I have about 200k miles and thinking to change sparkplugs - can I get input on best proper type/brand ?

 

I'm a big fan of using OEM Volvo. They come pre-gapped and match your model's ignition type. Try shopping a Volvo friendly store like IPD or FCP or a Volvo dealer store like Tasca Parts to get a discount off list. To me its not worth trying to save $5 for a part that is gonna last 60K+ miles (meaning the rest of your car's life) and there's really no performance advantage for high tech plugs that may be the wrong heat range or size.

 

thank you - by the way - you have knowledge of serpentine belt replacement ?

 

I've only done it on an 850T which requires a special tool to release the tensioner - its a flat bar with what looks like a 5/8 inch square on the end. Newer Volvos use a more standard tool but check ICP or FCP for a tool specific to your engine. Not much room by the nose of the engine for standard tools. I'm sure there is a RobertDIY video on Youtube or similar (FCP posts a lot of blog vids too). When you release the tension the belt can slide off the idlers and pop out. You can find a diagram either on a sticker under the hood or online. Once the belt is off, check the idlers and accessories for any play or grinding (ie worn out bearings) and replace anything suspect.