Thank you Mike for taking the time to comment. My local Jag garage probably consider this job small and unimportant - they always seem very very busy when I try to talk to them. They did buy the LH drive tank (wrong one) and seeeeeem (?) to behave as though they have done enough. On VIN numbers.... I have found SAJAD02E8YFL45594 which is described as the chasis number on a service bill. Is this the VIN number do you think ? It is also shown on the nearside door pillar and on the dashboard showing through the windscreen. If it is how do I use it to track down the right coolant tank. Thanks again for your time.