New? Start here. There are 634 Volvo forum users online now. See the forum's active topics. Say hi contact Matthew.
MVS-Amazon link helps MVS!

Coolant System Flush, Volvo 850, S70, V70 – Video

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.”

Coolant System Flush, Volvo 850, S70, V70 – Video

1 Comment

I bought a used Volvo and the day after the radiator blew and the car died so we replaced the radiator , hoses , and thermostat filled with coolant started it up now its misfiring on cylinders 2 and 3 and my erg, cat, air, o25, and a few other sensors are flashing on my dyc system can some one please tell me if my car is done for I love this car and im lost at the same time

Leave a Reply