When is the last time you performed a coolant system flush on your Volvo? If you can’t remember, it’s been too long! Typical antifreeze and tap water can combine to create scaling and allow deposits of sediment to clog things up. Read on to see why a coolant system flush should be part of your regular Volvo maintenance and how to get the job done.
How to Know When You Need to Perform a Collant System Flush
If you’ve ever looked into your radiator and seen white scale, etc, this scale and sediment is comprised of various phosphorous compounds that have chemically bonded with the minerals found in tap water. Most antifreeze manufacturers (Prestone, Zerex, etc) put a lot of phosphates in their coolants and that’s part of the reason why Volvo Coolant is so expensive. At approximatley $20 a gallon, the extra cost is worth it because the coolant is completely phosphate free.
If you top off your cooling system with tap water while you’re using a phosphate-free coolant, you’re much less likely to get scale and deposits on the inside of your radiator, engine block and heater core. Ideally, a 50/50 mixture of Volvo coolant and distilled water is recommended to keep your coolant system performing at its best. Volvo Coolant also includes conditioners to prolong the life of the various water pump seals, hoses, etc.
Check out the coolant system flush video and start scheduling a flush for every couple of years. You’ll save wear and tear on your radiator, heater core, and engine block.
MVS Forums member Robert shows us in a YouTube video how to do a key winterization procedure: “I flushed the coolant system in my 850. This process should be the same for most FWD Volvos, including the S70, V70, S40, C70, etc.”