I have a '79 VB 6 cylinder automatic commodore. I've never owned a car before and I'm mechanically challenged....BIG time. I've just spent a hour trying to find an answer to my questions on the web, but I've had no luck so far. In the "owners" manual it says to check the coolant level in the recovery bottle, as well as in the radiator. In the "workshop" manual it doesn't mention checking a recovery bottle, but instead mentions checking an expansion tank. Is a recovery bottle and an expansion tank the same thing? How do I identify them and their location? I thought all I needed to do was to check the coolant level in the radiator, by simply taking off the radiator cap, and topping it up with water if necessary. But it seems I also need to check the recovery bottle/expansion tank as well. As you can see I'm a mechanical dummy in need of help. Thanks for any advice.