smoke coming out of my exhaust pipe on 2002 Toyota RAV4

I've been noticing smoke coming out of my exhaust pipe for 3-4 seconds at random when i 1st turn on my car. this has only happened 3 times, i think it might contribute to the heat but im not sure. should i be worried?

2 answers
No,typical on higher milage engines. Your valve seals are leaking a small amount of oil into the cylinders
won't hurt a thing.It should clear up after a few seconds,as long as it doesen't start
drinking oil, dont worry to much.
COMMON PROB ON HIGH MILEAGE TOY. VALVE SEALS ARE GOING BAD SEEK AN EST