Ferrari 308 cam belt drive pulley removal

That's not a stock drive sprocket nor center nut (but that shouldn't make any difference). Remove large center nut, remove sprocket (using small puller carefully, if necessary).

 

Well, can agree that that's a "project"...(but same response: remove harmonic damper, remove center ring nuts, remove cam drive sprockets)

 

Don't follow you here -- the "pulley" and the "sprocket" are the same thing ("pulley" is more often used for rotating belt components without teeth; "sprockets" are rotating belt component with teeth). Are you supporting (i.e. pulling) the "pulley/sprocket" at its rear surface, and pressing on the end of the shaft? Do you have the whole front cover assembly removed from the engine block?

 

We're not communicating very well. What year 308? Do you have a copy of the Mondial 8/QV WSM? If not, see Fig 27 page B37 here:

https://www.dropbox.com/s/z99soo68ny9n2qa/Mondial8qv_workshop_281-83.pdf?dl=0

If you have the whole front timing assembly off of the engine block, and are pushing on the end of the shaft while supporting the front timing cover casting = not so good as this will put a lot of force on the snap ring behind the outer ball bearing and may damage the snap ring groove in the casting.

If you are trying to remove the cam drive pulley from the shaft with the front timing cover still in place on the engine = you must support (i.e., pull) the backside of the cam drive pulley when pressing on the end of the shaft.

Please be more specific about what you you are trying to do rather than posting pictures of the individual parts.

 

I wouldn’t do that, I would just use a puller to pull the sprocket away or off the shaft instead of pushing the shaft down away from the sprocket.

 

The woodruff key will prevent the shaft from moving thru the lower pulley as it binds to the bearing behind it and is of course held captive in the pulley. So your setup with the press is a no-go.

You'll need a puller like the one you posted. If it's held fast.. then apply heat to the pulley via a torch and maybe some penetrating oil or candle wax.

 

Lots can be learned from the parts diagram. Then you can see what needs to be removed.

 

As SMG said, it can't be done that way (I forgot about the woodruff key not being able to pass thru the ID of the outer bearing). You'll have to "pull" the cam drive pulley off the shaft.

 

Hi, I also had trouble getting them off. I tried the one you have in the photo, and it was not strong enough to budge them. I the used a puller that I made by welding together some steel bars and pieces from a beefier puller that I have. Some heating was also applied, but not too much to avoid damaging the parts.

Good luck, and be patient!

PS, I thought that you were much more along in the rebuild judging from the photos in your rebuild thread.

 

Use soda blasting to save having to remove all the plugs to clear out the media. You’ll have to drill out some plugs. I vapour blasted some heads this year— they looked great but the extra time to remove plugs, clean lots, new plugs was a pain.

 

I’d do it the other way round. The pulleys have no internal oil or coolant passages so blast them with anything. Use soda for the block and heads. Vapour blasting has abrasive media that will reach every crack, crevice, and passage.

 

If your lower pulleys are pitted you could ask on here for a good used pair as I’ve sold a few of those round-tooth sets in the top photo so some may have their old ones sitting in a box.