JoeyM
JoeyM GRM+ Memberand Mod Squad
2/25/14 8:18 a.m.

I have a coworker with truck problems who asked me if I have any ideas why his truck is running a bit hot. (I'm not sure why he asked me, considering that I throw my hands up and run away like a scared little girl when faced with engines or other parts that spin about and move.) Any advice you can offer would be helpful.

Vehicle: 1992 Ranger XLT, 4.0 L v6, 2WD
Symptom: Running on the high side of normal
Recent repair history: thermostat, thermostat housing, water pump, fan belt, fan clutch, idler pully, all new hoses

(....and yet, despite all this, it still is running on the high side of normal)

Grtechguy
Grtechguy UltimaDork
2/25/14 8:38 a.m.

two things that pop in my head.

improperly mixed coolant and/or an intake gasket leak.

edit: Too hot of thermostat installed?

mad_machine
mad_machine GRM+ Memberand MegaDork
2/25/14 8:56 a.m.

radiator missing a lot of fins or clogged?

JoeyM
JoeyM GRM+ Memberand Mod Squad
2/25/14 9:03 a.m.

The previous owner is supposed to have replaced the radiator about a year ago

jimbbski
jimbbski HalfDork
2/25/14 9:21 a.m.
JoeyM wrote: The previous owner is supposed to have replaced the radiator about a year ago

Does it look new? Check the timing as well.

Kenny_McCormic
Kenny_McCormic UberDork
2/25/14 10:39 a.m.

Put a real gauge on it.

N Sperlo
N Sperlo MegaDork
2/25/14 11:29 a.m.
JoeyM wrote: Symptom: Running on the high side of normal

Can that be defined?

Ranger50
Ranger50 PowerDork
2/25/14 1:06 p.m.

Infrared temp gun the radiator inlet and outlet plus across the core. Rebleed the air out of the system.

Does the heater work? Will it bring down the temp on the gauge?

yamaha
yamaha UltimaDork
2/25/14 2:05 p.m.
Kenny_McCormic wrote: Put a real gauge on it.

This right here, I've had a bunch of Fords of that era read all over the place on that "Normal" sweep......they all read a consistant 205-210* on an autometer gauge.

JoeyM
JoeyM GRM+ Memberand Mod Squad
2/25/14 2:06 p.m.

Thanks guys, very useful. I'll tell him to take a look at this thread, get a real temp reading, and try the heater.

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