I just get done with one car (XK8 TB) and now on to the S-Type. If you think one Jag is bad try dealing with two. One thing for sure I do not need to break anything!

 

Just remember........

Now-a-days you could/would be going through this with ANY car, not just Jaguars.

Geez, that should open the floodgates!

Cheers,

 

^ no doubt, i have check engine lights reoccuring on both the jag and nissan right now. but neither are causing issue, just I hate seeing the light

 

I know, I know! Can a guy whine just a little?

 

i have the same problem, when driving slow or around city, i get no heat, but when i'm on the highway the heat works very well.

 

Can't help you without year, model etc. Come on folks, think!

Cheers,

 

Well those who suggested the low collant were correct. I had the oil changed yesterday and topped up the coolant, and this morning the heat is working correctly. So I guess it means I'm now a member of the busted overflow tank club. When it gets light out, I'll take a peak under the hood and see if I can find where it's leaking.

 

Actually seeing the fractures while the tank is in the car is a real challenge. One thing you can do is look at the bottom of the car right behind the LF wheel, maybe with a mirror. See if you see any pinkish staining, that is a good telltale coolant has been trailing down there from the tank.

Cheers,

 

11-12 yrs old. Sounds fair. Something's gonna go by that age.

Gus - easy fix: sell your old cars & buy new ones

(kinda expensive but hey)

 

John, if you buy Gus one........would you buy me one, too???

 

LOL, Last time I suggested the obvious and checking the fluid levels I was blasted with "I'm not an Idiot, I check that already" So I started assuming people at least check the easy stuff like fluid levels before reaching out for help. either way you lose I guess

 

Heck if I could afford a 2nd car I'd have a winter beater for myself!

As it is, I walk / use trains

 

I am just a poor man.

 

Posted on other site as well

Gus,

I found this info.
Heater core
The heater core consists of fins and tubes arranged to extract heat from the engine coolant and transfer it to the air passing through the heater core. The heater core is separated into two sections. Air passing through one section is directed to the driver side of the vehicle, while air passing through the other section is directed to the passenger side of the vehicle. The heater core has separate inlet ports with a common outlet port.
Dual coolant control valve
The dual coolant valve regulates the flow of engine coolant to each half of the heater core. Two electric solenoids, Which are individually actuated by the heater control module, are the control elements. The valve contains three ports: inlet port - coolant from the engine outlet port - coolant to driver side of heater core outlet port - coolant to passenger side of heater core
Auxiliary coolant flow pump
Vehicles fitted with 4.2L engine
The auxiliary coolant flow pump is electrically driven and provides increased coolant flow during low engine speed operation. The pump is also used to circulate coolant after the engine is turned off under certain conditions.

So it could be a number of things I seem to remember that you have checked the DCCV, if not unplug it should default to heat, then check that the electrical soleniods operate individually, or the heater matrix, PIA, so my first choice would be to change the DCCV for a known good one

 

Sorry, mine is a 2001 Jaguar S-type 3.0

 

Then you are most likely in the same boat with javenlevi, go through the posts right after your first one. They pretty well cover what to look for.

Good luck!

 

I received the DCCV last night got up thinking I was going to change it in the morning but when I got up I was sick as a dog. I will deal with it on Monday. Thanks for all the help and I will give you an update when I start on it.
To everyone have a great Christmas!

 

Merry Christmas, Gus; you take care of yourself! We'll be here if you need us.

Cheers,

 

Have a good one GUS

 

Thanks, i added anti-freeze n the heater worked normal, but a taxi collided with me when i was going back home from autozone