84 Ranger 6cyl cooling system troubles

TONES1628

MEMBER
1984 ALL OTHER MAKES ALL OTHER MODELS

Ranger was not building any temperature so I replaced temp sensor which did not help then I replaced the thermostat. Now I am building temp but it runs all the way up to the high end of normal and never seems to open the thermostat.

Any help would be greatly appriciated.

5 Replies

CHEVY350GUY

MECHANIC
109 POSTS

When you replaced the thermostate did you flush the system clean?

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Thursday, February 2nd, 2006 AT 4:38 PM

TONES1628

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Yes the system was flushed

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Thursday, February 2nd, 2006 AT 5:12 PM

CHEVY350GUY

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109 POSTS

It sounds like you have a faulty thermostat. It is probably worth it to put another one in because its temperature controlled, and if it is getting that hot, the thermostat has to be bad.

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Thursday, February 2nd, 2006 AT 5:47 PM

TONES1628

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Was leaning that way just pulled it out and put it in an old pot with water and a digital thermometer and watch to see what temp it opened. Temp was right 199 deg F which is what the manual called for.

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Thursday, February 2nd, 2006 AT 5:57 PM

CHEVY350GUY

MECHANIC
109 POSTS

The only other thing I can think of is the water pump is worn out and not circulating properly. Try this grab the pump pully and shake it. It should not move.