Advice Please On Rusty Pulley

[dogma1978]

Hi peeps

Im afraid im yet again asking for more advice. After giving my car and engine a good look over I noticed that one of the Pulleys is extremely rusty. The one in question is (looking at it from the front of the car) is the one thats closest to the driver. It also has the air con pipes passing close to it. I cant see any wires or anything attached to it but cant see all the way around it tho. It appears to be bolted to the engine and is attached to a large piece of square alloy. I have tried to work out what it is but one diagram says its the Alternator, the other says the Idle pully ? The pully doesnt seem to be making any bad noises but im just worried about the general condition of it as the rest of the engine is in nearly mint condition. I have noticed that rain water seems to be entering the engine bay via the holes where the wiper arms sit. many thanks for your advice

many thanks

Jim

[Lenny]

Your pullys will be mate of forged cast steel mate,

They will be the hardest wearing part on the car, but if conserned

You could have it or its replacement from a breakers; sand blasted and powder coated on the sides to protect from decay,

The altinator is a round or square lump with vents on it and copper can be visible through the vents,

The idle pully feeds your power steering pump and air conditioning