Sprocket stuck on cam

[JohnJL]

Hi Guys,

I've got a problem I've not run into before. The sprocket is stuck on the left side cam. I've trued gently prying but I dont want to damage the chain cover or the sprocket. I've tried freeze spray, and tried turning the engine over a few times while attempting to hold the cam still.

Is there a trick to getting a stuck cam strocket off the cam?

Thanks!

[boyt911sc]

John,

Have you tried heating the sprocket? Penetrating oil and heat cycle would help. If it is really tight and stubborn, I would use a two or three-arm gear puller. But do not force it. With the puller installed, use heat and penetrating oil in conjunction with light tapping force applied on the sprocket face. Keep us posted.

Tony

[E Sully]

Make sure the key, shown by arrow, is sitting properly and not preventing the sprocket from sliding off.

[JohnJL]

Thanks guys.


Ed, I mean the chain sprocket itself, before getting to the step you show above. Though I have forgotten that step before.

[tom1394racing]

I've run into this one before. Tough to grip it especially with the chain on the sprocket.

I have found that gently prying and wiggling it from side to side, usually will free it up. You may need to tap it back onto the cam a little until it will wiggle especially if you have it jammed up. Make sure you remove the timing pin before removal.

[KTL]

If you have a small two jaw gear puller, that'll get it off. You can insert the end bolt (if it's a bolt-end cam) as a bearing surface for the jacking screw. You're not putting a lot of force on either the sprocket, or the bolt, so its not a big deal to pull with the puller. Since the confines are rather tight, you're really just holding the puller in place to get a half decent grip on the sprocket. Light turning of the jack screw is all that's needed to pull it off.