The Sierra Cosworth soon is 40 years old and so are many parts in these cars. As long as you don't change/remanufacture many of those parts they might get stuck, that's right. (Brake pressure pump, brakes, switches, speedo etc.) But it won't cure the initial problem.

Plus: starting the engine every week while the car is stored away will significantly reduce the durability of your engine. Cold starts are never good. But when it's running for a few minutes (or less) it never gets totally warmed up so you'll end with a lot of condensation in the engine and in the exhaust. I don't think I have to explain anyone what this means!?

There's a good reason why every expert in storing classic cars advises you to store it as dry as possible, change the oil before the winter, block openings like the exhaust or the carbs with oily rags, lift it in the air and leave it alone for the winter.