Hello fellow Volvo lover,
I need some advice. Here is a short story on what happened. had a exhaust cam gear seal leak, I bought a new cam gear with the seal. I used the tool to hold the cams in place. I did everything by the book, but I guess not cuz on my 5th try I lost compression. Skip forward I removed Head bend most valves and ding e piston tops see pictures.

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here is image of clean head
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ADVICE 1--
I am looking for new Intake/Exhaust valves. Price from $8-64 /valve. which one to get? I cannot afford $64/valve but I need to know what is difference most of them say OEM or OES.
ADVICE 2--
See pictures of piston tops do i have to replace, I had a mechanic look at them and he said no problem i can use them but i would like 2nd opinion.
thank you

 

i would replace the piston if it were my car. its better to be safe than sorry

 

what about the valves? what is the difference?

 

No need to replace the pistons. Just smooth out the edges around the indents so there are no hot spots developing.