Welcome to the Volvo family! As you know it's same as D13 engine. Just deferent cab style. I love Volvo trucks ...
On a Volvo 56-58 psi. And it's very depend on how it's loaded 56psi is a safe number
Thanks God they start doing that. Better late than never...
Graphite spray..
In my experience those tiny lines will jell before every thing else. And yes adding and using winter fuel. Keep running if 0F or less
On balancing, long time ago I had an older 5th wheel camper with those funny looking rims that no one in my area had a machine to balance. So when...
Condense water
Check pulley belt tensioner
Rear bank powered just like any car or cheep build truck with radio not amp.. to gain more sound Volvo use extra sound boost. To avoid next time...
Had to do it before. 100% amp...
Your Amplifier is cooked. $200 or so. Location top passenger side storage the one in a front top corner.