[Intuit]

Never replace the plugs while the engine is hot. Since you're driving it to the parking lot they will be hot. Even though it may not seem hot on the outside, at the core it will be. Touch the actual block and get scolded - your combustion chamber will be ~this temp.

Plugs should be replaced after letting it sit overnight. Plugs will have to be removed and regapped several times through-out the vehicle's lifetime. Eventually you'll have to replace them too. Each time you remove and replace them you're causing some damage to the threads. Replacing them on a cold engine minimizes the amount of damage not only because the metal parts will have contracted, but also because aluminum won't be as soft when at ambient air temperatures.

Agree with AZTW on aligning the timing marks... you might be able to turn the engine slowly. But if not, then you will have to remove the plugs before you'll be able to turn the engine.

Molded hoses should be fine though... just check them for signs of dry-rot or bulges both tiny/large. Vehicles as old as 15 years still have their original molded hoses. Liquid silicon lubricant helps protect rubber parts from dry rot.

Capture the coolant and take it into a service center for disposal. Don't reuse it. Exposure might rapidly break down it's anti-corrossive additives. Clogged heater cores and radiators are a *itch on any vehicle. Most often home mechanics just end up replacing them.

Replace with a 55/45 mix coolant/water and always add 50/50 mix thereafter. Never add/top-off with straight water even during the Summer. In recent frigid weather I've seen wwwaaayyy too many vehicles on the side of the highways. These are most likely folks who have topped-off with straight water during the warmer months.