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#4621767 - 01/02/18 01:18 PM Where to place magnetic heater
otis24 Offline


Registered: 10/30/05
Posts: 1652
Loc: South Dakota
My truck has been sitting in subzero temps for over a week. I plan on getting a magnetic heater. Would it be best to place it on the oil pan or on the block? 1991 hevrolet K1500, 4.3 TBI V6.
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#4621783 - 01/02/18 01:33 PM Re: Where to place magnetic heater [Re: otis24]
Danno Offline


Registered: 10/07/12
Posts: 1920
Loc: Northern Ontario, Canada
Oil pan, lowest part because heat rises. If the heater sticks down too much and might get clipped by snow or road debris, side of the pan as low as possible.
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#4621846 - 01/02/18 02:47 PM Re: Where to place magnetic heater [Re: otis24]
SubieRubyRoo Online   content


Registered: 05/14/12
Posts: 863
Loc: Winchester, Indiana
They do make immersion heaters that stick down the dipstick tube but they would not have as much surface area.... but no need to remove the heater, just unplug and go.

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#4621858 - 01/02/18 03:01 PM Re: Where to place magnetic heater [Re: otis24]
Garak Offline


Registered: 12/05/09
Posts: 24051
Loc: Regina, Saskatchewan, Canada
For me, when I use one, it's on the bottom part of the oil pan, and I just crawl under and pull it off before I go anywhere.
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#4621895 - 01/02/18 03:36 PM Re: Where to place magnetic heater [Re: otis24]
PimTac Online   content


Registered: 03/04/17
Posts: 3464
Loc: Soviet State of Washington
Most blocks today are aluminum. The oil pan is the correct answer assuming that it is steel.
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#4621944 - 01/02/18 04:26 PM Re: Where to place magnetic heater [Re: otis24]
slowrench Offline


Registered: 11/14/15
Posts: 24
Loc: california
Magnetic heaters don't transfer heat very well,and need to be on the bottom of oil pan to be effective. Silicone pan heaters are way better, with less watts,but need to be permanently mounted.

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#4621986 - 01/02/18 05:11 PM Re: Where to place magnetic heater [Re: otis24]
irv Offline


Registered: 10/08/06
Posts: 935
Loc: Oshawa, Ont. Canada
Would not just installing a permanent block heater via a frost plug be the best option?

I have no idea, personally, but it seem like that would be the best solution, and I honestly don't think it we be that expensive, would it?

I am disappointed my wife's new Impala didn't come with one so I am going to look into it further to see if it's a reasonable possibility to get one installed?

Her last Olds Intrigue had one as does my 13 Ram. It is just something I am use to having on my vehicles.
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#4622005 - 01/02/18 05:25 PM Re: Where to place magnetic heater [Re: otis24]
Audios Offline


Registered: 11/19/11
Posts: 807
Loc: Lyndhurst NJ
For this application id say lowest point on the block possible. I just found one on amazon for my exterior heating oil tank, 200 watts did a good job of getting the temp up a few degrees, so after a few hours itll definitely work well on your engine.
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#4622177 - 01/02/18 08:13 PM Re: Where to place magnetic heater [Re: slowrench]
Linctex Offline


Registered: 12/31/16
Posts: 5702
Loc: Waco, TX
Originally Posted By: slowrench
Magnetic heaters don't transfer heat very well,


That has always been my #1 gripe with them as well.

Almost no one has an oil pan that is perfectly flat!
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#4622278 - 01/02/18 09:50 PM Re: Where to place magnetic heater [Re: otis24]
Dyusik Offline


Registered: 09/26/14
Posts: 1858
Loc: US-WA
I would slap it on right below the pick up tube. For heat transfer, get a 5 dollar tube of arctic silver from any computer supply place, newegg comes to mind.
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#4622293 - 01/02/18 10:10 PM Re: Where to place magnetic heater [Re: irv]
Rolla07 Offline


Registered: 11/05/11
Posts: 4667
Loc: MTL, CANADA
Originally Posted By: irv
Would not just installing a permanent block heater via a frost plug be the best option?

I have no idea, personally, but it seem like that would be the best solution, and I honestly don't think it we be that expensive, would it?

I am disappointed my wife's new Impala didn't come with one so I am going to look into it further to see if it's a reasonable possibility to get one installed?

Her last Olds Intrigue had one as does my 13 Ram. It is just something I am use to having on my vehicles.


This.

I bought a block heater for about 55$ and installed myself in under an hour. Works great.
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#4622313 - 01/02/18 10:41 PM Re: Where to place magnetic heater [Re: otis24]
yugrus Offline


Registered: 04/06/04
Posts: 437
Loc: ON, Canada
Block heater does not warm up engine oil though.
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#4623062 - 01/03/18 07:06 PM Re: Where to place magnetic heater [Re: yugrus]
irv Offline


Registered: 10/08/06
Posts: 935
Loc: Oshawa, Ont. Canada
Originally Posted By: yugrus
Block heater does not warm up engine oil though.


Just curious here about what is better, warm oil spilling over an ice cold engine block or colder oil spilling over a warm block? shrug

My take is, and I could be wrong, but if you have the right type/weight of oil, IE:, 0W or 5W, then my thought is it is much better for that cold oil to be spilling over a warm engine block than it is warm oil to be spilling over an ice cold engine block.
I would assume, and I could be wrong again, that the warm oil spilling over an ice cold engine block will turn the oil cold rather quickly, or quicker than, comparatively, the cold oil spilling over a warm engine block.

Thoughts?
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#4623076 - 01/03/18 07:19 PM Re: Where to place magnetic heater [Re: otis24]
yugrus Offline


Registered: 04/06/04
Posts: 437
Loc: ON, Canada
Thermodynamically it should be the same within first moments after start-up. However, warm oil will be picked up by the pump and initially flow better then cold, regardless of its grade.
If the battery is bad, it will spin the engine with ease.


Edited by yugrus (01/03/18 07:20 PM)
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#4623092 - 01/03/18 07:38 PM Re: Where to place magnetic heater [Re: yugrus]
irv Offline


Registered: 10/08/06
Posts: 935
Loc: Oshawa, Ont. Canada
Originally Posted By: yugrus
Thermodynamically it should be the same within first moments after start-up. However, warm oil will be picked up by the pump and initially flow better then cold, regardless of its grade.
If the battery is bad, it will spin the engine with ease.


I agree with that but if you are using a 0W or 5W oil that flows quite well in the temps we are currently seeing, then flow shouldn't be a problem and therefore should be relatively easy to pump.

I can't help but think, that somewhat warm oil will chill/cool rather quickly, slowing it's progress down, when it hits that ice cold engine block compared to chilled/cool oil hitting a warm engine block.
It would take far more than a bit of oil to take the heat out of the block than it would be for the block to take the heat out of the oil, imo.

Not disputing an oil pan warmer,(just how hot do those things get?) I just happen to think a block heater would be the better choice, is all.
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2013 Ram Hemi Bighorn QC 4x4
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