Good thing is they dont over heat easily assuming the cooling system (the fan and associated tins that direct the air over the motor) is in proper working order. Keep in mind that the aircooled bug was was relatively unchanged for around 60 years and VW produced over 21 million of them, they had to be a little bit reliable. Just change the oil and filter/screen religiously; adjust the valves every other oil change and it should stay running. A good book to get and read is 'How to keep your volkswagen alive', Id recommend it for anyone looking to learn but not get overwhelmed with info.