Did you do a glove test? Main reason is to see how bad the system is. If it is a serious clog, you have a decent chance of solving the PCV issue and resolving the problem, but then it does have high miles.

For a car with 191k that pan looks very good. If you have not put the pan back on use some grease to hold the o-rings in place (put it in the fridge or freezer if it is too thin) and make sure you use anaerobic sealant and not RTV. Before putting the sealant on it helps to do a dry run (a second pai...

fcpeuro has a video on the inner CV boot. https://blog.fcpeuro.com/learn-how-to-replace-your-volvo-inner-cv-joint-boot The outer boot is pretty straight forward. It may or may not have an internal circlip which needs to be removed. Remove it and tap out the joint. Clean it all up and put boot on the...

Take it apart as far as you can. I managed to get one all the way down, another only half. Either way clean it as best you can, spray it with solvent. Then pack it with grease and you are good to go. As described above, the bearings are super old tech. Robust and servicable if not water damaged. Eve...

If you provide the exact model S60 you have, engine mainly, one could look up the part number for replacement lifters. Some Volvo engines have hydraulic lifters and some don't. See this post: https://www.matthewsvolvosite.com/forums/viewtopic.php?t=45924 Another reason to keep them in order is to ma...

I have not owned nor serviced that year of AW transmission. The post you linked seems to show it is the same as the earlier AW Volvo models. If it is like the other AW transmissions in Volvo form - just do a drain and fill and circle back in 10k miles and do another. After that do a drain and fill e...

Pgill gives excellent advice. Pay attention to the condition of the spark plugs you remove. Also look down the spark plug well with a flash light and look at the piston tops. If you have an oil burn condition you will see oil fouled plugs and oily piston tops. This can be due to the rings being worn...

The codes you listed, I cut and pasted, state "Temperature sensor 1". (maybe this is integrated into the MAF - I don't know). Regardless I would look at the temperature sensor in your picture. You can try unplugging it and see if you get the hard code (which you should as the signal would ...

Sometimes the best approach is to start at the most difficult point and keep the piping free floating so you can go in straight. By securing the piping along the way it causes the end to twist enough that a straight in cannot be achieved. So snake it into position, use some wire or zip ties to hold ...

I have fought this battle on my old Range Rover, Audi and Subaru. So far not on a Volvo. The list you provided is about right. I have had the most success with cutting off the bolt end and hitting the bolt end with an impact wrench to get it to spin. Then spray and spin and spray and spin then pound...