Silicone coolant hoses

ZoomZ · 06-14-2026, 09:25 AM

Can we bleed/fill the coolant system with the vacuum method, with silicone hoses installed?

Can the Silicone hoses collapse like rubber or are they much tougher and/or get damaged?

Second question. Do I use the pressurized reservoir for bleeding in either vacuum method or gravity funnel method?

k67p67 · 06-15-2026, 10:56 PM

I have bled the coolant system multiple times with an Airlift vacuum tool and silicone hoses without issue. In my 2017 Nismo, the rubber cone went in the neck with the pressurized cap, not the reservoir.

ZoomZ · 06-16-2026, 11:42 AM

Quote:

Originally Posted by k67p67

I have bled the coolant system multiple times with an Airlift vacuum tool and silicone hoses without issue. In my 2017 Nismo, the rubber cone went in the neck with the pressurized cap, not the reservoir.

Thanks. I am also a 17 Nismo. The reservoir also has a pressure cap but I will use radiator as vacuum point.

Thanks

ZoomZ · 06-16-2026, 11:53 AM

Quote:

Originally Posted by k67p67

I have bled the coolant system multiple times with an Airlift vacuum tool and silicone hoses without issue. In my 2017 Nismo, the rubber cone went in the neck with the pressurized cap, not the reservoir.

is this the tool?

https://www.amazon.ca/550500-AirLift...A3DWYIK6Y9EEQB

Spooler · 06-16-2026, 12:33 PM

The pressurized systems are very easy to bleed the air out. Never saw a need for a vacuum bleeder.

k67p67 · 06-17-2026, 12:36 PM

https://www.amazon.com/UView-550000-.../dp/B0002SRH5G

I use this on all my cars. It's quick and makes refilling the system a no-brainer. Much faster than using the Lisle funnel.

Oh, and yes to your correction about the caps. Not sure why the caps on my Infiniti Q70 are the other way around even though it also has a VQ37VHR.

ZoomZ · 06-17-2026, 12:46 PM

Quote:

Originally Posted by k67p67

https://www.amazon.com/UView-550000-.../dp/B0002SRH5G

I use this on all my cars. It's quick and makes refilling the system a no-brainer. Much faster than using the Lisle funnel.

Thank you. I got version II coming. I know its plastic and doesn't have many adapters, but I like the one hose operation. It won't break the bank if I have to revert back to the Lisle funnel.

06-14-2026, 09:25 AM	#1 (permalink)
ZoomZ Track Member Join Date: Jan 2017 Location: Vancouver, BC Posts: 817 Drives: 17' 370Z Nismo Rep Power: 40657	Silicone coolant hoses Can we bleed/fill the coolant system with the vacuum method, with silicone hoses installed? Can the Silicone hoses collapse like rubber or are they much tougher and/or get damaged? Second question. Do I use the pressurized reservoir for bleeding in either vacuum method or gravity funnel method? __________________ “Action without vision is a nightmare.”

06-15-2026, 10:56 PM	#2 (permalink)
k67p67 Enthusiast Member Join Date: Oct 2016 Location: Rancho Cucamonga, CA Posts: 317 Drives: 2017 Nismo Tech 6MT Rep Power: 3938	I have bled the coolant system multiple times with an Airlift vacuum tool and silicone hoses without issue. In my 2017 Nismo, the rubber cone went in the neck with the pressurized cap, not the reservoir. ZoomZ and KapitalZ like this. __________________ SOLD2017 370Z Nismo Tech 6MT PART OUT IN PROGRESS Work \| Motordyne \| Powertrix \| Swift \| Michelin \| Takeda \| Hotchkis \| RJM \| Voodoo13 \| SPL \| SPC \| Z1 Motorsports \| ZSpeed \| Morimoto \| Craft Square

06-16-2026, 12:33 PM	#5 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 14,169 Drives: 2013 Nismo 370z Rep Power: 2684394	The pressurized systems are very easy to bleed the air out. Never saw a need for a vacuum bleeder. ZoomZ likes this.

06-17-2026, 12:36 PM	#6 (permalink)
k67p67 Enthusiast Member Join Date: Oct 2016 Location: Rancho Cucamonga, CA Posts: 317 Drives: 2017 Nismo Tech 6MT Rep Power: 3938	https://www.amazon.com/UView-550000-.../dp/B0002SRH5G I use this on all my cars. It's quick and makes refilling the system a no-brainer. Much faster than using the Lisle funnel. Oh, and yes to your correction about the caps. Not sure why the caps on my Infiniti Q70 are the other way around even though it also has a VQ37VHR. ZoomZ likes this. __________________ SOLD2017 370Z Nismo Tech 6MT PART OUT IN PROGRESS Work \| Motordyne \| Powertrix \| Swift \| Michelin \| Takeda \| Hotchkis \| RJM \| Voodoo13 \| SPL \| SPC \| Z1 Motorsports \| ZSpeed \| Morimoto \| Craft Square Last edited by k67p67; 06-17-2026 at 12:53 PM.

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