i have a 2002 X-Type 2.5 Sport with a suspect water leak i think it might be i had a new water pump fitted and iv found out they are self bleeding leaving me wiht no water in the header tank. i tried to remove the cap and its pulled in two parts leaving the bottom bit tight in the neck. are all x types the same cap

 

Steve,

I've moved your question from General Tech Help to X-Type forum. This is the place to post technical questions about your model.

Graham

 

There is only one part number listed for the X-Types irrespective of model years.

Pressure Cap
1.0 Bar MJA4440BA

My x-type cap doesn't look any different than the ones on my XJ8 and XK8. I will have to check part numbers (inquiring minds want to know).

 

steveperry, if you are loosing coolant, this normally happens in 1 of 3 spots. The most obvious one being the water pump itself. If you open the bonnet/hood and look behind the battery box, you will see the top of the transmission. Do you see coolant pooling there? If yes, then it is your water pump that is leaking.

Next, look straight back from the battery box and find the overflow bottle. You will find 2 nipples on the back side of the overflow bottle. Specifically, you want to pay attention to the one on the left side of the bottle (nearest the engine). If you remove the hose from that nipple, did any part of the nipple remain in the tube and/or, do you see a white line in the nipple itself. This nipple is known for developing a crack in it (especially if the pinch clamp wings are left pointing straight up).

Lastly, fill the overflow bottle and take the car for a drive (10 miles/20 KM). Stop the car and let it idle for a minute or two. Now, look under the car across the whole area by the firewall (between the front tires). Do you see any pooling coolant? Most likely it will either be near the center of the vehicle (but you should also have a sweet smelling heater on the inside of the car) or near your front passenger wheel (since you car is RHD, driver's side front wheel if LHD). This would be a sign that your overflow bottle has developed a crack in the underside and it only leaks once the system gets up in pressure.

If you need more info, let me know.

 

thanks for the information il do the checks
but why is the cap so tight it pulls in two ? do u have to replace these

 

after three days the water level is ok , but i cannot get the bottom half of the radiator cap off. its stuck tight in the neck of the water tank.it has pulled into two bits

 

i live in sheffield england , i we have lots of scrap yards with jaguars in them. i found a new scrap yard in rotherham which is the next city and he has 4 x types in his yard,

 

Buy them all, you'll need the parts...J/K...

 

I had the same thing happen with my radiator cap. I just took a large pair of channel locks (pliers) and carefully grabbed hold of the lip of the half that remained stuck in the recovery tank, then turned it counterclockwise while pulling up at the same time. It took a little effort but I finally got it out. I just bought a new radiator cap and all is well.

 

cheers foxbottom
was your cap really stiff to pull out iv had two now and both been the same . the water pump i had fitted looks like its settled down and found its own level. i been told they are self bleeding i just need to try to get the rest of the cap off and try to top up level. good news is i have got rid of the stupid space saver spare wheel and got a proper size alloy, from one of my many x type scrap yards