Hey all!
I picked up my "new" 2014 XJL last week and am itching to drive her but out of an abundance of caution I did a pressure test on the coolant system and found a leak on the thermostat housing. I ordered the upgrade V3 kit from Euro-Amp as I intend on replacing all the cooling system with the metal design at some point but just want to be able to drive her until I get time to devote to the job.

I Went through and installed the new thermostat in the kit and then realized my XJ had the older thermostat housing without the thermal element / sensor... the unit is otherwise identical..

Does anyone know if I can run this or do I need to buy another thermostat without the sensor? Appreciate your help!
Thanks
James

 

If your car does not have the additional sensor then you can install what you have and just leave the wire dangling.
Just so everyone knows the 3.0L thermostat housing came two ways. With the sensor and without. Looks like the 5.0L came without one. Both engines use the same thermostat housing.
.
.
.

 

Awesome! That's what I was hoping... really didn't want to do that again so soon!

 

I think your good to go BUT post some pictures of your car and what your doing? We love to see pictures!
You were wise to just go a head and replace the plastic stuff with metal too. This is the main weakness in these engines.
Did you do the rear water manifold as well?
.
.
.

 

I heard back from Euro-Amp and he said the updated housing with sensor would not function as intended on my Jag.. so I bought a sensorless one just to be safe.

My 2014 has the newer Cooling pipes, so not what came with it.. no mention of the job in the carfax, however in 2021 the water pump was replaced by Jaguar, wondering if they did the newer pipes at the same time?

I have used an inspection cam to check the rear for leaks as well as the oil cooler and updated pipes, all seem in good shape although the rear crossover pipe is hard to see. While I will be doing the entire job of replacing all the pipes with the metal ones at some point, I was hoping on holding off for a few weeks and just doing pressure tests once a month... Of course people have horror stories of pipes going and bricking their engine but I wonder how common that is, or if the majority of the time it's a slower leak that goes unchecked until catastrophic failure?

I have the metal crossover for the rear, apparently those tend to leak from the sensor, seems O-Rings can get mashed up when the sensor is installed if theres burs that go unchecked.. only way I can think of ruling that out is to remove the sensor, but doing so will also introduce more chance of reducing effectiveness on the seal...

 

Thermostat with sensor wire zip tied up.