This is my thread from when I did this:
https://forums.swedespeed.com/showthrea ... Experience

https://www.matthewsvolvosite.com/forums/viewtopic.php?f=10&t=61996 , easy enough to guess it's the starter itself if the battery is good and all the electrical connections are clean and tight. Another link that might be relevant- https://forums.swedespeed.com/showthread.php?562025-2011-V8-Slow-...

The starter could be a little weak, it's a common problem on these V8s. If it's running well otherwise, this is likely your issue. My starter is a little weak at times as well, especially when it's hot, but it always starts. When they test the starter, they're basically just testing to make sure it ...

I believe you need to remove a smaller coolant line or heater hose to access the starter on this engine. You may not need to drain it completely if you have some of those hose clamp-off pliers, but it will certainly help to minimize the mess. It's probably not too urgent as long as the starter isn't...

That's an alternator writeup. For the starter, I believe it's accessed from above. It's located below the throttle body, I think you need to remove a couple coolant lines and possible the throttle body to access it.

try using a blowdryer or heat gun to heat it up and then rub over it with ice cubes. or a can of compressed air (upside down) to freeze it.

Volvos are tough metal. My body man says they are the worst to work on because they are the best for safety. That said I think the solution would be paintless dent repair. Dropping the headliner should give access to the dented areas and a good PDR person can make those look pretty much like new. Be...

I just did new hoses and did not see anything but the normal drain, this is what I used before pulling the lower hose. It's under the big silver colored crossmember-

Need to undo this plug carefully - some owners tighten these too much and they are difficult to undo next time and may also break. I talk a little about this small plastic plug at 6:00 here www.youtube.com/watch?v=69ymGTqHxRw Basically, when screwing it back in place, you can just tighten it by hand...

Just the gasket, PN 30720318. Bolts are M8, torque per VIDA is 24Nm (18 ft lb).

Post a photo of the o-ring if you get the chance, maybe someone can spot where it goes (if indeed it's for your vehicle).