40C outside temps are getting up there Mark. Weve been getting around 34-36C. You Jeep still seems to be getting pretty warm.
At the moment, even at 36C outside, my XJ is not getting over half way. Regardless if im sitting on 100kph, or idling in traffic.
I think you have done nearly everything. Only thing i can think off is give it a home pressure test.
Ive done mine a few times and found some leaks, which will reduce the pressure and increase the temps.
Let me know if you want to check that, and ill show you a home made way of doing it.
Cheers,
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'95 XJ I6 4.0 AW4 NP242,
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