Search



Go Back   MustangForums.com > Ford Mustang Tech > 4.6L (1996-2004 Modular) Mustang
Sign in using an external account
Register Forgot Password?
Search

4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.
Sponsored by Cruizin Concepts


Welcome to Mustang Forums!
Welcome to Mustang Forums.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
 
 
 
Thread Tools Search this Thread
Old 06-19-2013, 11:06 PM   #1
The Green Lantern
 
Join Date: Jul 2011
Vehicle: 2004 Mustang GT
Location: Tejas
Posts: 36
Default Cooler Thermostat Questions

I put a 170* in my 04 GT a couple months ago cause my gauge before would always read 3/4 hot and when i drove without the A/C on I could always feel hot air coming from below by the pedals. Here in texas its obviously gets hot so it usually stays around 180 when its hot.

I have just basic bolt ons, no cats/offroad xpipe, etc, so is there anything I should change to accommodate for the lower temp. I have a diablo tuner and its just set on the 87 performance, might start running 93 again. Other than that though can/should I change spark timing? Car has 115k on it if that matters and is a DD.

Thank You.
This ad is not displayed to registered or logged-in members.
Register your free account today and become a member on Mustang Forums!
The Green Lantern is offline   Reply With Quote
Old 06-20-2013, 02:22 AM   #2
Sonic Mustang
Banned
 
Join Date: Feb 2013
Vehicle: 2004 Mach 1
Location: USA
Posts: 545
Default

What temperature is your car running at with the 170 degree thermostat? You can find out by bringing up cylinder head temperature on the gauge cluster test/trick.

http://www.mustangworld.com/ourpics/fcar/dtcodes.htm

The link at the end of the article explains what you are seeing on the display.

I am reasonably certain that cylinder head temp is actually coolant temp.

My Mach 1 has the stock thermostat and according to the Scan Gauge II plugged into my OBDII port, my coolant temperature normally runs at 190F and a little higher on hot days. The temp gauge stays in the middle.

I think 180F is too cold. I'm wondering if your gauge is off.

Last edited by Sonic Mustang; 06-20-2013 at 02:19 PM.
Sonic Mustang is offline   Reply With Quote
Old 06-20-2013, 07:27 AM   #3
fastbackford351
Foghorn Leghorn
 
fastbackford351's Avatar
 
Join Date: Dec 2006
Vehicle: 1967 Fastback & 2002 GT Convertible
Location: Florida
Posts: 1,916
Default

Huh.

How about that?


That's a neat link. I'm going to give try that just for the giggles and grins.
__________________
Government Warning:

Governments are extremely dangerous.
Death, imprisonment, theft of property
and loss of freedom will result from
giving them too much power.
fastbackford351 is offline   Reply With Quote
Old 06-20-2013, 09:25 AM   #4
moncherou
 
Join Date: May 2013
Vehicle: 2003 Mustang GT
Location: California
Posts: 40
Default

170 might be a little too cold and the pistons/rings might not be expanding and sealing like they should or more cold spots than normal (cold is relative). i have a 180 degree thermostat in mine and the temp ranges from 180-200 when i monitor with a tuner. i'd rather stick with stock but with the non-intercooled blower i experienced some problems on hot days which the 180degree thermostat sorta, kinda, helped with

the cylinder head temp is the coolant temp, i believe the sensor makes contact with the coolant where its at in the cylinder head
moncherou is offline   Reply With Quote
Old 06-21-2013, 03:43 PM   #5
The Green Lantern
 
Join Date: Jul 2011
Vehicle: 2004 Mustang GT
Location: Tejas
Posts: 36
Default

I think the gauge is messed up because when the temp is at 170(confirmed by tuner) it stays right in the middle, but then if it goes up to like 176 it will go 3/4 hot. Today I had the a/c off and the fan isn't programmed to come on till what is normal(200-210) so it got up to about 195 and the gauge still stays 3/4 hot.
The Green Lantern is offline   Reply With Quote
Old 06-21-2013, 05:25 PM   #6
Sonic Mustang
Banned
 
Join Date: Feb 2013
Vehicle: 2004 Mach 1
Location: USA
Posts: 545
Default

A correctly functioning temp gauge will stay in the middle at 205F or more. Put the regular thermostat back in!
Sonic Mustang is offline   Reply With Quote
Old 06-22-2013, 06:24 AM   #7
LilRoush
6th Gear Member

 
LilRoush's Avatar
 
Join Date: Feb 2007
Vehicle: Roush
Location: South FL
Posts: 8,514
Send a message via AIM to LilRoush
Default

If your coolant temp is actually lower than your dash is telling you, then you have an issue with the gauge or the coolant temp sensor.

The 170 thermostat isn't always a bad thing, it will just allow coolant to circulate to the raditator sooner. If you use it, keep your fan temp the same so it won't kick on until the 210F range.
__________________
~Matt
1998 Roush: M112'd Aluminum block 4.6L 2V 6 speed track car
1999 SVT: Mostly stockish
1970 Mach 1: Resto-modded monster

2000 Roush #5004 - World's FIRST M112'd V6 Mustang. Sold, but not forgotten.
LilRoush is offline   Reply With Quote
Old 06-22-2013, 09:01 AM   #8
AzPete
4th Gear Member
 
AzPete's Avatar
 
Join Date: Aug 2008
Vehicle: 08 GT Vert, 02 GT Vert
Location: Panama City, FL
Posts: 1,212
Default

The thermostat also must allow the coolant to sit in the radiator long enough to actually cool down. If it opens to soon or to often, the coolant starts on a cycle of never getting cooled properly and that actually raises the operating temps of the cars. There is a balance that must be reached when switching from a stock thermostat especially on a stock car.
__________________
AzPete
Retired USAF
Panama City, Fl.
I wake up in the morning with nothing to do and by supper time, I have half of it done.

2008 GT Vert, stock
2000 Lightning, s/c, tuned, Basanni, built tranny
Previous Mustangs:4 - '66 Coupes(silver/blue/grey/red) '87 GT HO, '00/'02/'07 GT Vert(red)(grey)(black), '68 Coupe, '11 GT/CS
AzPete is offline   Reply With Quote
Old 06-23-2013, 11:30 AM   #9
The Green Lantern
 
Join Date: Jul 2011
Vehicle: 2004 Mustang GT
Location: Tejas
Posts: 36
Default

This might sound dumb but I feel like the car runs stronger and better now with the 170 in it then it did with the stock one. It seems the gauge is messed up but is that something worth really fixing?
The Green Lantern is offline   Reply With Quote
Old 06-23-2013, 04:56 PM   #10
Sonic Mustang
Banned
 
Join Date: Feb 2013
Vehicle: 2004 Mach 1
Location: USA
Posts: 545
Default

Quote:
Originally Posted by The Green Lantern View Post
This might sound dumb but I feel like the car runs stronger and better now with the 170 in it then it did with the stock one.
If that's the case, why not try a 160, or 150 or....?
Sonic Mustang is offline   Reply With Quote
Old 06-23-2013, 04:56 PM
MustangForums
Ford Mustang




Paid Advertisement

 
 
 
Reply

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

Forum Jump

Advertising

Featured Sponsors
Vendor Directory
New Sponsors
All times are GMT -5. The time now is 07:53 AM.

© Internet Brands, Inc.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.

This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company
Emails Backup