Water pumps sometimes make a growling sound when going bad but not always. A very remote posibility but a 2 second check is the fan belt (just in case). If there is no water flow, The only things I can think of are: No coolant, stuck thermostat, plugged radiator, bad water pump and possibly some electronics on late models where the temp is maintained via computer. Also, the temp gauge could be giving false readings but don't count on it. Check for hose pressure on the intake and outflow of the radiator. Of course do not run the motor if it is above temp since engine damage may result.
An infrared Temp. gun is handy to diagnose cooling system problems like that. Hit the top hose and know plus-or-minus a degree what the temp really is....also hit the radiator core and find plugged areas not dissipating heat.
'96 F-250 Reg. Cab 4X4 5-sp POWERSTROKE
298,500 mi & NO Problems, LUK Clutch
Could certainly be one of the things Roger said, another would be your fan clutch is not locking up. Also, if they sand or cinder your roads up there in winter, I've seen them so plugged with cinders it caused overheating. Also pull the cap and what few tubes you can see, make sure they're not plugged.
Heavy truck and diesel mechanic (thankfully retired after 30+ yrs)
'91 F-250 SC 4X4, 5spd. ATS Turbo, 3:55 diff.
The 1st thing I would do on a 91 van would be to pull the front grill assembly and power wash the condenser, and radiator. Years of build up seem to be common on older vehicles, then check what everone else has posted. Good luck
06 3500 QC/LB/SRW/4.10/48RE/5.9/ Inferno red pearl
04 Hitchhiker 34.5 RLTG, Kubota B7610
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