tite_tite

Upper Radiator Hose (21501-1NA0A)
Lower Radiator Hose (21503-1NA0A)

so my upper radiator hose is seeping & plan on changing it + refilling the coolant.

what's the chance that my lower radiator hose will seep too? i need to change that too? might as well? + if i need to change the lower radiator hose, i will need to burp the system again? mannn.. i think i might have answer my own question there...hahah

upper hose looks easy to change. is the lower hose easy as well?

yes, parts are definitely cheaper at nissan dealership.. part w/ part number is a big help!! thanks a bunch

tite_tite

part number as told by nissan dealership:


21444 JK20A


i'm looking for the black tube or the diameter for the coolant draining as in the DIY video. does anyone know where i can get the black tube at? thanks

tite_tite

watching the video again, i just realize he mentioned the size of the hose to assist w/ the draining. 5/8 ; 16mm

was able to get it @ advanced auto parts. it is in a spool so you can get it by the inch/feet.

pic is 7 inch & it worked good

NOTE: lower drain, hose works good. upper bleed, it is a little tight so you may have to work it in & make it ghetto-fabulous or get 1 size bigger


thanks all for your input

blnewt

iTrader: (13)

Did mine today w/ the Lisle Funnel kit, worked great and thanks for the tip OP about squeezing the upper radiator hose, then inserting that long t-plug to pull the funnel off and keeping the radiator level just below the cap. So much cleaner that way!
And from my measurements I drained 1.5 gallons (including dumping my reservoir tank), then filled the same amount in, seems to be almost exactly the level it was prior.

And my heater hose didn't have a air cap/bleeder either.

takeapieandrun

iTrader: (2)

Just did this, thank you for the extremely helpful video. I used a regular funnel but it spilled just a little bit out of the radiator bleeder hole(didn't have a pipe) and also some overflow from the radiator cap as well, but I just doused the area with some water to hopefully get coolant off of the hoses.

Also, since in have an 07 I had the air valve. Not sure why Infiniti decided to make the car much harder to service after the switch to the G37 nameplate. My buddies G37 coupe has no transmission dipstick, so its a huge PITA to pump fluid in instead of using a funnel, and also doesn't have the bleeder valve.

Brian6t5

I am planning on doing the coolant flush soon and had a few questions. The car has the blue coolant which comes in 50/50 premix in gallons so should I buy more than a gallon or should it be enough? What do you recommend to use to check the freezing point, a refractor or just a regular coolant tester? Thanxs in advance.

bythabay

iTrader: (2)

03Mach69Mach

https://www.ebay.com/itm/OEM-Concent...item237d569ce9

Looks like some Pep Boys may have this in stock.

Dan G37

I have a quick question. Does the car have to be level when draining?

RMB5190

iTrader: (2)

I'd recommend it. Obviously, doesn't have to be perfect but closer the better.

Dan G37

Thanks for the quick reply! Thought it would be better than just having the front off the ground.

JSolo

iTrader: (14)

I'd say having the front lower than the rear is better than the other way around.

Are you removing a hose to drain or unscrewing the petcock? If the latter, probably a good idea to have a new oring to replace with when reinstalling.

Dan G37

I've got a new Oring and just plan on unscrewing the petcock. Would I be able to drain the front without lifting it up at all? Seems like a tight spot.

RMB5190

iTrader: (2)

You can but I had to use a stubby screw driver. Also, don't forget to open the purge valve up top on driver's side. When pouring the new coolant in, do so at a very slow pace as to avoid getting air in the system. I've read about some people needing special pumps and tools but just pour a bit in, wait for bubbles to escape and fluid to drop then pour a bit more in. Slow and steady. Also, don't forget to have someone give the car some revs to open the thermostat. Feel that bottom hose and you will DEFINITELY know when it's opened.

Dan G37

Did the coolant change nice and smoothly. I'm kind of worried now though. I purchased genuine Nissan long life Blue coolant. And my old coolant looked quite blue, but after a few hours it looks green. Is it okay if I used blue coolant instead of green? I heard they are pretty similar. Or should I go ahead and change it out?