Are there only meant to be 2 screws on the hub ?

 

Yes only two screws per rotor. The other two holes you see are commonly used for screwing bolt to separate the disc from the hub.

 

since these photos are up, I have a question about the holes in the rotor.

So I purchased a set of winter wheels/blizzak tires and the wheels (Sport Edition A8-2) don't cover the brake rotor completely and I can see some of those holes exposed. Should I be worried about salt and water going past those holes, accumulating and corroding the drum brake assembly inside the hat of the rotor?

 

Regardless of any type of rims you use the rotors will most definitely start rusting but it won't past hole and make their way to the drum shoe. Best solution to keep your car safe from rusting is to get spray bottle and buy some diesel and spray diesel on the rust exposed areas of the car specially undercarriage. It will keep your safe from rust and you won't hear any squeaks. And each time you wash your car from under, the caked on mud will come off easily. People take their cars for expensive rust preventative coating but the best way to prevent you car from rusting is to coat it with diesel fuel. That's what we do to our cars in Pakistan, each time we wash our cars we coat the wheel wells and undercarriage with diesel.

 

Noticed that sll the wheel bolts on the left are off center and touching the hub one side. Wonder if they are all bent

 

Sometimes they sit like that until you center them with the lug nuts.

 

The upper set screw in his picture looks like it's not in all the way, hence it's not centered.

 

Just an optical illusion there. They are all the way in and both in the same depth.

 

yes there is only two per rotor, but the rotor has 10 provisioning holes for them for easy quick install.
they are only there to assist in keeping the rotor on the hub during installation of the calipers.
they are NOT the main component to keep the rotor from spinning free - the studs are!

nissan does not even have these rotor screws so when you remove the wheel, the rotor sometimes just dangles there and the caliper keeps it from completely falling off.
it's a floating rotor design. toyota and honda puts these screws just to retain them onto the hub, in two opposing places.

i hate when they strip or rust shut!
at times you'll have to drill them out or use an impact driver and lots of penetrating lubricant!

 

Or you can use the right tool. I used to strip some until I realized the big difference between American and Japanese screws and got my Japanese Industrial Standard (JIS) screwdrivers. Haven't stripped any since.
This is the impact driver I use:

 

^ good to know.
I'm sure my impact driver is standard (and has worn bits). totally worth having in the tool box for sure!

 

Here's a Craftsman set:
https://www.sears.com/craftsman-2-pc...p-00986616000P
It says Phillips #2, but it's actually the JIS version. These are made in Japan. Very nice.

 

X 1miilion on the JIS screwdrivers,They are NOT Phillips.
I have this,can get some nice torque with it