More Ferrari 365, Vacuum pump and water pump

Maybe since the cylinder head porting in a 365 GTC/4 engine is so convoluted, Ferrari had to grind convoluted camshafts for the engine to make decent power. These camshafts do not allow the engine to make much vacuum so this slide vane vacuum pump was installed. This is a heavy duty unit especially compared to the tiny pumps that Ferrari 512 Berlinetta Boxers and Testarossa has.

For some reason, the bushing surface of the shaft was severely worn so we slightly undercut the shaft to clean it up and installed a new tight fitting bushing. All this vacuum pump does is operate the brake booster but I wonder is using the vacuum port on the back of the intake manifold and a large vacuum tank would have done the trick.

Vacuum Pump Slide Vane

Here is the water pump detail on the Ferrari 365 GTC/4 engine. The 400/412 has the same set up in this area where the water pump housing outlet is less than 1/4″ from the inlet on the timing chest. A rubber coolant hose connects the two pipes but you cannot replace it in the car! A factory trained mechanic told me that he can get a hose in between the small gap “in chassis” but I have no idea how. Problem is that you cannot remove the water pump housing in the car because of the risk of screwing up the chain tension in the lower timing chest! Goofy… yes! Since the engine is out and all apart now is a good time to replace the hose, probably a good ideal.

Ferrari water pump