Thermostat Myth - Page 2 - Ranger-Forums - The Ultimate Ford Ranger Resource


General Technical & Electrical General technical and electrical discussion for the Ford Ranger that does not fit in any other sub-forum.

Reply
 
LinkBack Thread Tools Search this Thread
  #26  
Old 08-12-2010
Level I Supporter
Thread Starter
 
Join Date: Aug 2006
Location: Durham, NC
Posts: 3,657
Quote:
Originally Posted by freddie View Post
How stupid is this thread? We have 2 grown men arguing over the operation of a thermostat, and one of them acting extremely... juvenile.

Move on and get over it.

Bob, Rich has already acknowledged that a thermostat needs to stay closed to keep the vehicle at optimum operating temp. What more do you want? He is absolutely correct. IF the thermostat was to stay open, or non-existant in the cooling system, the vehicle would likely never reach operating temp. What else are you trying to argue about? From the confrontational vibe of your posts ("Rich this, Rich that"), it seems you're just fishing for drama.

I like the photos you post Bob (or used to post, have not seen any recently but I have not been online much). Apparently you hold a grudge against Rich for whatever was argued about before. Maybe it's time to get over that, or keep it to yourself?
No, Rich thinks that once opened, the thermostat has to close, to allow the coolant sufficient time to cool in the radiator:

From his post (#7) in the referenced thread: "A colder stat will stay open longer and if the heat is great enough.. it won't close. Then what happens is the coolant doesn't stay in the rad long enough to cool down."



This goes totally against the working principle of the thermostat: CLOSE = HEAT, OPEN = COOL.

My photos are in the Photography forum on R-F
Reply With Quote
  #27  
Old 08-13-2010
zabeard's Avatar
who?
iTrader: (8)
 
Join Date: Nov 2004
Location: IN
Posts: 26,045
Bob I am not saying your theory isnt right but I have to believe Rich over you. I personally think that it was designed with both thoughts in mind. Otherwise the coolant temp would not be consistent.

Since owning a car with temp issues the amount of engineering that goes into this stuff is unreal. Just take a quick look at the 6.4L its not a simple task to evenly cool/heat that beast in every possible condition.

Also heater control valve? Where would I go about finding such a beast. So far I am pretty confident that a 2000 Lincoln navigator and a 2003 Ford Ranger do not have such, if it is its hidden inside the dash. Take a look at my recent project, I have completely dismantled both scenarios and currently hooking it all back up.
Reply With Quote
  #28  
Old 08-13-2010
Level I Supporter
Thread Starter
 
Join Date: Aug 2006
Location: Durham, NC
Posts: 3,657
Quote:
Originally Posted by zabeard View Post
Bob I am not saying your theory isnt right but I have to believe Rich over you. I personally think that it was designed with both thoughts in mind. Otherwise the coolant temp would not be consistent.

Since owning a car with temp issues the amount of engineering that goes into this stuff is unreal. Just take a quick look at the 6.4L its not a simple task to evenly cool/heat that beast in every possible condition.

Also heater control valve? Where would I go about finding such a beast. So far I am pretty confident that a 2000 Lincoln navigator and a 2003 Ford Ranger do not have such, if it is its hidden inside the dash. Take a look at my recent project, I have completely dismantled both scenarios and currently hooking it all back up.

Ok Zach, let me try and help you out a little. First Let's look at this statement made my Rich in this thread:

The stat needs to stay close to closed to keep the engine at the proper operating temp. (which is usually about 10-12F hotter than the stat is rated for)

If the engine is 10-12F hotter than the thermostat rating, how is the thermostat going to go "close to closed"? Once again, the principles Rich (and I guess you) are having a hard time with is a thermostat OPENS to COOL, and CLOSES TO HEAT. The thermostat going "close to closed"
for the coolant in the radiator to cool, doesn't follow these
basic thermostat principles.

Next, this statement:

I was not only a ME.. but a cooling engineer for ford for 6 yrs.

He wants you to believe he was a Ford cooling engineer for 6 years. In reality, he worked for a company that was a contractor for Ford that did testing.


For the heater control valve, it is located on one of the heater hoses on my 1999 FFV 3.0L. See red circle in
this photo:

Reply With Quote
  #29  
Old 08-13-2010
HAZZARDJOHN's Avatar
Member
 
Join Date: Dec 2005
Location: Wyoming MN
Posts: 2,400
Reply With Quote
  #30  
Old 08-13-2010
zabeard's Avatar
who?
iTrader: (8)
 
Join Date: Nov 2004
Location: IN
Posts: 26,045
4.0L and 5.4Ls do not have such heater control valve.

Bob, you know me im not really one to argue so ill end it with this.

I do understand your theory i just think there is more to it than open and closed as you mention.
Reply With Quote
  #31  
Old 08-13-2010
silverfox's Avatar
Member
 
Join Date: Jul 2008
Location: Taft, Ca
Posts: 1,040
i havnt read all the post in this thread im on a quick lunch break at the moment one thing i see that throws this experement off is there is no antifreeze in the system just straight coolant

coolant=water
antifreeze=chemicals that keeps the coolant from freezing in cold weather,rust inhibiters,lube for the waterpump

system will run colder with no antifreeze

thermostate is there for a reason in the right conditions it can/will overheat
Reply With Quote
  #32  
Old 08-13-2010
V8 Level II's Avatar
RF Veteran
iTrader: (4)
 
Join Date: Nov 2004
Location: Michigan
Posts: 7,833
Quote:
Originally Posted by zabeard View Post
Also heater control valve? Where would I go about finding such a beast. So far I am pretty confident that a 2000 Lincoln navigator and a 2003 Ford Ranger do not have such, if it is its hidden inside the dash.
Look on the heater hose near the firewall. It turns off coolant flow to the heater core when the HVAC control is in OFF or MAX AC.
Reply With Quote
  #33  
Old 08-13-2010
01_ranger_4x4's Avatar
Member
iTrader: (4)
 
Join Date: Mar 2009
Location: Muskegon, Michigan
Posts: 3,585
Quote:
Originally Posted by rwenzing View Post
Look on the heater hose near the firewall. It turns off coolant flow to the heater core when the HVAC control is in OFF or MAX AC.
mine doesnt have a control valve. none of my 4.0's have had one. my buddys 3.0 does though.
Reply With Quote
  #34  
Old 08-14-2010
V8 Level II's Avatar
RF Veteran
iTrader: (4)
 
Join Date: Nov 2004
Location: Michigan
Posts: 7,833
Quote:
Originally Posted by 01_ranger_4x4 View Post
mine doesnt have a control valve. none of my 4.0's have had one. my buddys 3.0 does though.
My 2003 Ranger came from the factory with a heater control valve and I believe your 2001 did too. Some years/engines use a 4-port with a built in bypass and others use a simple 2-port shut off valve. It depends on how the rest of the cooling system is configured. Also, some years may have the valve only if A/C equipped.
Reply With Quote
  #35  
Old 08-14-2010
Masteratarms93's Avatar
Member
iTrader: (8)
 
Join Date: Mar 2010
Location: Goose Creek SC
Posts: 4,685
Quote:
Originally Posted by Silver View Post
or stick open and never over heat lol.....
Stick open is fine in the summer. But once you hit winter it will keep the engine to cool and you won't be able to heat your car. Like driving around with A/C on in December lol.

If you thermostat is stuck closed you will defiantly notice the coolant gauge headed above normal. No one should overheat from that. Unless you're blind. But in that case, you probably shouldn't be driving.

Ok, I'm done now.
Reply With Quote
  #36  
Old 08-14-2010
Level I Supporter
Thread Starter
 
Join Date: Aug 2006
Location: Durham, NC
Posts: 3,657
Quote:
Originally Posted by silverfox View Post
i havnt read all the post in this thread im on a quick lunch break at the moment one thing i see that throws this experement off is there is no antifreeze in the system just straight coolant

coolant=water
antifreeze=chemicals that keeps the coolant from freezing in cold weather,rust inhibiters,lube for the waterpump

system will run colder with no antifreeze

thermostate is there for a reason in the right conditions it can/will overheat

I did the experiment after the first drain, so the block still had antifreeze in it.
Reply With Quote
  #37  
Old 08-15-2010
Masteratarms93's Avatar
Member
iTrader: (8)
 
Join Date: Mar 2010
Location: Goose Creek SC
Posts: 4,685
I'm 12 years old and what is this.
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Fact or Myth? Kris03 2.9L & 3.0L V6 Tech 7 01-20-2012 11:49 AM
Stock thermostat wanted 2.3L & 2.5L I4 Tech 14 08-26-2010 04:13 PM
thermostat red_fx2 2.9L & 3.0L V6 Tech 1 04-19-2006 05:41 AM
Which thermostat? Mr Mufakka 4.0L OHV & SOHC V6 Tech 10 07-14-2005 08:18 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -6. The time now is 09:10 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.