hey...replacing my timing chain set on my 86 bird 305 tpi
with a crank double roller with multiple keyways...
question...how do i get the old sprocket off
(i'm a beginner)

 

crane...double roller

 

You need to use a gear puller. Make sure you protect the crank snout threads with a suitable drift or plate.

 

ok...i've got a gear puller....so how do i get the new one back on?

 

they call it a hammer... Use either a brass drift, or a wood block and a hammer.

 

They make installation tools as well.

The Autozone ones are crappy, but they tend to work out ok. Open it before u leave and make sure it is functional however :-) U get your money back when u take it back.

If its a stubborn one, u can warm the gear up and it will expand a litle making it easier to seat.

later
Jeremy

 

Just get a 5-6" length of 7/16-20 threaded rod, and a couple of 7/16-20 nuts and some washers. You'll need them to install the harmonic balancer too, so just do it. You'll need at least two nuts so you can jamb them together to install/remove the threaded rod from the crank snout.

I use a 30mm deep socket as a drift to push the crank timing sprockets on, and a heavy washer to push the balancer hub in place. As suggested, heating the sprocket to about 400° can often allow it to be simply pushed in place by hand - but be quick, since the sprocket will start to shrink quickly as soon as it contacts the crank snout. Of course, you'll need to use gloves to handle the hot sprocket. (Sounds a little like a convenience food, doesn't it? "Hot Sprockets...")

 

I love all these high tech "install" tools. I just watched one go on a KB old block, big cheifs and the works(around $100,000 in BARE parts) and it went on w/ a regular old BFH...