I have noticed over the past few months that I am slowly losing coolant but I can't see any hose/joint leaks. The last time I explained to the garage they did a blocked test and said it was ok. They topped it up but I have just checked and it is now near the bottom of the reservoir. Ok it's 7 weeks since I had it topped up and block tested so it's not leaking a lot - the car has never overheated - any ideas where it's getting out?

 

Royston,

I've moved your question from Jaguar Forums Advice / Feedback & Suggestion Center to X-Type forum. The Advice / Feedback & Suggestion Center is for posts about the forum and not for technical questions.

Members here with the same model will be able to help.

Graham

 

Thanks for moving it Graham.

 

Get a telescoping mirror and look at the waterpump gasket to hosing. Do a sniff test thru the vents to the heater/AC vents. Under car check drains to the A/C heater box. One or 2 rubber hoses or valves on one or both sides of transmission. Check for antifreeze. Tighten all hose clamps, you will see antifreeze/calcium build up if leaking.

 

Royston, I just fixed a leak similar to this on my car this weekend. I am not sure if my leak was coming from the mating surface of where the thermostat seats to the plastic tee, where the tee connects to the block (this is what I was thinking was the most likely spot based on where the coolant was before I started tearing into things), or if it was coming from the joint on the tee (where the 2 plastic pieces join).

I tore into my car and spent most of the day getting it all apart, putting in new hoses, and putting it all back together. A lot of the hoses I simply found a suitable hose at the local parts store. Granted, the one hose that goes from the tee to the front side of the engine I could not find a suitable replacement (makes a step change in hose size on each end) and I could not find a replacement for the S hose that goes between the tee for the heater core and the overflow bottle. But, both of these hoses seemed to be in pretty good shape on my car, so I re-used them. So far the leakage seems to have stopped.

A very slow leak like you are describing is normally coming from the shaft seal on the water pump. But, it may be possible that one of your hoses has developed a small leak too. So, a little bit of looking will be needed.