Coolant question

Zeetah · 06-18-2017, 12:45 PM

I was going to top up my coolant, do you fill through the radiator or reservoir.

Also brake fluid, but thats obvious where it goes.

Thanks in advance

Louie cat · 06-18-2017, 01:44 PM

The reservoir. you only need to open the main if you doing a flush

SouthArk370Z · 06-18-2017, 01:47 PM

Reservoir. It will suck the fluid into the radiator as coolant temp cycles.

Jsolo · 06-18-2017, 04:14 PM

I'd say the answer depends on which is low. If the radiator is all the way at the top, I'd just top off the reservoir to the full cold mark. If radiator level is low, then proper coolant should be added to both.

Zeetah · 06-18-2017, 04:19 PM

Quote:

Originally Posted by Jsolo

I'd say the answer depends on which is low. If the radiator is all the way at the top, I'd just top off the reservoir to the full cold mark. If radiator level is low, then proper coolant should be added to both.

Ugh? Lol

But the other guy said just fill the reservoir and it sucks fluid through the radiator

fryzia23 · 06-18-2017, 04:50 PM

Quote:

Originally Posted by Zeetah

Ugh? Lol

But the other guy said just fill the reservoir and it sucks fluid through the radiator

Top off through radiator cap only if you're reservoir became totally empty with no trace of coolant, then top off reservoir to max line.

SouthArk370Z · 06-18-2017, 04:55 PM

Either way will work. You might have to top off the reservoir a few times if the radiator is not full, but, since you are just topping off, there shouldn't be any air in the radiator.

Chan Chee Hoe · 06-18-2017, 07:08 PM

If the Coolant level keep dropping,check for Leaks,i owned the Car over 8 years,not even once needs to top up Coolant.

Zeetah · 06-19-2017, 01:49 PM

Quote:

Originally Posted by Chan Chee Hoe

If the Coolant level keep dropping,check for Leaks,i owned the Car over 8 years,not even once needs to top up Coolant.

No way? There's no leaks I checked a few times, I park on my garage. It's at the low line I believe. I'll have to double check

Jhill · 06-19-2017, 04:10 PM

Quote:

Originally Posted by Zeetah

No way? There's no leaks I checked a few times, I park on my garage. It's at the low line I believe. I'll have to double check

Coolant is not something you should have to be adding consistentl. the radiator portion is sealed so evaporation is non existent and the amount of evaporation from the reservoir is very minor. If your adding all the time then you have a leak.

phunk · 06-19-2017, 05:16 PM

Yup its a sealed system. If there isn't a cooling system leak, the only way for coolant to really escape is if you overheated the engine causing the overflow tank to, overflow! It will actually dump right on the ground through a dump tube when it reaches capacity.

Isnt the low line on the reservoir just the cold fill line? I was going to double check and look at mine but my reservoir is currently MIA (car in a million pieces).

06-18-2017, 12:45 PM	#1 (permalink)
Zeetah Enthusiast Member Join Date: Jan 2014 Location: Z Posts: 395 Drives: z12 Rep Power: 11	Coolant question I was going to top up my coolant, do you fill through the radiator or reservoir. Also brake fluid, but thats obvious where it goes. Thanks in advance

06-18-2017, 01:47 PM	#3 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	Reservoir. It will suck the fluid into the radiator as coolant temp cycles. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

06-18-2017, 04:14 PM	#4 (permalink)
Jsolo Track Member Join Date: Dec 2011 Location: chicago Posts: 783 Drives: '12 G37 6MT Rep Power: 15	I'd say the answer depends on which is low. If the radiator is all the way at the top, I'd just top off the reservoir to the full cold mark. If radiator level is low, then proper coolant should be added to both. __________________ G37S Sedan 6MT, Eibach swaybars, Invidia Exhaust, Weaker Clutch Pedal Spring For sale links

06-18-2017, 04:55 PM	#7 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	Either way will work. You might have to top off the reservoir a few times if the radiator is not full, but, since you are just topping off, there shouldn't be any air in the radiator. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

06-19-2017, 05:16 PM	#11 (permalink)
phunk A True Z Fanatic Join Date: Mar 2009 Location: Chicago Posts: 3,668 Drives: 370 Rep Power: 974723	Yup its a sealed system. If there isn't a cooling system leak, the only way for coolant to really escape is if you overheated the engine causing the overflow tank to, overflow! It will actually dump right on the ground through a dump tube when it reaches capacity. Isnt the low line on the reservoir just the cold fill line? I was going to double check and look at mine but my reservoir is currently MIA (car in a million pieces). __________________ Charles @ CJ Motorsports : Website \| Facebook \| Instagram \| YouTube Home of the 9 second, stock longblock, stock drivetrain 6MT 370z. 9.91 @ 142mph

06-18-2017, 01:44 PM	#2 (permalink)
Louie cat Enthusiast Member Join Date: Mar 2016 Location: florida Posts: 261 Drives: 2010 Nismo 370z Rep Power: 142	The reservoir. you only need to open the main if you doing a flush

06-18-2017, 07:08 PM	#8 (permalink)
Chan Chee Hoe Track Member Join Date: Mar 2009 Location: Singapore Posts: 861 Drives: 370z,Yellow,7sp A Rep Power: 17	If the Coolant level keep dropping,check for Leaks,i owned the Car over 8 years,not even once needs to top up Coolant.

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