[XC20]

Yeah, that one.

I did my homework, asked around, read forum posts here, and spent quite a bit of time making sure I had everything needed to replace "while I was in there" - while doing my valve covers last month. I did a few other hard to reach hoses such as pcv, rocker cover to cover, swapped an ignition coil, cleaned every electrical connector, etc etc.

I have not seen this hose mentioned while myself and others have asked "while im in there, what should I do"

It is hiding underneath the intake, under the fuel rail, on top of the engine. It is about 3-4" long.
Trace the longer (passenger side) oil cooler hose up, to the hard line across the engine, which bends in and to 21306-EA200.

FOR THOSE OF YOU DOING INTAKE/VALVE COVER WORK IN THE Future
Get this hose and change it while you're in there.
I'm pretty pissed to say the least. I wasn't aware of this one, didn't see how while we were focused on the task at hand, and really wished I would've known about it. The thing is hard as a rock and damn it bothers me that it's not changed.

Just passing this along. Make this hose a sticky or something for Ukraine's sake

 

[87iroc]

I'll bite. What is it?

 

[Lowcountry idn]

I know what it is - have new one - but haven't done it yet. Did you have to pull the fuel rail?

I am also waiting to do my valve covers to do it at the same time - although there is a thread on here doing it directly from the top. I'll see if I can find it.

edit - found it Can you Change the Oil Cooler Water Hose at the Intake?

 

[XC20]

I know what it is - have new one - but haven't done it yet. Did you have to pull the fuel rail?

I am also waiting to do my valve covers to do it at the same time - although there is a thread on here doing it directly from the top. I'll see if I can find it.

edit - found it Can you Change the Oil Cooler Water Hose at the Intake?

Dang, good find
If I can do this without removing the intake plenum, fuel rail, etc, I will be very happy

 

[Jarek]

Thank you for posting THIS!
I am about to replace my valve covers and definitely will add this PM item to the list. I am thinking about getting this set:

Silicone Coolant Hose Set, VQ40 Nissan Xterra, Frontier, Pathfinder, Suzuki Equator — OffroadGorilla.com

Free shipping within the continental US! ***We are now only selling in-stock hoses and in the following colors: blue, black, red, gray.*** This set fits the following vehicles: 05-23 Frontier. 05-15 Xterra 05-12 Pathfinder 09-13 Suzuki Equator During checkout you will be prompted t

www.offroadgorilla.com

Is this an overkill?

Jarek

 

[XC20]

Thank you for posting THIS!
I am about to replace my valve covers and definitely will add this PM item to the list. I am thinking about getting this set:

Silicone Coolant Hose Set, VQ40 Nissan Xterra, Frontier, Pathfinder, Suzuki Equator — OffroadGorilla.com

Free shipping within the continental US! ***We are now only selling in-stock hoses and in the following colors: blue, black, red, gray.*** This set fits the following vehicles: 05-23 Frontier. 05-15 Xterra 05-12 Pathfinder 09-13 Suzuki Equator During checkout you will be prompted t

www.offroadgorilla.com

Is this an overkill?

Jarek

Not overkill at all. I cant speak on whether silicone hoses are better than rubber - I have no idea. But they seem like a great idea and the kit just makes so much sense.
I wish I would have gotten something like that.
I like how z1 offroad has separate hose kits for coolant, EVAP, etc. Saves A LOT of time studying Nissan diagrams.
Just get the kit and youre covered. I like how you can see easily whats been replaced later on too. I forget which hoses I replaced after a year or so (mud, dust, etc makes everything look the same age)

I just did my valve covers and added an intake manifold spacer. Replaced hoses in the area -(valve cover to cover, one other one up top) but had no idea about this little bastard (21306-EA200). Didnt even see it right there as we were focused on everything else.

It turns out General Tarfun figured a way to get it with the intake/fuel rails in place. But I havent seen it mentioned elsewhere - which is odd. It should be stickied or something. I'll have to try to replace it while everythings bolted on, but it's a bit worrisome as I dont want to have to go through removing EVERYTHING again.

PLease Let me know if you have any questions before or while doing the valve covers. I learned a lot the hard way
For instance - the throttle body was very dirty, take time to clean it. The coolant lines from it were trashed - need replacing. The lines running under their were trashed. The electrical connector to the T-body broke. Had to replace.

I'll stop for now. But yeah reach out if you have questions

 

[XC20]

DIY: Rubber Hose Replacement (Nissan part numbers and...

Enjoy this DIY thread for the replacement of ALL you rubber hose's for the 4.0L engine (coolant, vacuum, EVAP, PCV, oil cooler, heater, ect...). There are a few other parts too: thermostat, PCV valve, brake booster check valve, EVAP test port, fan clutch, radiator cap, overflow tank cap. In...

www.clubfrontier.org

This is a very nice pictorial guide as well. Shows where and what hose for coolant, EVAP, etc. Wish I had found this prior to my valve cover job

 

[Revolution Xer]

It's a coolant hose and can only be accessed by removing the fuel rail.

I replaced every coolant and evap hose except this one......oh well.....life goes on.

If it were a major trouble spot, I figure we'd be talking about it....but nobody is.

 

[XC20]

It's a coolant hose and can only be accessed by removing the fuel rail.

I replaced every coolant and evap hose except this one......oh well.....life goes on.

If it were a major trouble spot, I figure we'd be talking about it....but nobody is.

Still a 14 year old hose
General Tarfun apparently figured a way to replace it without removing the intake manifold and fuel rail