Properly flushing/bleeding radiator fluid? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

swift996 · 01-30-2014, 09:10 AM

Sorry for the basic question but I saw somewhere that you should bleed the coolant system via a bleed screw by the firewall.

I plan to replace my radiator tomorrow night with an aftermarket one and was wondering if anyone could help me understand the procedure for filling and ensuring proper system performance?

I found this DIY:
http://www.hps-siliconehoses.com/wp/...llation-guide/

Would I fill via the fill and use loosen the bleeder screw until fluid drips out? Is this with the car off or on? Sorry for the basic question. In the past, I've just filled and went on in life.

Mikem53 · 01-30-2014, 09:38 AM

Quote:

Originally Posted by swift996

Sorry for the basic question but I saw somewhere that you should bleed the coolant system via a bleed screw by the firewall.

I plan to replace my radiator tomorrow night with an aftermarket one and was wondering if anyone could help me understand the procedure for filling and ensuring proper system performance?

I found this DIY:
http://www.hps-siliconehoses.com/wp/...llation-guide/

Would I fill via the fill and use loosen the bleeder screw until fluid drips out? Is this with the car off or on? Sorry for the basic question. In the past, I've just filled and went on in life.

Yes.. Open bleeder screw, fill.. Fluid should push the air out, when you see fluid, close and drive.. Most systems will push air out through the expansion tank tube, this is just a way to bleed the system quicker. Being flat and weird has its quirks..

SubaSteve · 01-30-2014, 02:50 PM

Quote:

Originally Posted by Mikem53

Yes.. Open bleeder screw, fill.. Fluid should push the air out, when you see fluid, close and drive.. Most systems will push air out through the expansion tank tube, this is just a way to bleed the system quicker. Being flat and weird has its quirks..

Yeah when doing my install we didn't use the screw..... It takes a good amount longer for the air bubbles to get out.

01-30-2014, 09:10 AM	#1
swift996 Senior Member Join Date: Nov 2011 Drives: Subaru BRZ Limited 6MT Location: Winston-Salem, NC Posts: 2,432 Thanks: 712 Thanked 954 Times in 545 Posts Mentioned: 47 Post(s) Tagged: 0 Thread(s)	Properly flushing/bleeding radiator fluid? Sorry for the basic question but I saw somewhere that you should bleed the coolant system via a bleed screw by the firewall. I plan to replace my radiator tomorrow night with an aftermarket one and was wondering if anyone could help me understand the procedure for filling and ensuring proper system performance? I found this DIY: http://www.hps-siliconehoses.com/wp/...llation-guide/ Would I fill via the fill and use loosen the bleeder screw until fluid drips out? Is this with the car off or on? Sorry for the basic question. In the past, I've just filled and went on in life. __________________ Innovate Supercharged Black Limited BRZ 6-Speed MT(Build Thread) 2010 Cadillac CTS-V Sedan M6 w/550whp (Build Thread)

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