Engine warmed up, then went cold. - Focus Fanatics
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace


Go Back   Focus Fanatics > Ford Focus Third Generation > DURATEC Ti-VCT Performance (2012-Current)

DURATEC Ti-VCT Performance (2012-Current) The place to chat about any Duratec 2.0L Ti-VCT engine performance, tuning and exhaust related upgrades.

Search This Forum | Image Search | Advanced Search    
Ford Focus Tire & Wheels FocusFanatics Merchandise

Reply
 
Thread Tools Display Modes
Old 02-02-2013, 10:11 PM   #1
1slofofo
Adam
 
1slofofo's Avatar
 
Join Date: Dec 2011
Fan#: 92422
Location: Chicago, IL
What I Drive: Mk3

Posts: 2,024
FF Reputation: 6 1slofofo Good Standing Member
Buy-Sell-Trade Rating: (0)
Engine warmed up, then went cold.

Today I was sitting on break in my car, and after it warmed up, put the heat at like fan speed 2, and after a minute or two, I see the engine temp gauge slowly drop back to cold. It didn't go all the way to cold, I turned off the heat, and it climbed back up.

Should I be worried that this happened? To be fair, it's been below freezing around lately. Anyone else experience this?


__________________
Simplicity is the ultimate sophistication.
1slofofo is online now  
    Reply With Quote
Sponsored Links
Advertisement
 
Old 02-02-2013, 10:22 PM   #2
Deftmetal
Moderator
 
Deftmetal's Avatar
 
Join Date: Nov 2012
Fan#: 105884
Location: Pennant sk, Canada
What I Drive: 2014 Mazda 3

Posts: 7,214
FF Reputation: 8 Deftmetal Good Standing Member
Buy-Sell-Trade Rating: (2)
I've noticed that just idling mine doesn't heat up that fast. Also that trying to make it warm inside quickly just keeps the engine cool
__________________
Rally Revolution #14
Josh
Quote:
Originally Posted by dyn085 View Post
Don't hate on an amputee chick that's still playing with lego's.
Deftmetal is online now  
    Reply With Quote
Old 02-02-2013, 10:31 PM   #3
1slofofo
Adam
 
1slofofo's Avatar
 
Join Date: Dec 2011
Fan#: 92422
Location: Chicago, IL
What I Drive: Mk3

Posts: 2,024
FF Reputation: 6 1slofofo Good Standing Member
Buy-Sell-Trade Rating: (0)
I've realized that, too. Which is why I wait until the engine says it's warm on the gauge. But mine went backwards...
__________________
Simplicity is the ultimate sophistication.
1slofofo is online now  
    Reply With Quote
Old 02-02-2013, 10:41 PM   #4
suss6052
Focus Addict
 
suss6052's Avatar
 
Join Date: Feb 2012
Fan#: 95752
Location: ..., MI
What I Drive: 2013 Ford Focus ST2 Ingot Silver

Posts: 12,196
FF Reputation: 23 suss6052 Great Standing Member
Buy-Sell-Trade Rating: (3)
Quote:
Originally Posted by adamdv5 View Post
I've realized that, too. Which is why I wait until the engine says it's warm on the gauge. But mine went backwards...
The car says its warm on the gauge well before the engine is actually warmed up. Its more of a dummy gauge, so unless you were to have been checking in test mode the temperature sensor reading you wouldn't know that it reads 50% (aka nominal) as low as 41C or sooner which is still frozen in terms of engine temperatures. Normal operating temperature is actually closer to 80-97C when its fully warmed up.

It doesn't warm up all that fast when its cold, especially if you don't have the heater set to maximum for long enough to trigger the active shutter system to close and warm the engine up faster rather than sucking in cold air.
__________________
Moderator for: DURATEC Ti-VCT Performance, ST Performance, MK3 Focus
suss6052 is online now  
    Reply With Quote
Old 02-03-2013, 01:37 AM   #5
thejordan
Focus Addict
 
thejordan's Avatar
 
Join Date: Dec 2012
Fan#: 107706
Location: Southern, CA
What I Drive: 2013 SGM Focus 5 Speed

Posts: 624
FF Reputation: 3 thejordan Good Standing Member
Buy-Sell-Trade Rating: (1)
Thermostats open when hitting a certain temperature (150-180F for most cars), and fans kick on and off as well, which all act to cool the engine, especially at idle. Running the heater acts as an additional source for heat removal so the thermostat doesn't have to open as often.
thejordan is online now  
    Reply With Quote
Old 02-03-2013, 01:57 AM   #6
Dark 007
Focus Enthusiast
 
Dark 007's Avatar
 
Join Date: Nov 2010
Fan#: 80502
Location: Chicago, IL
What I Drive: 2001 marshall red LX

Posts: 246
FF Reputation: 1 Dark 007 Good Standing Member
Buy-Sell-Trade Rating: (0)
Quote:
Originally Posted by adamdv5 View Post
Today I was sitting on break in my car, and after it warmed up, put the heat at like fan speed 2, and after a minute or two, I see the engine temp gauge slowly drop back to cold. It didn't go all the way to cold, I turned off the heat, and it climbed back up.

Should I be worried that this happened? To be fair, it's been below freezing around lately. Anyone else experience this?
I'm from Chicago as well. I completely understand, It's been brutal out here lately, you know. My car does the same exact thing, it's an 01.


Posted via iPhone using FF Mobile
Dark 007 is offline  
    Reply With Quote
Old 02-03-2013, 11:25 AM   #7
Elizabeth
Focus Fanatic
 
Elizabeth's Avatar
 
Join Date: Aug 2011
Fan#: 89280
Location: SouthEast, WI
What I Drive: '12 Yellow Focus SE stick, 17"rims

Posts: 2,711
FF Reputation: 14 Elizabeth Great Standing Member
Buy-Sell-Trade Rating: (0)
Quote:
Originally Posted by thejordan View Post
Thermostats open when hitting a certain temperature (150-180F for most cars), and fans kick on and off as well, which all act to cool the engine, especially at idle. Running the heater acts as an additional source for heat removal so the thermostat doesn't have to open as often.
Agree. With a cold engine. the thermostat is closed until the coolant warms up in the engine enough to open the thermostat. then all that hot coolant flows out to the cold radiator, and the engine is cooled by the incoming cold coolant.
So it would be natural in cold weather for the heat to fluctuate some untill the system reaches a steady state.
Elizabeth is offline  
    Reply With Quote
Old 02-05-2013, 10:10 AM   #8
Bogey
Focus Enthusiast
 
Bogey's Avatar
 
Join Date: Sep 2012
Fan#: 104241
Location: Calgary, Canada
What I Drive: 2012, Ingot Silver SE

Posts: 516
FF Reputation: 1 Bogey Good Standing Member
Buy-Sell-Trade Rating: (0)
Your heater is just acting like a radiator cooling your engine , especially if its cold out. Happens all the time in the great white north thats why when we start our engines if its cold to turn off the heater until it get warm.
Bogey is offline  
    Reply With Quote
Reply

Bookmarks & Social Networks

Thread Tools
Display Modes

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

Forum Jump


All times are GMT -5. The time now is 10:49 PM.


Copyright 2002-2014 FocusFanatics.com. All Rights Reserved : Terms of Use : Privacy Policy : Advertise Information : Site Map

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Acura TLX or Fiesta ST. You can find all Ford Focus and Focus ST related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area.