Cam drive pulley seals replaced on my Ferrari 308 GT4

I pulled the forward cam belt (doing them one at a time), and went to fit my three-arm pulley to pull the cam drive pulley, but it just slid off without much effort which was nice. Then I spotted the reason for a big oil leak - the seal came out with the pulley! After 30+ years in there it was hard like plastic so must have hardly been sealing the drive shaft at all. At least then I didn't have to work out how to extract it. The key came out pretty easy too with a brass drift. With the retaining circlip removed you can pull the outer bearing with a small bearing puller tool.


Nice new seal then onto the rear drive pulley



After a test run it seems that the drive pulley leaks are no more. That's two down, several more to go...

Leak not fixed on my Ferrari 308

When I took the car out for a test run it was still leaking oil from the belts end. Not the crankshaft seal that I just replaced (see below) but the seals behind the cambelt drive pulleys. Urgh. this means the belts have to come off, and I have to do the full job of removing cam drive pulleys (with silly pin nut locknut), replace old seals and whilst I'm in there replace the cam drive pulley outer bearings. Put it all back together with new timing belts (damn - only just had these replaced in November) and I may as well put in new belt tensioner bearings - I had these lying round from an ebay purchase a few months ago - good thinking ahead me thinks.



Made a makeshift cam lock tool from two pieces of wood cut to fit the camshaft pulleys (95mm diameter) and bolted together ensures the cams won't move by accident. also the position of everything is marked up with correction fluid as a reference and the crankshaft is set at PM1-4 timing mark.

Is the leak fixed ?

Well hopefully at least one of the leaks is fixed. I replaced the belts end crankshaft seal (£8) a few days ago but I've not had chance to fire it up yet to check it. I used the screw in the seal and slide hammer method, whereby you drill a small hole through the metal part of the seal cover, screw a self-tapper into the hole, grip it and pull the seal out. I made a nylon tube tool which fitted snugly over the crankshaft to insert the new seal in squarely.