Notices
1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks
Sponsored by:
Sponsored by:

How to get hot defrost faster?

Thread Tools
 
Search this Thread
 
  #46  
Old 11-21-2014, 07:38 PM
eakermeld's Avatar
eakermeld
eakermeld is offline
Posting Guru
Join Date: Nov 2013
Location: South Central,MO
Posts: 2,166
Likes: 0
Received 2 Likes on 2 Posts

You mean one of these?
 
  #47  
Old 11-21-2014, 07:39 PM
blue924.9's Avatar
blue924.9
blue924.9 is offline
Posting Guru
Join Date: Feb 2013
Posts: 1,555
Likes: 0
Received 1 Like on 1 Post
something of that sort yes
 
  #48  
Old 11-21-2014, 07:51 PM
Island Time's Avatar
Island Time
Island Time is offline
Laughing Gas

Join Date: Nov 2013
Location: Orcas Island, WA
Posts: 868
Received 5 Likes on 5 Posts
Originally Posted by blue924.9
well have you thought about one of those plug in electric heaters to get you warmth until the engine warms up?
Just go the high dollar route... Heated garage. Ow baby! Nice and warm.
 
  #49  
Old 11-21-2014, 08:02 PM
FORDF250HDXLT's Avatar
FORDF250HDXLT
FORDF250HDXLT is offline
Post Fiend
Join Date: Jul 2006
Location: Wabanaki Indian Territory
Posts: 18,724
Likes: 0
Received 37 Likes on 31 Posts
Originally Posted by Island Time
Just go the high dollar route... Heated garage. Ow baby! Nice and warm.
im on top of this option.i wont have much trouble warming her up when desired either.


but it's got to be a pretty good size shop lol.
 
  #50  
Old 11-21-2014, 09:09 PM
Fastback460's Avatar
Fastback460
Fastback460 is offline
Posting Guru
Thread Starter
Join Date: Sep 2012
Posts: 1,949
Likes: 0
Received 5 Likes on 5 Posts
Originally Posted by ArdWrknTrk
Your radiator is cooling well.

Yes, I meant to check flow through the heater core.

How long did it take to feel heat in the cab?
It was a little warmer today, which was only 28 degrees. So it was just under 10 minutes before the air started to get warm. and almost 20 minutes before It was comfortable temperature inside the cab.

Picked up a thermostat today so I'll change that tomorrow and check out the hoses going to the heater box.
 
  #51  
Old 11-22-2014, 02:06 PM
Fastback460's Avatar
Fastback460
Fastback460 is offline
Posting Guru
Thread Starter
Join Date: Sep 2012
Posts: 1,949
Likes: 0
Received 5 Likes on 5 Posts
Well, it looks like I got it fixed. Changed the thermostat, and after idling for 5 minutes it was blowing out hot air.

And I did still check the inlet and outlet hoses for the heater core and they were both really warm.


Thanks for the help guys.

Originally Posted by Island Time
Just go the high dollar route... Heated garage. Ow baby! Nice and warm.
It's going to happen one day.
My Dad and I have talked about building one for a few years, but the horse barn had to come first.
 
  #52  
Old 11-22-2014, 02:19 PM
tempforce's Avatar
tempforce
tempforce is offline
Senior User
Join Date: Nov 2005
Location: central texas
Posts: 307
Likes: 0
Received 0 Likes on 0 Posts
cardboard in front of grill or in front of a/c condenser. you need to leave some space for air, so you won't over heat.
use a block heater and or park inside to get a heat start on heat.
higher temp thermostat 195-198'f
if you have a/c, unplug the 12v wire from your a/c compresser. as you will have a/c running with defrost. (cleans the windshield better/takes longer to heat up the air).
if nothing else works, flush the heater core. you may not be getting good heat transfer
 
  #53  
Old 11-22-2014, 07:02 PM
MFJ's Avatar
MFJ
MFJ is offline
Senior User
Join Date: Sep 2008
Location: SE WI
Posts: 287
Likes: 0
Received 0 Likes on 0 Posts
Another trick I saw around here somewhere was adding a switch and vacuum solenoid to the flapper door under the hood for the MAX A/C. Turn on the switch in the cab, and the door closes, for recirculating air on all settings on a 92-96 truck.

For winter (or if the A/C doesn't work), a guy could just zip-tie it closed.
 
  #54  
Old 11-23-2014, 07:20 PM
Bad Bad Leroy Brown's Avatar
Bad Bad Leroy Brown
Bad Bad Leroy Brown is offline
Elder User
Join Date: Aug 2012
Posts: 567
Likes: 0
Received 1 Like on 1 Post
Originally Posted by ArdWrknTrk
There's no flow in the radiator until the thermostat opens anyhow.
How is a stupid piece of cardboard or foam going to do a thing?
Maybe you don't understand the coolant flow in a 460?
Maybe you don't have a good grasp of automotive cooling systems in general???

Coolant ALWAYS flows through the heater core!
LONG before the thermostat even begins to open.

I did a little observation this morning.
It was 20*, so keep in mind there was nothing extreme.

I started the truck and it was on fast idle (1,250-1,300rpm)
Drove it within 30 seconds.
3 1/2 minutes later the fast idle was still on and I had noticible warmth.
9 minutes of driving and the fast idle had come off, the cab was warm, and the needle was up in the 'normal' range between n and o where it usually sits.
These gauges work by varying the ground resistance, and as such every one will be unique depending on the ICVR and how good a ground the sender has to the block.
I see where you are coming from ArdWrknTrk, but I believe it's a more complex issue than simply whether or not the thermostat has opened yet.

No, windchill does not effect inanimate objects, BUT flowing air will cool down, or speed the cooling down of an inanimate object to the point of ambient temperatures. (just not below, as in windchill)

Put simply, flowing air attempts to keep things at ambient temperature. An air cooled engine is a good example.

A cold engine that has begun propelling a vehicle down the road has to fight to overcome the air whipping over the motors exterior surfaces. The wind is attempting to keep the engine block at ambient temperatures, while the combustion and friction inside the block attempt to warm it above ambient from the inside out. Wouldn't blocking some of the the wind keep the ambient temp air from air-cooling the block? Speeding warmup?

Now the vehicle is several miles down the road and the thermostat has just started to crack open. Same situation, wouldn't blocking some of the wind let the fluid in the radiator warm up faster because its not dealing with as much air attempting to keep it a ambient temperature?

The result is you reach full operating temp "faster" due to disallowing the physics of air flow cooling. Cheers!
 
  #55  
Old 11-23-2014, 07:25 PM
eakermeld's Avatar
eakermeld
eakermeld is offline
Posting Guru
Join Date: Nov 2013
Location: South Central,MO
Posts: 2,166
Likes: 0
Received 2 Likes on 2 Posts
Originally Posted by Bad Bad Leroy Brown
I see where you are coming from ArdWrknTrk, but I believe it's a more complex issue than simply whether or not the thermostat has opened yet.

No, windchill does not effect inanimate objects, BUT flowing air will cool down, or speed the cooling down of an inanimate object to the point of ambient temperatures. (just not below, as in windchill)

Put simply, flowing air attempts to keep things at ambient temperature. An air cooled engine is a good example.

A cold engine that has begun propelling a vehicle down the road has to fight to overcome the air whipping over the motors exterior surfaces. The wind is attempting to keep the engine block at ambient temperatures, while the combustion and friction inside the block attempt to warm it above ambient from the inside out. Wouldn't blocking some of the the wind keep the ambient temp air from air-cooling the block? Speeding warmup?

Now the vehicle is several miles down the road and the thermostat has just started to crack open. Same situation, wouldn't blocking some of the wind let the fluid in the radiator warm up faster because its not dealing with as much air attempting to keep it a ambient temperature?

The result is you reach full operating temp "faster" due to disallowing the physics of air flow cooling. Cheers!
All valid points, Leroy. Good things to consider.
 
  #56  
Old 11-23-2014, 07:34 PM
Diesel_Brad's Avatar
Diesel_Brad
Diesel_Brad is offline
Fleet Owner
Join Date: May 2009
Location: Gilbert, PA
Posts: 21,431
Received 59 Likes on 48 Posts
Heated or even non heated garages is the WORST thing for a snow covered vehicle in the winter
 
  #57  
Old 11-23-2014, 07:52 PM
eakermeld's Avatar
eakermeld
eakermeld is offline
Posting Guru
Join Date: Nov 2013
Location: South Central,MO
Posts: 2,166
Likes: 0
Received 2 Likes on 2 Posts
Originally Posted by Diesel_Brad
Heated or even non heated garages is the WORST thing for a snow covered vehicle in the winter
How so?
 
  #58  
Old 11-23-2014, 07:57 PM
ArdWrknTrk's Avatar
ArdWrknTrk
ArdWrknTrk is offline
pedant

Join Date: Jan 2008
Location: EXTREME southwest CT
Posts: 23,576
Received 15 Likes on 15 Posts
Originally Posted by Bad Bad Leroy Brown
I see where you are coming from ArdWrknTrk, but I believe it's a more complex issue than simply whether or not the thermostat has opened yet.

No, windchill does not effect inanimate objects, BUT flowing air will cool down, or speed the cooling down of an inanimate object to the point of ambient temperatures. (just not below, as in windchill)

Put simply, flowing air attempts to keep things at ambient temperature. An air cooled engine is a good example.

A cold engine that has begun propelling a vehicle down the road has to fight to overcome the air whipping over the motors exterior surfaces. The wind is attempting to keep the engine block at ambient temperatures, while the combustion and friction inside the block attempt to warm it above ambient from the inside out. Wouldn't blocking some of the the wind keep the ambient temp air from air-cooling the block? Speeding warmup?

Now the vehicle is several miles down the road and the thermostat has just started to crack open. Same situation, wouldn't blocking some of the wind let the fluid in the radiator warm up faster because its not dealing with as much air attempting to keep it a ambient temperature?

The result is you reach full operating temp "faster" due to disallowing the physics of air flow cooling. Cheers!
A physicist you are not.
"Ambient air" is not a condition known to any thermodynamicist either...
You are talking about convection.
This only affects the surface of an object, not the coolant passages deep inside.
You also misunderstand how a thermostat throttles coolant flow to keep the block at a steady temperature. (why do people insist on thinking of it as a switch? )

No, I don't agree at all.
But I am comfortable in my knowledge and can simply agree to disagree.

The heater loop will always reach the set point before the thermostat opens.
The thermostat will always throttle coolant to maintain that set point. (at the water neck)
The radiator's sole purpose is to shed excess heat, let past the thermostat.
In incredibly cold temperatures this can cause some cycling before an equilibrium is reached.
 
  #59  
Old 11-24-2014, 01:06 AM
westcoasting's Avatar
westcoasting
westcoasting is offline
Elder User
Join Date: May 2013
Posts: 533
Received 5 Likes on 5 Posts
Just wanted to throw this in.. i am in no way of much knowledge to how this cooling all works together. But i work up in the oil patch of northern Alberta and all we run is F350 diesels. We had delivery of two new trucks a month ago and being new they had no winter fronts on them. There was a definite difference in warming up time, temps while driving down the highway, and mostly the difference in temps while the trucks are on fast idle at the job site for hours on end. Once the new winter fronts were put on, big difference.

Where i live is southern B.C and have no reason to use them here as temps are mild. (comparable to Seattle climate) And our big trucks (Kenworths) all have winter fronts on also, but i am not sure if there is the same setup as a pickup.
 
  #60  
Old 11-24-2014, 02:43 AM
ArdWrknTrk's Avatar
ArdWrknTrk
ArdWrknTrk is offline
pedant

Join Date: Jan 2008
Location: EXTREME southwest CT
Posts: 23,576
Received 15 Likes on 15 Posts
Winter fronts are a lot different than putting a piece of cardboard on the radiator and effectively reducing the size of the core.
The whole radiator is still available for cooling, but blocking some or most of the wind keeps the temperature differential from being so extreme.

Up there is where you learn that -40* is the only temp the same in both Fahrenheit and Celsius.

There is no such thing as 'cold', just an absence of heat.
Conduction, convection and radiation are the three modes of heat transfer.
A radiator would more accurately be called a convector, as it sheds heat from its surface into the airstream.
 


Quick Reply: How to get hot defrost faster?



All times are GMT -5. The time now is 01:24 PM.