Toyota Repair: Coolant question

Question
QUESTION: Hi Ted,

Week ago had water pump replaced in my 2010 Honda.  Coolant was also replaced. Before this was done I never had an issue maintaining coolant level in reservoir.  Since the repair coolant level in reservoir is slowly going down.  Since the repair I have twice added a small amount to raise level to max when hot and it continues to slowly drop.  Have checked level in radiator several times and it is to top.  Temp gauge indicates it is holding same as in the past.  Could this possibly be a function of air trapped in system because system was not bled or "burped" after new coolant was placed in system?

Regards,
Ernest

ANSWER: Yes, that is a possibility, put a few more miles on I while checking it, it should be ok after about 200 miles or so, if not take it back and have the cooling system pressure checked fo leaks.

---------- FOLLOW-UP ----------

QUESTION: Hi Ted,
Thanks for your response to my question regarding coolant loss in reservoir.  I am taking your advise and will keep a close check.
As I have been checking coolant regularly I have noticed immediately after engine is cut off a small amount of coolant is seeping around the radiator cap and running down the filler neck...had not noticed this until the last couple of days.  Is this an indication that cap is going bad.  Do you think this a continuous loss of coolant or just when the pressure in the cooling system builds immediately after stopping engine...in other words if I take off on a trip am I going to reach the point where coolant has continuosly leaked out and I am going to experience a roadside cooling system failure (overheating)
Just for info I called local Honda dealer today to see if they carried replacement radiator cap for my 2010 Honda Accord and he said they did not...stated very unusual for 5 year old OEM cap to go bad.  This just adds more puzzle to my coolant issue.

Thanks in advance for your assistance and opinions.

Regards, Ernest

Answer
It's not normal for the cap to leak, no matter what the year or mileage, go get a new radiator cap and see what happens, most radiator shops, gas stations with repair shops and auto repair shops and some auto parts stores can test the cap for you to see if it actually needs to be replaced.