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Discussion Starter · #1 · (Edited)
Group - I own two low mileage Rs now and have a question about the lifespan of the cooling system components.. As an owner of an older RWD 940 as well, I know that if you push any of these components past their prime, it becomes a ticking time bomb because there are no warning lights (on the 940) to warn you coolant is low and/or your temp gauge is in the red, a design flaw IMO. Granted the R has a low coolant warning but I want to be proactive and don't want to ever deal with a fried head gasket. At what age mileage do I need to replace coolant hoses and what other components should I do as well? Thank you.
 

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Um the S60s have coolant level indicators lights, at least my T5 does.

As for maintenance I change my coolant every 4 to 5 years and occasionally use test strips to test the cooling ability/ ph of the coolant. When I change it I usually use OEM or OE supplier for coolant, and mix with distilled water to reduce the risk of contaminating the rest of the cooling system. I haven't changed it in the Volvo yet since my ph test was right where it should be and the car had only been serviced at the dealer.
However, if the coolant fails the test I change more frequently (obviously).

The hoses, reservoir and radiator I try to visually inspect every oil change. The water pump is fairly solid and Volvo does not recommend changing until the second timing belt change, my indy when I brought my 05 T5 in says he has never seen a water pump failure in these cars and didn't recommend changing, searching around pretty much confirmed this.

If your coolant is original I would definitely change it since it is at least 7 years old and it is long over done, the same probably goes for the hoses but I would visually inspect them and see if they feel soft or look bloated in spots. At this age it is probably a good idea to have a set on hand anyway.
 

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IIRC coolant should be changed every 60K per volvo but people rarely do. When you do change it you should replace the t-stat as well because there has been one failture noted on here where it failed and the car overheated (over 100k). While your at it wouldn't hurt to change the level sensor to keep things fresh. Also agree with above using distilled water, it will keep any buildup from forming.

At a minimum I would do these, which is what I did when changing the coolant at 90k. Also added silicone lines.
http://www.fcpgroton.com/product-ex...t+with+O-Ring+(2001-2002)+87+Degrees+(Wahler)
http://www.fcpgroton.com/product-ex...rbo+Thermostat+Housing+Gasket+2002-2008+(OEM)
http://www.fcpgroton.com/product-ex...+Coolant+Level+Sensor+2001-2007+(Aftermarket)
 
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