Ford Ranger Forum - Forums for Ford Ranger enthusiasts!

Go Back   Ford Ranger Forum - Forums for Ford Ranger enthusiasts! > >
Forgot Password? Join Us!

Welcome to Ford Ranger Forum

Reply
 
Thread Tools Search this Thread

  #1  
Old 05-31-2010, 06:04 PM
Turtle Turtle is offline
Learning to use the forums
 
Join Date: Feb 2010
Posts: 10
Default thermostat

i was driving to the beach today and noticed my truck was running a little hot, but when i was driving at a steady speed it would cool down if i slowed down the temp needle would shoot up. im thinking it is the thermostat, am i right?
Reply With Quote
  #2  
Old 05-31-2010, 06:15 PM
modelageek modelageek is offline
Ford Ranger Driver
 
Join Date: Jan 2009
Posts: 6,257
Default Re: thermostat

Quote:
Originally Posted by Turtle View Post
i was driving to the beach today and noticed my truck was running a little hot, but when i was driving at a steady speed it would cool down if i slowed down the temp needle would shoot up. im thinking it is the thermostat, am i right?
it helps to have details about the truck, t-stat could be your issue..... or it could be low coolant level, bad radiator, bad waterpump.

look for leaks around the waterpump
__________________
2004 Ext Cab, 4WD, 4.0, Auto, 154k. (4.0 engine is out of a 2009 Ranger w/96k) ( as of 7/1/2017)

2004 Ranger, Ext Cab, 2WD, 3.0, 5 speed , 4WABS, crank windows, no cruise, Edge 116k.(6/5,2014) (SOLD).
1999 Ford Ranger, Reg Cab, 2.5, 5 speed, 2WD, no AC, 150k (SOLD).
Reply With Quote
  #3  
Old 05-31-2010, 06:21 PM
FireRanger FireRanger is offline
Blinded by the light
 
Join Date: Sep 2009
Posts: 7,674
Send a message via AIM to FireRanger
Default Re: thermostat

I don't think it's the thermostat. Symptoms are wrong. Sounds more like a [any other cooling system component]. Do the obvious things like coolant level and looking for leaks. Report results.
__________________
(Formerly)
FireRanger
2003 Edge 4.0 4wd

How to: Aux light wiring, relays, & fuses
Info: 300+ intake threads here on FRF
Info: HID Projectors
How To: NO HEAT Troubleshooting Guide
Reply With Quote
  #4  
Old 05-31-2010, 06:37 PM
Turtle Turtle is offline
Learning to use the forums
 
Join Date: Feb 2010
Posts: 10
Default Re: thermostat

no leaks of anysort, had it sitting out for about 2 hours, the overflow coolant is good and radiator is full as well
Reply With Quote
  #5  
Old 05-31-2010, 06:41 PM
timay4337 timay4337 is offline
Liking the Ford Ranger Forum
 
Join Date: Jan 2010
Posts: 26
Default Re: thermostat

it heats up more when you slow down because there is no air getting through the radiator.. check your fluid levels and whether it is clear
__________________

1997 2.5l
5 speed reg cab
2wd
short bed
green/white
3 in body lift 33' mudstar tires
Reply With Quote
  #6  
Old 05-31-2010, 06:46 PM
FireRanger FireRanger is offline
Blinded by the light
 
Join Date: Sep 2009
Posts: 7,674
Send a message via AIM to FireRanger
Default Re: thermostat

Quote:
Originally Posted by timay4337 View Post
it heats up more when you slow down because there is no air getting through the radiator.. check your fluid levels and whether it is clear
Uh, yeah there is. That big spinning thing on the front of the engine is not a decoration....


Anyway, back to the problem at hand: Two things are happening when you are moving that is different than sitting still. One, forced ram air going through the radiator. Two, water pump and fan spin faster. Since you're fluid level is fine, it is narrowed down to these things.

Now that I say that out loud to myself, I think you might have a fan clutch problem. The fan clutch heats up and spins faster. If the clutch is shot, the fan will not spin fast enough to do jack at idle. It will just free wheel. Once you're moving, you have ram air cooling. When the engine is hot, shut the truck off and see if you can spin the fan by hand. If it spins easily by hand, the clutch is toast.
__________________
(Formerly)
FireRanger
2003 Edge 4.0 4wd

How to: Aux light wiring, relays, & fuses
Info: 300+ intake threads here on FRF
Info: HID Projectors
How To: NO HEAT Troubleshooting Guide

Last edited by FireRanger; 05-31-2010 at 06:52 PM.
Reply With Quote
  #7  
Old 05-31-2010, 06:51 PM
Turtle Turtle is offline
Learning to use the forums
 
Join Date: Feb 2010
Posts: 10
Default Re: thermostat

i didnt wanna say anthing about that ^^^^ thanks for doing so hah. thanks man, lemme go check that out
Reply With Quote
  #8  
Old 05-31-2010, 07:02 PM
Turtle Turtle is offline
Learning to use the forums
 
Join Date: Feb 2010
Posts: 10
Default Re: thermostat

i was on the highway when i noticed all this so i was doing about 65-75 to keep it cool but once i got into the city and had to slow down the whole beach idea went to hell and i had to turn back home.
Reply With Quote
  #9  
Old 06-07-2010, 12:16 PM
timay4337 timay4337 is offline
Liking the Ford Ranger Forum
 
Join Date: Jan 2010
Posts: 26
Default Re: thermostat

Quote:
Originally Posted by FireRanger View Post
Uh, yeah there is. That big spinning thing on the front of the engine is not a decoration....


Anyway, back to the problem at hand: Two things are happening when you are moving that is different than sitting still. One, forced ram air going through the radiator. Two, water pump and fan spin faster. Since you're fluid level is fine, it is narrowed down to these things.

Now that I say that out loud to myself, I think you might have a fan clutch problem. The fan clutch heats up and spins faster. If the clutch is shot, the fan will not spin fast enough to do jack at idle. It will just free wheel. Once you're moving, you have ram air cooling. When the engine is hot, shut the truck off and see if you can spin the fan by hand. If it spins easily by hand, the clutch is toast.
oh is that what i meant
__________________

1997 2.5l
5 speed reg cab
2wd
short bed
green/white
3 in body lift 33' mudstar tires
Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Thermostat location Loggy 4-Cylinder Tech 21 04-17-2012 09:28 AM
thermostat question daniel.kezele 4.0 SOHC / 4.0 OHV Tech 1 04-20-2010 02:04 PM
Lol, where is my thermostat? rumpranger 4-Cylinder Tech 3 01-01-2010 08:38 PM
Thermostat Housing nickis General Ford Ranger Discussion 3 12-26-2009 01:03 PM
Thermostat Replacement greyghost How-To Submissions 1 10-13-2009 09:22 PM