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Old 01-23-2011
Thread Starter
Join Date: Nov 2010
Location: Houston, Texas
Posts: 3
possible overheating and low coolant levels


Driving home Friday night I noticed the tempurature gauge started to climb to H, after idling for a few minutes I saw some steam coming out from under the hood. When I got home I popped the hood and I could hear a hissing sound coming from the radiator cap.
Saturday morning I refilled the radiator with a 50/50 mix, let the truck run for a while, and put on a new radiator cap. While driving Saturday afternoon and evening, I noticed the temp gauge start to creep towards H, remaining consistently at the 3/4 level. This morning I checked the radiator and the coolant level is down again. But I can't find any leaks.

Here are the vitals:
1996 Ford Ranger 4 cyl 2.3
Water pump replaced in Feb 2009.
Fan facing the engine is working
Barf bag level is consistent at cold fill.
cap replaced yesterday.

thanks for your help.
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Old 01-23-2011
Join Date: Mar 2007
Location: Upstate,NY
Posts: 2,598
Check for a blockage in the hose from the rad cap to the reservoir.
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Old 01-23-2011
Thread Starter
Join Date: Nov 2010
Location: Houston, Texas
Posts: 3
I just checked this hose and there is no blockage.
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Old 01-23-2011
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Join Date: Sep 2008
Location: athens, Al
Posts: 2,245
sounds like a sticking thermostat or leakin heater core...if its losing coolant there has to be a leak somewhere...put a piece of cardboard under it...if its leaking it can help locate leak.
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