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aussie_paul


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Diesel heater glow plug....
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Anyone out there know what the diesel heater glow plug resistance is?

After having start up difficulties with just white smoke happening, I have dismantled our Planer 2 kw diesel heater and cleaning the carbon & soot etc. Would like to know what resistance the glow plug should be. I am measuring 14 ohm.  My next job is to connect 12 volts to glow plug and see if it works.

The big test then will be "can I reassemble it?" biggrin

Aussie Paul. smile



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elliemike


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Just in case you have not already found this You tube Videos by John Mck47. They are usually helpful.

Drop him a not on his youtube site. He will answer your Questions.

[video=https://youtu.be/tvwmU_CcmGI?t=209]

 



-- Edited by elliemike on Thursday 4th of February 2021 07:43:48 PM



-- Edited by elliemike on Thursday 4th of February 2021 07:44:41 PM

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Mike & Ellie
Tony LEE


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2 ohms or less, but don't know what the temperature coefficient of resistance is or the working voltage of the glow plug. The heaters usually draw up to 10 amps, more for Webasto I believe so glow plug resistance could be lower than 1 ohm. They are quite sensitive to low supply voltage so that needs checking right at the heater connections Can you see if the plug is cracked?

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aussie_paul


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elliemike wrote:

Just in case you have not already found this You tube Videos by John Mck47. They are usually helpful.

Drop him a not on his youtube site. He will answer your Questions.

[video=https://youtu.be/tvwmU_CcmGI?t=209]

 



-- Edited by elliemike on Thursday 4th of February 2021 07:43:48 PM



-- Edited by elliemike on Thursday 4th of February 2021 07:44:41 PM

I can't get that link to open elliemike, BUT I have found him on Youtube. Thanks.

Aussie Paul.smile



-- Edited by aussie_paul on Thursday 4th of February 2021 09:28:13 PM

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erad


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I have a printed W/S manual for my Pajero, but I expect that other vehicles would be similar in characteristics. The manual states 0.6 Ohms @ 20 Deg C for the 4m40 (2.8 L )Pajero Diesel, and 1.1 Ohms @ 20 Deg C for the 4m41 (3.2 L ) diesel Pajero. Supply voltage is 12 V. The recommended test is to hit it with 12 volts and it should glow red hot within 15 seconds. I suspect that the glow plugs draw more than 10 amps each - there is a noticeable voltage drop when they are firing. This means that for the 2.8 L engine, the total current flow would be about 80 amps.

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Mike Harding


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As others have said, around 1 ohm.

Glow plugs normally fail open circuit so if you have any resistance it's *probably* OK although 14R cold does sound a bit high.

How did you remove it, do you have the correct tool? They are very easy to damage.

erad: he's referring to a diesel heater in a caravan.



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elliemike


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Mike Harding wrote:

As others have said, around 1 ohm.

Glow plugs normally fail open circuit so if you have any resistance it's *probably* OK although 14R cold does sound a bit high.

How did you remove it, do you have the correct tool? They are very easy to damage.

erad: he's referring to a diesel heater in a caravan.

 If you have not got one use one of those cheap Plumbing Socket  spanners  12mm AF and cut a slot in it.

That's all I use. 

 

Glow Plug Spanner.jpg



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aussie_paul


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Our diesel heater is a totally different beast. The glow plug and atomiser screen are nothing like what is on Youtube.

I hope these pics will open!! Let me know please.

Aussie Paul. smile

 

1.jpg



-- Edited by aussie_paul on Friday 5th of February 2021 01:04:20 PM



-- Edited by aussie_paul on Friday 5th of February 2021 03:05:52 PM

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Tony LEE


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Not surprising. There are 6 different control panels and remote controls

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aussie_paul


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I connected 12 volts and nothing until I bypassed the earth lead, then went red hot, BUT the connection to the earth lead fell apart at the copper to steel join. Less than 1 ohm so bad connection to the earth. Probably why I got 14 ohm yesterday. Not sure what to do now. Do I muck around with a new glow plug or just get a new heater? confuse 

 

Aussie Paul. smile



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aussie_paul


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Tony LEE wrote:

Not surprising. There are 6 different control panels and remote controls

We just need a simple system. Really don't need all the bells and whistles.

Aussie Paul. smile



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aussie_paul


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Tony LEE wrote:

Not surprising. There are 6 different control panels and remote controls

 Thanks Tony, we really only need a simple system, don't need all the bells and whistles.

Aussie Paul. smile



-- Edited by aussie_paul on Friday 5th of February 2021 03:36:47 PM

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aussie_paul


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This is the glow plug before the fault finding.

Aussie Paul. smile



-- Edited by aussie_paul on Friday 5th of February 2021 03:40:04 PM

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Gravy73


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Check out the Facebook page "Chinese Diesel Heaters", you have to request to join group. Have to sort out the wheat from the chaff to obtain relevant advice.

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aussie_paul


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Gravy73 wrote:

Check out the Facebook page "Chinese Diesel Heaters", you have to request to join group. Have to sort out the wheat from the chaff to obtain relevant advice.

Thanks Gravy73, I am a member of that fb page and as you say have to sort out the wheat from the chaff, but well worth it.

Aussie Paul. smile



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