First major issue I have had with this car and perhaps not an issue at all. I recently noticed the cooling fans coming on more often. The car has started to run hot. I have checked the coolant..it is topped of fine..did have the coolant low reminder come on prior to topping off. I drive about 15 minutes and then the fan kicks on...drive longer and notice the temp going higher...when I park the car...fan comes on about 5 minutes...where would one begin this prognosis...Thanks in advance for your time. CHEERS Scottie

 

Replace the thermostat, and if the low light warning comes on again and the coolant is in fact low, spend alot of time looking for leaks. There are many possible sources for leaks, none are particularly common...but now that you know the system is full, that has no bearing on the engine temp. The thermostat does.

 

Has anyone changed the thermostat in their Jaguar??? Is it any easy task or very involved process. Thanks

 

I haven't done it myself, but lots of others have. I don't recall seeing any step-by-step instructions posted in either the XJ, XK or Stype sections.

If you don't have one yet, either buy yourself a JTIS CD (via ebay for $6), or download one and install it on your PC. Works great for about 90% of DIY projects we undertake. Thermostat couldn't be that difficult.

 

the thermostat is a very very easy replacement. yes i know, it's unusual for Jaguar.

top front center of the motor is the radiator fill edifice and the home of the thermostat. it's black and in between the valve covers, kinda hard to miss. on the top it has a rubber cap with an allen wrench fitting (you can get it off with a wrench). also, two hoses connect to it. you're concerned with the bottom hose.

behind the bottom hose is a triangular fitting held together by 3 10mm or 8mm bolts. the thermostat is in that triangular fitting housing. procedure, the simplified version -

1) locate the housing for the thermostat

2) remove the bottom hose (fluid will drain out if the level is normal, so drain a little or make a mess. up to you)

3) remove the bolts holding the housing together

4) remove thermostat and take note of which side faces what direction

5) put in new thermostat with same sides facing the same way the one you took out did.

6) put everything back together.

there is a rubber gasket in the thermostat housing but i didn't need to change out when i did mine.

 

Ye ask for step by step, Ye get step by step. Thanks Namor.

 

WOW...........I dare say I am pleasantly suprised...Thanks much Namor...I truly appreciate everyones input and time spent addressing my question...looks like I will be busy tomorrow AM...I am real happy to have found you all! CHEERS!

 

should be easy. also note you can take off any of the other coolant hoses and connections that are in the way (top tube). they're any easy removal and installation. you don't have to take them off, but if you need more working room you may want to.

let us know how everything goes.

 

THANK YOU!!! THANK YOU!!! THANK YOU!!! In less than 24 hours time ...my beloved Jaguar is behaving like his old self! Namour...you are much appreciated in my eyes....Thank you! I appreciate the detailed steps...I didnt have to take any other hoses off..it took me maybe an hours time...if that...and all is well and it was a rather smooth process. I appreciate everyones input...I am one happy Jaguar owner! CHEERS