My girlfriend's 1998 V70XC timing belt tensioner went bad at 90K miles. She took it to a shop who quoted her "At least $2500" to fix it. I talked her into letting me take a crack at it instead. She has already gotten a new car, so I'm mostly fixing this one to try and sell it. Her family has owned the car since it was new, and they've always kept up on maintenance, so it's been a very clean job so far, and I don't imagine it will be difficult to sell.
I've gotten the head off, and can see that two valves from the center cylinder are clearly bent, but the rest appear to be fine.
I put the head upside down on a bench, and filled each of the valve chambers with liquid WD-40 to try and see if they were really still sealed. (Not exactly scientific, but the best I could do) After waiting half an hour, none of the WD-40 had leaked out, so as far as I can tell, they're all fine except for the ones in the center chaimber. I also poured WD-40 into the combustion chaimbers on the block to see if any of the cylendar seals were severely damaged. Again, nothing appears to have leaked out.
Take a look at the embedded pictures to see what I'm dealing with.
As you can see, there is some surface damage to the pistons, but several mechanic friends tell me that I shouldn't need to worry about it.
Now my next step is to either have the head rebuilt, or try and replace the valves myself. I found THIS
thread, which should have everything I need to know, but the photos won't load.
Can anybody tell me if a valve replacement is a do-it-yourself option? I've done it on OHV vehicles, and have a valve spring compression tool, but I've never done this on an OHC head.
Also, can anybody tell me if I'm crazy to only want to replace the valves that appear to be damaged? Since the other valves appear to be sealed correctly, I'd prefer to not mess with them.
Finally, where would you guys suggest I get the valves to put in?
Thanks, from Maryland.