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kevinf



Member Since: 12 Apr 2011
Location: sheffield
Posts: 55

United Kingdom 
Glow plugs
anybody know how to test the glow plugs in situ ? managed to un plug no4 and got a multi meter to the
wire, got 12 volts very briefly when the engine was started then quickly drop off, was trying to find out
if they are standard 12v plugs or ballast resisted one, don't want to burn them out trying to test them


cheers kevin
Post #997835 28th Jun 2023 8:09am
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geobloke



Member Since: 06 Nov 2012
Location: Nottinghamshire
Posts: 4410

United Kingdom 
They are standard glow plugs on an ECU controlled timer.

You can test the glow plugs in situ and this site gives a good description of how to do that https://pmmonline.co.uk/technical/the-proc...glow-plug/

Most glow plugs will read between 1-6 ohms, if any of yours are lower or higher it would be worth changing them.

It is possible that all are dead… Both on Miffy (TD5) and Phoebe (Freelander 2) all the plugs were toast.

Let us know how you get on Thumbs Up
Post #997840 28th Jun 2023 9:09am
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geobloke



Member Since: 06 Nov 2012
Location: Nottinghamshire
Posts: 4410

United Kingdom 
You probably already know that there are only 4 glow plugs on a TD5 even though there are 5 cylinders...

But just in case... Rolling Eyes
Post #997842 28th Jun 2023 9:17am
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kevinf



Member Since: 12 Apr 2011
Location: sheffield
Posts: 55

United Kingdom 
Thanks for the link

they look a bit fiddly to get out and didn't want to burn them out by putting 12v straight to them and seeing how good the spark was Laughing


cheers kevin
Post #997847 28th Jun 2023 9:58am
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geobloke



Member Since: 06 Nov 2012
Location: Nottinghamshire
Posts: 4410

United Kingdom 
Yes it is definitely easier with the intake manifold off, but possible without.
Post #997848 28th Jun 2023 10:15am
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excossack



Member Since: 22 Feb 2012
Location: North West
Posts: 5852

United Kingdom 1999 Defender 110 Td5 SW Caledonian Blue
I use a long socket on a 3/8th and an extension. Doable without removing manifold. 1999 Defender TD5 110

Regards
John M0VAZ
Econet Station 48 no clock
Post #997855 28th Jun 2023 11:05am
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Notyalc



Member Since: 27 Jul 2018
Location: Northumberland
Posts: 161

United Kingdom 2003 Defender 90 Td5 HT Epsom Green
The engine should start without needing them. They were to help with emissions, but most are probably toast by now.

I certainly dont even bother waiting for the light, just turn the key and bang away we go without any fuss, drama or smoke.

Maybe i am lucky??
Post #997900 28th Jun 2023 6:59pm
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kevinf



Member Since: 12 Apr 2011
Location: sheffield
Posts: 55

United Kingdom 
The only reason I’m thinking about doing the glow plugs is that last winter during the really cold spells
The engine spun over for a long time before starting when it had been parked over night or at the end of the day after work and I’m not convinced it’s fuel draining back !



Cheers Kevin
Post #997910 28th Jun 2023 8:01pm
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Notyalc



Member Since: 27 Jul 2018
Location: Northumberland
Posts: 161

United Kingdom 2003 Defender 90 Td5 HT Epsom Green
I would not expect it to be glow plugs…
Post #997991 29th Jun 2023 7:21pm
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kevinf



Member Since: 12 Apr 2011
Location: sheffield
Posts: 55

United Kingdom 
Update
Finally managed to change the glow plugs whilst doing lots of other things, as already guessed all the plugs were toast, had to remove the intake manifold as 3 of the plugs were very tight, freed the plugs off by running the engine with the manifold off, till warm then working the plugs back and forth


Thanks for the previous replies


Cheers Kevin
Post #1001458 23rd Jul 2023 8:25pm
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geobloke



Member Since: 06 Nov 2012
Location: Nottinghamshire
Posts: 4410

United Kingdom 
Good job Kevin. Having the glow plugs functioning will help this winter on those super cold mornings/evenings. They are there for a very good reason after all. Thumbs Up
Post #1001481 24th Jul 2023 7:42am
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