Older Jaguar XKs are notorious for overheating when they get stuck in lengthy stop-and-go traffic jams.. Here is a list of some things you can do to alleviate the problem:
  1. Run a strong vacuum across the fins of the radiator, front and back. Often there is an accumulation of debris and dead insects which blocks the airflow through the radiator.
  2. If you are driving and get stuck in a traffic jam, open all the windows (or go topless) and run the interior heater and fan motor on high. It might feel uncomfortable but the engine temperature will slowly drop by 5 to 10 degrees.
  3. For XK 120s, 140s, 150s, MkII, Mk V, Mk VII, Mk VIII, Mk IX and Mk X consider installing an auxiliary electric fan. I have added an electric fan to Witch Bitch and that fan has been a blessing in stop-and-go traffic.
  4. Strongly recommended is that at some point in time you remove the radiator from your Jag and send it to a specialized Radiator Shop for steaming, cleaning and a new re-core. This makes a huge difference. Your Jag will love you for it.
  5. For the fun of it, check out the video below on a very innovative solution to a not so common Jaguar overheating problem.

Two Hot Cats