Question about 1999 Ford Ranger SuperCab
Do not take out your themostat.
You need to Burp the air bubble trapped in your engine. You need to park the truck uphill on ramps and leave the radiator cap loose or put a U clip under the cap spring to keep it unseated.
Start engine and let it run until the thermostat opens and the upper hose is hot. Let it cool down and keep filling it as it cools. Repeat 3 times.
Then once more but tighten cap for the cool down and make sure overflow reservoir is kept to the full mark.
If that doesn't work, have a shop perfrom "Evac/Fill" to clear the air bubble.
Let us know.
Posted on Sep 09, 2010
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Posted on Jan 02, 2017
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