Moderator: volvite
Yes, the whole system runs at the same pressure. Coolant is coolant. If it's leaking, it will eventually overheat the engine no matter what part of the system it's leaking from. However, small leaks in the heater hoses or core will empty the system more slowly than leaks on the engine side, simply because they're high up in the system relative to the block, radiator, and water pump.
Well, the V6 is different in that the inlet and outlet sides are two different pieces. Also, there are "with rear heat" and "without rear heat" options. I don't know of any options for the V8 Pathfinders, which all probably had rear heat or so I would think? The only option I know of for the V8 w/ rear heat is the genuine Nissan part (outside of doing some kind of rig job). On the V6 Pathfinder w/ rear heat, I did see one that was all metal, but I believe the metal pipes that go to the hoses at the bottom of the engine compartment were a little short. Otherwise, all of the aftermarket replacements appear to be made with the plastic parts just like the genuine Nissan part.
Seems like a good approach!bozoneX wrote: ↑Mon Mar 21, 2022 9:35 pmI replaced the plastic tee with brass and deleted the redundant fitting on my X, haven't touched the Pathfinder yet, but mine doesn't have rear heat so it looks to be the same. It seems like a good idea when you get to a certain age where you notice the hoses looking dry and maybe cracking a tiny bit. Then do all the nearby hoses, plastic tee, and PCV at the same time.
Thanks for the write up and the pics!!donaldpath wrote: ↑Fri Apr 08, 2022 12:53 amWeird
I was messing around with the PCV a couple weekends ago, and in doing so, I ever so sightly nudged the rubber hose that connects to the supposed "inlet" to the heater hose assembly, and the fitting broke clean off.
IMG_20220327_211400.jpg
I went and replaced it with a full metal assembly that I found from watching some YouTube videos on how to swap it out.
Got mine from: https://www.wholesalepartsexpress.com/p ... -dual-air/
$150 shipped.
Here are some images if the joinery that worried me in regards to the flow of coolant. But I figured a more sturdy build was more important.
IMG_20220401_184939.jpg
IMG_20220401_184832.jpg
I just finished installing it thus past weekend. It's not very fun because of the number of various sized hose clamps I had to deal with; 9 IIRC - and half were in tight spaces. Lots of anxiety and stress was exuded in the replacement.
I would had tried the hack fixes of using plastic fitting to rejoin the broken fitting. But something about using an adhesive that could potentially be exposed to coolant system worried me... Plus if that plastic fitting was so easily broken by such light pressure, I worried the other side of the assembly wouldn't be in any better shape.