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Discussion Starter · #1 ·
Next weekend I'm thinking of flushing my radiator. I'm ordering new evolve silicone radiator hoses and was wondering how to go about flushing the radiator. I did one years ago on my fathers old pickup.
 

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Re: radiator flush (sinisin63)

I did mine about 6 months ago. I did not use any cleaning agent in the cooling system. I put the front end on jackstands then I opened the drain valve on the bottom of the radiator.<p>There is a handy hole in the lower air guide to access it. I drained the old anti freeze into a large Rubbermaid storage container. When the radiator was empty, I closed the radiator drain valve and opened the engine block drain valve under the car on the right rear side of the block. The drain valve is at the end of an extension on the back of the block<p>Once the block is drained, close it. and do a fresh fill of 1/2 genuine Volvo coolant and 1/2 distilled water to the fill line.<p>Start the car up, turn on the heater, wait for the thermostat to open, top off the coolant bottle to the fill line with the half and half fill.<p>Monitor the bottle for a day or two to make sure its still at the fill line. Top off as needed.<p>Lots of opinions on whether you HAVE to use Volvo coolant or not. Yeah, it's pricey but I don't use anything else. All I know is that also I have a 98 Volvo pushing 200K miles and I've had zero (0) problems with the cooling system on either car. Works for me. <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/biggrin.gif" BORDER="0">
 

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Re: radiator flush (redalrt)

Yes, make sure to monitor the level over the next week or so. You'll invariably have bubbles that work it's way around and drop the level.
 

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Re: radiator flush (redalrt)

I assume I have to purchase the volvo coolant at the dealer? Anywhere else I can purchase it? I'm in the middle of nowhere. <p>How much do I need to purchase, a gallon?
 

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Re: radiator flush (redalrt)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>redalrt</b> »</i></TD></TR><TR><TD CLASS="quote"><br>Start the car up, turn on the heater, wait for the thermostat to open, top off the coolant bottle to the fill line with the half and half fill.<p>. <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/biggrin.gif" BORDER="0"> </TD></TR></TABLE><p>While it certainly does not hurt anything, the days of turning on the heater to make sure the heater core is full, are pretty much over. <p>Volvo HVAC systems have coolant flowing through the heater core at all times. There is no valve. Doors and flaps controlled by stepper motors block off the heater core as required.
 

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OR!<p>You could just wait untill it cracks, and change the radiator.<p>I did that with my Evolve hoses, it leaked, so i replaced/flushed/changed radiator hoses all at once.<p>Just kidding tho.
 

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Re: radiator flush (sinisin63)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>sinisin63</b> »</i></TD></TR><TR><TD CLASS="quote">I assume I have to purchase the volvo coolant at the dealer? Anywhere else I can purchase it? I'm in the middle of nowhere. <p>How much do I need to purchase, a gallon?</TD></TR></TABLE><p>Yes at the dealer. One gallon will make 2 gallons of the half and half mix. Call around to some of the mail order dealers, Tasca Volvo, Boston Volvo Villiage, etc. Maybe you can get it mail order? <p>But then again, some folks are using Prestone and other brands, only making sure that the antifreeze is phosphate-free. That would be a whole lot easier.
 

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Re: radiator flush (redalrt)

Thanks redalrt for the tips. I need to flush my coolant also, and I didn't know about the engine block drain valve.
 
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