Valve Clearance question 1AZ-FE VVTI engine

[Blunt Instrument]

Hi,

 

Just joined after buying a 2005 Rav4 with 1AZ-FE engine ( 16 valve VVT-I ) for my daughter.

Engine has 120,000 KM

Going through a service and checked the valve clearances .

4 of the intake valve gaps ( 2 cylinders) are at the limit of .29mm and I am wondering if I should pull the cams off to replace those buckets while I have it opened up.

Dreading finding issues with re-setting the cam timing after removing the cams as I don't think I could tilt the camshaft up enough to remove the buckets while the chain is still on the end.

My question is ;

Does anyone know if the valves seat in with age , therefore closing up the gaps or does the reverse happen and I will have to change the 4 buckets to those valves?

All of the exhaust side and remaining intake are in tolerance and there is no tappet noise, cold or hot.

I tend to think that the valves would seat deeper with wear, thereby closing the gap.

The gaps would also close as engine temperature increases, I think.

Happy to be corrected by advice from far better people.