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Old 04-09-2008, 08:42 PM   #1
hangman
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Member#: 173493
Join Date: Mar 2008
Chapter/Region: NESIC
Location: New England
Vehicle:
1999 Legacy GT
Quick Silver

Default Camshaft Sprockets Help

Ok this project that I was planning has come down to the "camshaft sprockets" I've been reading threads after threads and wants to make sure what cam side spins. and do I hold the driver side and passenger side or just the side that's "under load" Which is the driver side correct me if I'm wrong. I promise when I get to doing this I will make a write up for members who are in the process or planning to do this. And for the tools to hold the cams what would I use I've seen this one post http://forums.nasioc.com/forums/show....php?t=1128226 #25 which Inspired me to want to do the same or just get the special tool(s). Please some suggestions please.
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Old 04-10-2008, 10:03 AM   #2
hangman
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Member#: 173493
Join Date: Mar 2008
Chapter/Region: NESIC
Location: New England
Vehicle:
1999 Legacy GT
Quick Silver

Unhappy

Come up peeps you guys telling me out of all the people that viewed this none have ever use something else rather than the service tools and more in dept of the sprockets.
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Old 04-10-2008, 11:59 PM   #3
Patrick Olsen
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Member#: 120
Join Date: Jul 1999
Chapter/Region: AKIC
Location: Where the Navy sends me...
Vehicle:
1997 Legacy 2.5GT
QuickSilver Metallic

Default

This isn't a Legacy-specific question. There's tons of information about timing belt installs in the Service & Maintenance forums. Having done my N/A DOHC and my sister's WRX DOHC I can tell you that the procedures are the same.

The driver side intake cam is really the only touchy one - it will snap off the cam lobe without even bumping it all that hard. The driver side exhaust cam will also rotate, but generally it won't be a problem. The passenger side cams are fine, no need to worry about them at all.

I didn't use any tools to hold the cam sprockets in place. I just rotated them into the correct positions and then was careful not to bump them. With that said, the driver side intake cam did jump on me a couple of times (on both cars mentioned above), but it doesn't seem to have caused any problems. When the cam rotates off the lobe, the valves are going shut, so they're not going to hit anything.

Pat Olsen
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Old 04-15-2008, 01:57 AM   #4
rexorama
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Join Date: Oct 2002
Chapter/Region: NWIC
Location: bk-industries.com
Vehicle:
03 MBP Sedan
02 PSM Wagon

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So long as you have the crank timing mark lined up so the pistons are midway on both banks even if you accidently spin the drivers side sprocket off the cam lobe it won't due any damage. It's happened to me a bunch of times over the years and no harm has ever come from it. As Pat said, it's just shutting the valves, and there's not enough force to cause the other set of valves to open and cause contact. You would only be in trouble if one of the pistons on 2 or 4 were at TDC, but they wouldn't be if the crank mark is straight up.
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