1991 mustang still running warm - MustangForums.com



5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

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Old 03-01-2014, 11:10 PM   #1
bigal8thomas
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Default 1991 mustang still running warm

1991 5.0 new radiator new fan and clutch still running too warm for me just a little above half way. it seems to run warmer at night. going to try to burp it tomorrow water pump new also. not sure whats going on any feedback will help
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Old 03-02-2014, 01:23 AM   #2
tinman
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Is heater core clogged?
I'd check that first.......
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Old 03-02-2014, 05:52 AM   #3
dawson1112
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That's where my 90 runs is just a touch above half way on the gauge, perfectly normal.
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Old 03-02-2014, 12:32 PM   #4
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After I replaced my 180* thermostat back to a 190* that is how mine runs as well. Guess it is normal but it kinda bothers me too.
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Old 03-02-2014, 01:12 PM   #5
mjr46
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stop going by the factory gauge, go buy a real mech gauge so you can know what temp the engine runs at and not just a generic "runs at half gauge"
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Old 03-03-2014, 02:04 AM   #6
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^^^^^^^^^^^^^^^^^^^^^^THIS^^^^^^^^^^^^^^^^^^^^^
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Old 03-03-2014, 10:25 AM   #7
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Quote:
Originally Posted by tinman View Post
^^^^^^^^^^^^^^^^^^^^^^THIS^^^^^^^^^^^^^^^^^^^^^
Heater core not clogged I guess iwiil try aftermaket gauges.
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Old 03-03-2014, 02:01 PM   #8
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Quote:
Originally Posted by bigal8thomas View Post
Heater core not clogged I guess iwiil try aftermaket gauges.
reason I mention this is more often than not the factory gauge is less than accurate expecially if the IC voltage reg is bad
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