Recent Topics
2003 Hyundai Santa Fe 2.7L Kendall GT-1 Synthetic
by boom10ful
Today at 01:56 AM
How to fix a squeaking ball joint
by L_Sludger
Today at 01:43 AM
Dash Cam Install
by SF0059
Yesterday at 11:46 PM
Terrible oil filters for Mini N1x engines
by Seventh
Yesterday at 11:33 PM
NY Rebuilt tilte
by Why_Anything
Yesterday at 11:16 PM
Late Christmas Lights Present
by Ducked
Yesterday at 10:38 PM
2016 Toyota Avalon XLE Review
by Nick1994
Yesterday at 10:06 PM
Is there any benefit to using premium fuel?
by Greatwhite7
Yesterday at 09:12 PM
Possible engine damage to Honda Mower?
by blue_steel
Yesterday at 09:04 PM
Donaldson P502503 Virgin Powerstroke 6.7
by asleepz
Yesterday at 09:02 PM
Honda 15400-PLM-A01 5k miles C&P
by asleepz
Yesterday at 08:54 PM
Front Pad replacement interval?
by borgward
Yesterday at 07:52 PM
Are these bulbs a waste of money?
by NJ_Car_Owner
Yesterday at 07:46 PM
Radiator Stop Leak Recommendation
by Egg_Head
Yesterday at 05:51 PM
Dog licking cat food cans
by Donald
Yesterday at 05:22 PM
0w20 OR 5W30: nissan maxima 2017
by SDANGERS
Yesterday at 04:32 PM
2011 Ford Escape XLT
by Corollaman
Yesterday at 03:59 PM
2009 Chevy Traverse opinions
by Corollaman
Yesterday at 03:57 PM
Rotella T6 Multi Vehicle 5W 30
by rotorcraft230
Yesterday at 03:54 PM
Takata Bankruptcy
by Reggaemon
Yesterday at 03:22 PM
Newest Members
rottonj, blue_steel, SammyGG, Gojira61, TucsonTacodog
61969 Registered Users
Who's Online
18 registered (hpb, edhackett, Andy636, Hoosier_Daddy, FordCapriDriver, ChevyMan93), 966 Guests and 22 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
61969 Members
66 Forums
267049 Topics
4416637 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Topic Options
#1034319 - 11/24/07 11:57 PM How long must a block heater be plugged in for?
byez Offline


Registered: 10/21/07
Posts: 434
Loc: Canada,North America,Western H...
I guess it depends on how cold it is but how long does it take to actually make a difference? Would leaving it plugged in overnight cause any coolant breakdown?

Top
#1034386 - 11/25/07 07:43 AM Re: How long must a block heater be plugged in for [Re: byez]
va3ux Offline


Registered: 11/12/05
Posts: 963
Loc: Ontario, Canada
 Originally Posted By: byez
I guess it depends on how cold it is but how long does it take to actually make a difference? Would leaving it plugged in overnight cause any coolant breakdown?


The puny little 100-200 watt block heater is not capable of producing the temperatures that the engine produces during normal operation. You can't hurt the coolant with a block heater.

I leave mine plugged-in over night on the few really cold nights we get here in Southern Ontario. In colder parts of Canada, the engines are either running, or the block heater is plugged-in; nothing in between.

I have found that plugging the heater in for even 2 hours makes quite a difference. You could put it on a timer to turn on perhaps 2 - 3 hours before your first start in the morning.
_________________________
2001 Chrysler Intrepid 2.7L 505,000 km (313,000 miles) - now retired

2003 Kawasaki 1500 Mean Streak (50,000 km)

Top
#1034390 - 11/25/07 07:59 AM Re: How long must a block heater be plugged in for [Re: va3ux]
daman Offline


Registered: 09/23/06
Posts: 11093
Loc: Bad Axe, MI
Yup over night hurts nothing,there dsighned for that.
_________________________
"Always"....Mobil 1

Current fill: AFE 0w30

Top
#1034416 - 11/25/07 09:37 AM Re: How long must a block heater be plugged in for [Re: daman]
G-MAN Offline


Registered: 11/15/02
Posts: 8936
Loc: SC
In my experience, if you know it's going to be cold enough overnight to warrant the block heater, it's best to just plug it in as soon as you've parked the car/truck for good. That way the block heater is keeping the coolant warm, not trying to warm up ice cold coolant.
_________________________
2014 Mercedes CLA 250 (Mobil 1 0w40)
2005 Corvette (RLI 5w30 HD Low Ash)

Top
#1034428 - 11/25/07 10:10 AM Re: How long must a block heater be plugged in for [Re: G-MAN]
NYEngineer Offline


Registered: 12/12/06
Posts: 1196
Loc: NY, NY
I would get one with a thermostat and set it up on a timer so it came on a few hours before you use the vehicle.

Top
#1034697 - 11/25/07 07:51 PM Re: How long must a block heater be plugged in for [Re: NYEngineer]
pepper32 Offline


Registered: 06/01/02
Posts: 341
Loc: fairbanks, alaska
Three hours minimum even at -50F.


Edited by pepper32 (11/25/07 07:52 PM)

Top
#1034706 - 11/25/07 08:11 PM Re: How long must a block heater be plugged in for [Re: G-MAN]
va3ux Offline


Registered: 11/12/05
Posts: 963
Loc: Ontario, Canada
 Originally Posted By: G-MAN
In my experience, if you know it's going to be cold enough overnight to warrant the block heater, it's best to just plug it in as soon as you've parked the car/truck for good. That way the block heater is keeping the coolant warm, not trying to warm up ice cold coolant.


That's exactly what I do when the real cold weather hits here. Only need to do it for 5 or 10 nights a year.
_________________________
2001 Chrysler Intrepid 2.7L 505,000 km (313,000 miles) - now retired

2003 Kawasaki 1500 Mean Streak (50,000 km)

Top
#1034708 - 11/25/07 08:13 PM Re: How long must a block heater be plugged in for [Re: va3ux]
TEMPESTboy Offline


Registered: 09/10/05
Posts: 14
Loc: Canada
I use a timer and have it turn on 2-3 hours before I have to leave in the morning. This is when it is -20 degrees Celsius and colder. Use a timer and save energy!

Top
#1034810 - 11/25/07 10:53 PM Re: How long must a block heater be plugged in for [Re: TEMPESTboy]
Towel_Rail Offline


Registered: 03/01/07
Posts: 289
Loc: Iowa
Until you start it?


Edited by Towel_Rail (11/25/07 10:54 PM)
_________________________
I am boxer, I contain multigrades.

Top