Long story short I was at a light about 1/2 mile from home and noticed my coolant temp on the ultra gauge was climbing a little higher than usual. Light turns green and I begin driving and it starts to drop. Pull into my neighborhood and it starts climbing at low speeds again. Turn on my street and temp is just under 220F. Cut my engine off at 221F and can hear it from inside. My coolant is emptying out on my driveway. Not a leak, a full on waterfall. Not much I can do with the engine and fluids hot, plus my kids ice cream is melting in the back, so I just go inside and figure I’ll learn my fate later.

Go out today and think I’ve found the culprit. Underneath there’s a plastic junction where the hoses meet. 2 small and one larger. One small one goes to the coolant reservoir and the other the heater I believe. The plastic junction where the hose I believe goes to the heater connects looks cracked at the base of the neck (photo hopefully included).

Anyone ever experienced this? Going to buy the hose kit and replace them, unless someone knows where I can buy just that junction piece? Is there anything that would have caused this outside of 20 year old plastic?

Thanks for any advice.

 

Pretty sure that's called the Jarvic Heart Union, not to be confused with the Jarvic Heart Thermostat, but all this 20yo plastic is bound to fail sooner rather than later. I don't think you're the only one to have this happen.

 

Yep, I've had this fail. Just buy the whole hose assembly that comes with that junction already in it.

My *strong* advice is to get Genuine LR hoses... they last longer, hose clamps are better and pre-fitted on, the hose routing and fitment is perfect, etc etc etc. Is this the one?
https://www.roverparts.com/belts-hos...es/PEH000080G/

BTW be careful that after you replace this, you don't have the hose rubbing on one of the pulleys / serpentine belt. Been there done that and ruined a new hose in a few days when I was younger.

 

I just bought the lower hose assembly but went cheap off parts geek. Seems easy enough a fix and not even sure if I’ll need to remove the fan for the lowers?

Never been so pumped to find a cracked part before. The way the coolant was dumping I assumed the worst

 

If that cracked everything else that is older than 10 years old is just as bad. Radiator, tank, hoses, tee, thermostat, all of it. Replace it all or start running your cap one full turn loose from full tight (will not build pressure and crack that way). Great time to do an inline thermostat mod while all the coolant is out. Check the sticky at the top and/or this blog post: https://extinctmotorsports.com/the-e...ry-thermostat/

 

I have an extra one of the aluminum versions that I'll part ways with for cheap if you want: https://carrs4x4.com/products/land-r...be-by-carrs4x4

 

install this and then you have one less plastic piece to worry about.

oh, yeah. also do the Inline Thermostat Mod.



Edit: ninja'ed by Brandon318

 

You should do this!! And it you don't say so and I will.

 

Happened to me - the plastic crap loves to fail after years of heat cycles. Replace every piece of the cooling system to ensure it doesn't happen again any time soon.