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Old July 26th, 2019, 21:32
Patrick S.'s Avatar
Patrick S. Patrick S. is offline
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Join Date: Jun 2005
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Posts: 53
Re: having overheating issues. 94

Not normal for it to be overheating at highway speeds. My XJ only starts to get hot on uphill climbs but that's fairly normal as it cools back down rapidly.

That's a lot of coolant loss.

Unless you have a easier leak you haven't found such as a hose, defective water pump (underside from weep hole), freeze plug, thermostat housing (underside), heater core (coolant smell inside cabin), etc it sure sounds like it could be cylinder head related.

Have a good look around after 10 min of shutting down. If you can't find any leaks you have to do some further testing with the correct tools.
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