Check the thermostat. It could be stuck in the open position resulting in coolant taking a longer time to heat up.
Nov 13, 2010 at 6:34 AM
WRENCHTECH
✓Experienced Mechanic
20,761 POSTS
You can use a laser thermometer to determine if the gauge is accurate. If it is, then it may need a new thermostat.
Nov 13, 2010 at 6:35 AM
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