engine block heater operation question - Dodge Diesel - Diesel Truck Resource Forums

12 Valve Engine and Drivetrain Talk about the 12V engine and drivetrain here. This is for 1994-1998.5 engine and drivetrain discussion only.

engine block heater operation question

Reply

 
 
 
Old 12-31-2017, 04:15 PM
  #1  
Registered User
Thread Starter
 
Join Date: Oct 2007
Posts: 43
Thanks: 0
Thanked 0 Times in 0 Posts
engine block heater operation question

Does any one know how warm the block heater will get the engine coolant? Will it reach a certain temp. and stay there? Or does it always stay on and never stop heating? I have a weak coolant percentage on a truck I am currently not driving and did not realize it. I want to leave it plugged in for about three days until the outside temp. stays above 0 degrees. Just wondering what the block heater does.
gldrsh is offline  
Reply With Quote
Old 12-31-2017, 04:37 PM
  #2  
Registered User
 
Join Date: Aug 2007
Location: Edmonton, Alberta
Posts: 3,893
Thanked 29 Times in 27 Posts
A block heater is not thermostatically controlled, you plug it in and it just heats the coolant around it, it does not circulate the coolant although you can buy heaters that do but they are an inline heater that go into a heater hose.
Busboy is offline  
Reply With Quote
Old 12-31-2017, 05:12 PM
  #3  
Registered User
Thread Starter
 
Join Date: Oct 2007
Posts: 43
Thanks: 0
Thanked 0 Times in 0 Posts
I read some where it uses 750 watts. I am assuming it is always on and never turns off? What about the people who leave there truck plugged in all the time even when they are not using it?
gldrsh is offline  
Reply With Quote
Old 12-31-2017, 05:37 PM
  #4  
Registered User
 
Join Date: Aug 2007
Location: Edmonton, Alberta
Posts: 3,893
Thanked 29 Times in 27 Posts
I park in a heated garage at home but when I worked I always plugged in from late fall to spring and when we went on vacation or to work somewhere else I plugged in at the airport sometimes for weeks on end, never had a problem. I think block heaters are limited at 750 watts so 2 vehicles can be plugged into a single outlet and not pop the breaker.
Busboy is offline  
Reply With Quote
Old 01-01-2018, 12:05 AM
  #5  
Registered User
 
Join Date: Jul 2006
Location: SE Mass
Posts: 1,470
Thanked 17 Times in 16 Posts
It is a 750w heating element inserted into the water jacket in the engine block, which is a ~900 lb chunk of iron. Depending on outside temps it should keep the block warm (80-120f), wont overheat anything.
gorms is offline  
Reply With Quote
Old 01-13-2018, 09:00 AM
  #6  
Registered User
 
Join Date: Dec 2004
Location: Cape Breton,N.S / Ft Mac AB
Posts: 610
Thanks: 0
Thanked 0 Times in 0 Posts
Anything more than 3 hours before starting is a waste and your just heating the atmosphere as the block will reach as much heat as it will hold from the 750watt heater ,use a quality outdoor timer rated for 15amps and
be sure you are plugging into a working GFI receptacle .
caper is offline  
Reply With Quote
Old 01-13-2018, 10:43 AM
  #7  
Registered User
 
SIXSLUG's Avatar
 
Join Date: May 2006
Location: Pacific NW, B'ham, Kalispell MT
Posts: 5,068
Thanks: 0
Thanked 35 Times in 31 Posts
It would be cheaper to fix the coolant strength and not worry about it than leaving the block heater plugged in, or forgetting to next cold spell, or the power going out, or the breaker tripping, or rodents chewing thru the cord, etc.etc.etc.....
SIXSLUG is online now  
Reply With Quote
 
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
cbrahs
3rd Gen Engine and Drivetrain -> 2003-2007
14
01-29-2009 11:00 PM
cbrahs
3rd Gen Engine and Drivetrain -> 2003-2007
3
01-24-2009 08:30 AM
supersonictoys
3rd Gen Engine and Drivetrain -> 2003-2007
7
11-08-2008 09:17 PM
truckbouy2
3rd Gen Engine and Drivetrain -> 2003-2007
10
03-29-2008 10:48 AM
Silverjay
24 Valve Engine and Drivetrain
4
01-30-2006 02:18 PM


Thread Tools
Search this Thread
Quick Reply: engine block heater operation question


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

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.