Join Date: Aug 2009
Location: Somewhere Between Good and Bad
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As for the 186*, that should be higher. Your T-stat could be on it's way out.
So, for piece of mind, change it.
Was thinking the exact same thing. Mine did that previously, and since I installed a new thermostat the coolant never drops below 192 once the engine is warm.
2006 CC SB 4x4 6.0L
KC Stage 1.5
BPD 6 Phase 53v FICM, EGR, HD Oil Cooler, Bypass Oil Filter & Water Pump
ARP Studs w/ OEM Gaskets
DC Power 190a upper; DB Electric 200a lower alternator
295/65/20 Toyo MTs
PMF 3 Link
7,500LB Tuff Trucks Leveling Coils
Icon 2.5 piggyback CDC shocks
Dynatrac Free Spin Kit with Dynaloc Hubs
EDGE CTS Monitor w/ EGT, pressure, and temp sensors
Blue FPR Spring Kit
Twin F450 Auxiliary Springs
Banks Monster Exhaust
Truetrac rear/E locker Front with 4.11s