The 1988 XJS I have, after cleaning the system and adding the coolant, there started a leak, I know where the leak is but have no idea what the part is called. Just under the PCV valve canister container there is a short hose from the bleed system to that part. Is there someone who could let me know what it is, and, if it is a single part that can be replaced.

Thank you,
Sundance-Kid

 

I'm understanding you to be talking about the LH side,,, more towards the front of the engine? Again, if I have ya right, there is a sensor close by with a plastic clip on 2 prong wire? If so, it's a thermostat housing. In that ball-ish shaped area at the front of the coolant rails (bolted with 3 bolts - see pic) is where 1 of 2 thermostats lives... Yours is the 5.3 v12, yes?

It might be hard to envision this IN the car, but is this what you mean?

 

A couple illustrations.

Anything look familiar?

https://parts.jaguarlandroverclassic.../brand/jaguar/

https://parts.jaguarlandroverclassic.../brand/jaguar/

Cheers
DD

 

That little tube in the alloy blew out on mine and lost all the water on the m27.motorway. So had to J. b. weld it back in. If I ever remove fthat part I will see if it can be bsp tapped and fit a screw in adaptor.

 

JB Weld will outlast the car and you, worry no more.

 

I hope so, but I wonder how much jb stayed on the tube as I knocked it into a very tight hole. Although I did knock it in a tiny bit further than it had been.

 

Same as me a looooong time ago, they are ALL still intact, so now a forgotten item. It dont take much JB to stick it 100%, most people over apply the stuff, me included, in the early days.

 

I had the same happen and executed the same fix several years ago. Still holding !

It's amazing what a massive shower of hot coolant will do to a freshly detailed engine bay.

Cheers
DD

 

What happened to the Sundance Kid????

Sorry,,, I've been wanting to say that sentence all my life, and never knew it, til now, lol

 

The hose connection that is leaking is the one that is about 2 inches long and about 1 1/2 internal diameter, it is part of the metal tube that connects the 2 sixes to each other and the cap at center.

 

Item #1 in this illustration?


https://parts.jaguarlandroverclassic.../brand/jaguar/

Part EAC4191. Discontinued but there might still be some floating around. Or find a good used one. Try EverydayXj.com

Yours might be repairable if not too badly rusted

The hoses are just straight sections of ordinary coolant hose. Your local auto parts store can fix you up

Cheers
DD

 

Hi DD.
That part number is for that whole connector, the one I am after is where that thicker tube just left of the filler cap underneath where it connects to the engine.
Thanks

 

This?

https://www.autohausaz.com/pn/632_20...gaArZREALw_wcB

 

It is what the bottom of that hose connects to on the front of the engine.

 

I'm not quite sure I understand what "bottom of that hose" means...

That hose connects on one end to the unit I sent a picture of further back in this thread - to the housing for the thermostat (pic in post 2 or 3 I think). The other end connects to a pipe (similar to the one you described) that goes across the front of the engine that has a filler CAP on a section that points straight up towards the hood. There are two short hoses like the one in the link above, on either end of that coolant cross pipe. Two hoses like this/that on either end. And yes, they will leak.

I know it's not easy BUT it will pay off to slow down a bit to really try to describe what's your seeing as best ya can. Sometimes, on this end, it can be tough to interpret a quickly written set of ideas. Jus say'n

Can you post a photo of what your looking at?

 

This is the "crossover pipe"... Usually black. Across the front of the engine.

That small hose connects on either end, left and right.

 

The hose on the UNDERSIDE of the cross pipe connects to the Water Pump, on the suction side.

If that connector metal section is corroded/leaking, you need either a cross pipe Assembly, a water pump, or the hose that joins the 2 items, about 1 1/2" diameter., there are no other items in that area.