Question about 1999 Ford Ranger SuperCab

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I have a 99 ford ranger 4x4 and its overheating and ive replaced the rad,waterpump, thermo, and hoses and its still overheating but not all the time its random

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Hello! The most important question is what type of coolant are you using? There is a Technical Service Bulletin (TSB) #01-23-6...It relates to the only coolant that can be used in your Ford...Do not use coolant made with Propylene Glycol...It will damage the cooling system...Only use Ethlene Glycol based coolant...Since you have replaced all major components and still have a problem...I would suggest back flushing the engine block...A back flushing kit can be purchased at most auto part stores...The random nature of the overheating may also be associated with electrolysis...Using a digital volt meter set to read less than 1 volt...Put positive probe into recovery tank and negative probe to ground...Start engine...Any reading over .3 volts is indication of a problem...Electrolysis turns coolant to goop and will not circulate...Send results...Guru...Saailer

Posted on Aug 27, 2010


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Posted on Jan 02, 2017


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