Right side camshaft housing removal question

[jess p]

Hello again everyone

I'm rebuilding what I thought was an 82 911 SC engine but just ran the engine
numbers and turns out it is a 1980. I have if facing the cam housings I have
removed the left side tower, heads and cylinders. When I'm attempting to
remove the right side cam gear ( inner) it will not budge. Does it separate
from the cam. I removed the outer gear with my P202 and 46mm crowfoot
wrench but can't get the inner one off. Any ideas?

Thanks in advance.

[Flat6pac]

There is a couple ideas
Heat the gear and see if it slides
Get the foot tools that will let you get an edge behind the gear and roll pressure against it.
Back the crank about 30 degrees from any TDC cylinder and you can turn the cam fully to work the foot pressure off.
Tap the end of the cam while applying foot pressure...something will work.
Bruce

[jess p]

Thank you Bruce

[Walt Fricke]

If the inner gear is the one the locating pin goes into to position the chain gear, that is located by a Woodruff key, so it should slide off easily. It is an unlikely area for rust, being filled with a mist of oil all the time, but obviously it is stuck.

The alternator fan is held onto its shaft in a similar manner, with a key, and it can be tricky to get off, as among other things you can't easily get a puller on anything, and tapping or pulling on fan blades is apt to break one. What I have found useful is to use the air tool which has chisel attachments (is chatter gun a common term for this?) which work like a small jack hammer. I welded a thick washer on the head of one of the tools which can be used on these devices so it had a nice flat head. While pulling with fingers outward, I apply the chatter gun tool tip against the end of the alternator threaded spindle and let it chatter some. This helps it slide out. Using some kind of tool to pry (drum brake adjuster? Pry bars with the short lever head?) in conjunction with vibration ought to get it loose.

I think this is similar to Bruce's tapping the end of the cam while applying pressure, though I guess I don't know what a foot tool is.

I had a cam seize up once, but that's not the issue here as I understand it, and I don't recall ever having trouble getting the inner gear off, especially when futzing around with chain gear parallelism and the iterative process with shims. If I didn't get the key in just right, sometimes the inner gear needed some tapping to get it fully on and seated, which will rock the key to the zero angle it needs, but this hasn't led to sticking.

[DRACO A5OG]

Post a pic. +1 did you remove the Woodruff key? I am sure you did.

[Flat6pac]

Can't remove the key until he removes the inner gear
Bruce

[DRACO A5OG]

Maybe key is jammed in some how???

[KTL]

I've had a few of the cam hub/indexing rings that were difficult to get off the cam snout. I used a small two jaw gear puller to remove it. It required no major effort to pull the ring off. I just held the two jaws behind the ring teeth with my hand and turned the puller's jack screw with my finger strength and the ring pulled right off the snout.