Engine Question For Someone Mechanically Minded!

[GM]

I have a Bravo 1.4sx with 62k miles on the clock. I got the cambelt and tensioner done at 47k so no worries there, hopefully! However, in the last few months i have noticed the engine getting a bit 'tapetty', kinda like an old fiesta/escort. Its only noticable from inside the car, not so much from outside or in the engine bay. I have read a few posts saying that the 1.4 oil feed to the camshaft clogs up thus starving it of oil. Do you think this is what's happening? If it is how long do i have before serious damage occurs? What if any, is the fix and how expensive?
Any advice would be appreciated...
Thanks

 

[andy]

when u start up in the morning the engine sounds like a fiesta anyway,this is because the tappets are hydraulic an the oil has not reached them in full flow,after about 5 mins it sounds ok so i reckon ur struggling with the oil feed,ive got a 1.2 16v and it sounds like a rite shed till its warmed up,