Question about 1999 Ford Ranger SuperCab
99 3 liter Ford Ranger pickup truck keeps overheating. Have changed the radiator, thermostat, water pump & clutch fan, radiator cap, belts. Continues to overheat with the heat gauge going up and blowing all fluids from radiator then return to normal.
I have had this happen with my ranger. Changed everything I could to try to fix the over heating. It turned out that I had a small leak in my head gasket and it was allowing exsaust gas to go into the cooling system witch was over pressurizing it. Also the air from the exsaust will heat up much faster than liquid making your thermostat to read hot and will not be able to blow hot air in the cab because there is no liquid going to the heater core. This happened to me when my blet came off and I tryed to make it home. If you had it over heat for a long peirod of time it may have ripped the head gasket.
Posted on Feb 21, 2009
You did let it run quite a while with heater on full while refilling the coolant to make sure all air bled out right? Well try it again with cap off, and rev the engine slightly once in a while for a few seconds, then let it idle again. Keep doing this as long as your gauge stays in normal range, Until you can see the flow increase in the rad, about 2 or 3 times at least. You'll see it flow faster when the thermostat opens. while watching it, keep an eye for bigger size bubbles, which indicates air obviously, but they should disappear or at least get very minimal after a while. Continuous larger bubbles, may indicate a bad head gasket, or cracked/warped head, or both. Let's not go there until we try the other though. Feel your rad hoses too, (squeeze them) especially your lower one, as it could be soft & spongy, and collapsing during driving & restricting the flow to the engine. If it feels weak at all, after all you've done, I'd do them too just to be sure, if they feel weak at all. Keep us posted
Posted on Dec 21, 2008
Waterpump bad blades gone
Posted on Mar 23, 2009
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Posted on Jan 02, 2017
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