Jaguar engine stall and coolant overflow?

I bought a 98 Jaguar xj8 today and the coolant over flowed three times but the temp. gage didn't raise to the hot level, also I was driving on the freeway around 65 mph and the engine started loosing power and after rolling for a minute the engine stalled. What's the problem and is it major?|||Check your radiator if its clog. The water might not circulating properly. Also check your water and coolant level. its should be in the proper level. You can remove air in your radiator by removing the cap while in idle for about 3 to 5 minutes then putting the cap back. In this way you are removing air causing to much pressure and overheating. Hope this helps!|||Sounds like the seller may have been aware of the overheating problem, as this same occurrence just happen to some friends. Prior to your driving off in the car did you inspect the engine compartment for possible signs of over heating/ Like stains around the reservoir,etc. Also check the temp Gage connection it may be unplugged. Next will be the thermostat and water pump. As found with my friends vehicle the oil was clear, but an oil change before the sale would make it look good. End of story before we got the vehicle home the engine overheated three times and blew the head gaskets to the tune of 1k and the light never came on.|||It could be as simple as an overfilled coolant reservoir but from what you say it sounds like a blown head gasket. This pushes the compressed fuel and air mixture out of the combustion chamber into the cooling system causing it to push coolant out of the radiator/reservoir. Yes this is a major problem.|||i would say it is a blown head gasket or a cracked head.


The compression pressure escapes in to the coolant.


idle engine with radiator cap off and watch for bubbles.


if there is bubbles in the radiator its a head gasket.


(don't confuse with air in the coolant from just filling the radiator)|||Where did it overflow from? There could be air in the cooling system. When its cold, take the radiator cap off and run the engine until the coolant gets to the top of the spout and then put the cap back on. The engine just could be bad, did you check it out before you bought it?|||maybe you overfill the coolant but it nothing to do w/stall also maybe you meter is not working but I think it is engine problem check oil check cables wires and sparkplug