offline   Reply With Quote
Old 10-03-2010, 03:46 PM   #12
Vmiz
Scooby Newbie
 
Member#: 115744
Join Date: May 2006
Chapter/Region: MAIC
Location: Chesapeake,VA
Default

and one other way i have found is to use a hole saw without the pilot drill
believe it is a 3/4 size it fits perfect it cuts the washer off and releases the clamping pressure the the bolt comes right out no issues at all

just be careful to drill it square as not to cut into the cam gear,but works great
Vmiz is offline   Reply With Quote
Old 10-31-2010, 09:12 PM   #13
WRX_FTW
Scooby Specialist
 
Member#: 240792
Join Date: Mar 2010
Chapter/Region: South East
Location: Burlington, NC
Vehicle:
04 STi RIP, 04 FXT
Stg 3, 02 SRP WRX 37k

Default

what happened to the pics in this thread?

my old engine is out of the car.... i took the timing belt off first, then tried to remove the cams as you would any other engine..... kind of goes without saying that its not what im used to at all, and i had a lot of trouble. i am currently at a stopping point as a tried to use the hex head socket, a huge breaker bar, the old timing belt and vice grips method... and all that came out of it was broken tools and stripped bolts.

i guess that leaves me with drilling as an option. 3 of my cams spin freely until the lobes hit the valves, my drivers side intake cam is stuck in place so the valves are open. the cam lobes are on the valves closest to the radiator (dont know the cylinder #)... what do i need to do here? i tried to pull the cam caps/cams/and timing cover off at the same time from the drivers side since the 4 cam cap bolts are exposed on that side of the engine without removing the cover, but something was in a bind and it wouldnt come off all together. i dont know if the cam was putting tension on everything and keeping it from being removed or what, but i didnt want to risk breaking the cam so i put everything back how it was.

HELP!

Last edited by WRX_FTW; 10-31-2010 at 09:37 PM.
WRX_FTW is offline   Reply With Quote
Old 11-10-2010, 11:08 AM   #14
jesterjames
Scooby Newbie
 
Member#: 252663
Join Date: Jul 2010
Chapter/Region: NWIC
Location: Bellingham, WA
Vehicle:
2002 WRX
Silver

Default

Quote:
Originally Posted by john 1badSTI View Post
I did figure out over the years that if you put the 10mm allen bit socket in the bolt and crack it a couple times with a hammer it sort of shocks the loctite due to the vibrations and makes the bolts come out easier.I have one of the earlier set of avcs int tools and exhaust tools from spx,and I did hear from the guys at the dealer saying the newer tools were not made as well as the earlier ones,I have yet to have a problem getting the bolts loose,I'm just lucky I guess.
mine didnt have any lock tite on them
jesterjames is offline   Reply With Quote
Old 11-10-2010, 01:44 PM   #15
cjake39
Scooby Newbie
 
Member#: 161269
Join Date: Oct 2007
Chapter/Region: RMIC
Location: Colorado Springs, CO
Vehicle:
2007 STI Limited 247
Urban Gray

Default

This was my solution on Monday...



I was able to get two bolts out with a breaker bar and the right 10mm hex socket. The other two stripped the head out so we welded the hex socket to the bolt head that worked for one. The other one blew out the back of the socket, so a 3/4 wrench fit nicely over it....

We did have to use about a 4-5ft breaker bar. Some tools must be sacrificed for this job apparently. Heat from the welds did the most good to free it up.
cjake39 is offline   Reply With Quote
Old 11-10-2010, 03:23 PM   #16
WRX_FTW
Scooby Specialist
 
Member#: 240792
Join Date: Mar 2010
Chapter/Region: South East
Location: Burlington, NC
Vehicle:
04 STi RIP, 04 FXT
Stg 3, 02 SRP WRX 37k

Default

i split my timing belt and broke several tools..... im kind of beyond the point of trying anything that involves unscrewing the bolts.
WRX_FTW is offline   Reply With Quote
Old 11-10-2010, 04:13 PM   #17
Homemade WRX
Scooby Guru
 
Member#: 33782
Join Date: Mar 2003
Chapter/Region: MAIC
Location: 3MI Racing LLC
Vehicle:
96 bastard child
search FIRST, then PM!!!

Default

Quote:
Originally Posted by Vmiz View Post
and one other way i have found is to use a hole saw without the pilot drill
believe it is a 3/4 size it fits perfect it cuts the washer off and releases the clamping pressure the the bolt comes right out no issues at all

just be careful to drill it square as not to cut into the cam gear,but works great
that's a good one Vern. I'd never even thought or heard of someone doing that!!
Homemade WRX is offline   Reply With Quote
Old 11-10-2010, 08:50 PM   #18
340Duster
Scooby Specialist
 
Member#: 52314
Join Date: Jan 2004
Chapter/Region: South East
Location: Following the green weenie
Vehicle:
2002 PSM WRX 16G-XT
'13 500 Abarth

Default

You mean you're not returning that wrench to Sears for a replacement?

Quote:
Originally Posted by cjake39 View Post
This was my solution on Monday...



I was able to get two bolts out with a breaker bar and the right 10mm hex socket. The other two stripped the head out so we welded the hex socket to the bolt head that worked for one. The other one blew out the back of the socket, so a 3/4 wrench fit nicely over it....

We did have to use about a 4-5ft breaker bar. Some tools must be sacrificed for this job apparently. Heat from the welds did the most good to free it up.
340Duster is offline   Reply With Quote
Old 11-10-2010, 09:51 PM   #19
jesterjames
Scooby Newbie
 
Member#: 252663
Join Date: Jul 2010
Chapter/Region: NWIC
Location: Bellingham, WA
Vehicle:
2002 WRX
Silver

Default

Quote:
Originally Posted by cjake39 View Post
This was my solution on Monday...



I was able to get two bolts out with a breaker bar and the right 10mm hex socket. The other two stripped the head out so we welded the hex socket to the bolt head that worked for one. The other one blew out the back of the socket, so a 3/4 wrench fit nicely over it....

We did have to use about a 4-5ft breaker bar. Some tools must be sacrificed for this job apparently. Heat from the welds did the most good to free it up.
HAHAHA, ill stick to drilling them.
I got vids i can upload but i should mention i was a little intoxicated when i made them. Not to mention i had just finished a 14 hour day at work. LOL
jesterjames is offline   Reply With Quote
Old 11-11-2010, 01:36 AM   #20
binjoau
Scooby Specialist
 
Member#: 259948
Join Date: Oct 2010
Chapter/Region: W. Canada
Location: Regina, Canada
Vehicle:
MPS 510 whp GTX35R
Long Rod Motor

Default

I went to my local subaru dealership, asked nicely and they let me borrow the factory tools.
binjoau is offline   Reply With Quote
Old 11-11-2010, 01:46 AM   #21
Jessekrs123
Scooby Specialist
 
Member#: 236927
Join Date: Jan 2010
Chapter/Region: NESIC
Location: Oakville CT
Vehicle:
1993 Legacy Sedan
1984 BRAT

Default

Quote:
Originally Posted by quazimoto View Post
Old timing belt and two vice grip pliers. Done in 15 minutes with no broken bolts..........
This is how I got mine off.
Jessekrs123 is offline   Reply With Quote
Old 11-11-2010, 12:58 PM   #22
cjake39
Scooby Newbie
 
Member#: 161269
Join Date: Oct 2007
Chapter/Region: RMIC
Location: Colorado Springs, CO
Vehicle:
2007 STI Limited 247
Urban Gray

Default

Quote:
Originally Posted by 340Duster View Post
You mean you're not returning that wrench to Sears for a replacement?
I thought about taking it in as joke. I'll video if I do...
cjake39 is offline   Reply With Quote
Old 11-11-2010, 01:04 PM   #23
lavid2002
Scooby Specialist
 
Member#: 226864
Join Date: Oct 2009
Location: southern NJ
Vehicle:
2005 PSM WRX
18.5lb. 93 oct, DP, UP

Default

lavid2002 is offline   Reply With Quote
Old 11-11-2010, 05:49 PM   #24
cha86
Scooby Specialist
 
Member#: 111048
Join Date: Mar 2006
Chapter/Region: MWSOC
Location: AA, Mi
Vehicle:
I <3 debt
word rally suck.

Default

breaker bar + old timing belt + vice grips + 3 people = works everytime. granted the "having people" handy part is an issue but it takes 5 minutes and hasnt failed me yet. but man have i broken so much crap on these things!! AHHHHHHHHHHH
cha86 is offline   Reply With Quote
Old 11-11-2010, 06:03 PM   #25
340Duster
Scooby Specialist
 
Member#: 52314
Join Date: Jan 2004
Chapter/Region: South East
Location: Following the green weenie
Vehicle:
2002 PSM WRX 16G-XT
'13 500 Abarth

Default

All of that is great until the socket, alan key, or cam bolt strips/ breaks. an impact gun and 100psi will get most out. Then it broke all three on one cam. Drilling it took only a few minutes.
340Duster is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
cam sprocket removal investigation Gator GT Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 1 03-13-2006 12:29 AM
cam sprocket removal White 2.5rs Normally Aspirated with bolt-on Forced Induction Powertrain 6 01-03-2005 03:58 AM
Removing cam sprocket ilmaestro Normally Aspirated Powertrain 5 02-22-2004 08:35 PM
Cam sprockets hard to remove? dwx Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 8 10-15-2003 02:41 PM
cam sprocket removal help 9 Service & Maintenance 2 02-21-2002 01:01 AM


All times are GMT -4. The time now is 12:15 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.