99 Camry valve question

[harkauto]

I did a search and didn't find anything that specifically addresses my question.

I have a '99 Camry 4 cyl that just turned over 150,000 miles. This car is not abused at all and has never towed anything. I put around 10,000 miles on it per year if I'm lucky and change the oil twice a year and use 100% high quality synthetic oil. Probably 50% of the miles each year are highway miles.

I'm wondering about valve adjustment maintenance for this car. I don't hear any obvious loud ticking or knocking noises coming from under the hood and the car runs like a new one.

Someone told me to not worry about it unless I am hearing loud valve train noise from the engine. But being inexperienced at this I'm not real sure what I am to be listening for.

In a properly tuned and adjusted engine, should I hear any kind of valve noise at cold start up at all? And will slight valve noise dissipate after the engine warms up?

Thanks for your help!

[Brian R.]

Don't worry about valve adjustment. They should be quiet and not ever need adjusting.