Jaguar
XK8
12

Overheated Engine Due to Stuck Thermostat on Jaguar XK8

Problem Description and Possible Solution

The thermostat may stick partially closed resulting in an engine to overheating condition. Replacement of the stuck thermostat should correct this problem.

Problem Data
RepairPal Verified
Average mileage: 61,200 (41,000–87,000)
6 model years affected: 1997, 1998, 1999, 2000, more2001, 2003
12 people reported this problem
Comments
Viewing 1 - 5 of 5 comments
Engine gets very quickly to operating temperature and after driving 10 miles the coolant is pushed out the overflow and need to top up expansion tank when stopped although does not empty the system . The top and bottom radiator hoses significantly different in their in temperature and suspect thermostat is sticking half open and have ordered one .The engine didn't overheat on a100 mile drive but lost a[pint of coolant .My car 4 years ago had the new aluminum thermostat housing fitted but looks like that one is playing so will try and do it myself .How should i bleed the system . Should i remove the top cap with the female socket drive in it ? Please to see it is a common problem
Regards
Nigel
I noticed that my temp guage was heading into the red zone going up a steep hill. I was able to get the car to a Mc Donalds and had it towed to my Jag dealer. The problem was a stuck, partialley closed, theromstat which they replaced. I also had them replace the water pump with the new metal style. I am now seeing the ABS error light come on intermittently. Not sure what to do about that. The dealer checked the car and cleaned the ABS sensor plug contacts on the right rear wheel, which seemed to cure the problem for a few months,but the problem is back.
Stuck thermostat causing fluctuating high water temps and High speed cooling Fan Operation.
Mine was stuck open and I got a low engine temperature lite that causes the engine to go into low performance mode
My car was heating up going uphill and fans would run non-stop. I assumed my thermostat was stuck so i purchased a new one. ($12) Then when trying to install it i noticed the housing and the tower it bolts to are plastic. I was unable to remove the 3bolts to remove the housing to get to the thermostat. They would just keep spinning and spinning. So in the end i purchased the entire tower which is is aluminum not plastic.($89) Then i was able to replace the thermostat and that fixed the problem.