03 Navigator Cold Weather Operation
Just got a 03 Navigator (project) with 5.4 4 valve engine with 116K that suspension and some options were inop. After shop diagnosed and replaced fuse box, air compressor relay and door switch the air...
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I would start with the thermostat, granted aluminum engines do not hold heat as well, they do not operate like you are describing. The coolant should be flushed; I flush out our vehicles every 100,000 miles, I am not a believer in this so called "lifetime antifreeze." We had a Mazda 626 that we gave to our oldest grandson, it is closing in on 300,000 miles and I will be changing the antifreeze in it, giving it a tuneup, and having the timing belt changed. Regular maintenance is important to keeping a vehicle running properly.
