Glow Plug Removal

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Oct 18, 2011 | 05:19 PM

kneisl99

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Joined: Sep 2011

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Glow Plug Removal

I found a bad gp. Its the front left one. A 12 v test light connected to the battery and touched to the shinny pin under where the connector was does not light.

Of the six gp's I could get to this is the only bad one.

Whats the best way to change it? I tried a search but it did not work.

Thanks!

Oct 18, 2011 | 07:09 PM

bashby

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Joined: Nov 2005

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From: Charles Town, W bygod Va

Just unscrew it and hope the tip isnt swollen. Clean the dirt from around it so it doesnt fall in the hole when it comes out.

Oct 18, 2011 | 08:41 PM

tecgod13

Logistics Pro

Joined: Sep 2007

Posts: 3,737

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From: Western Mass

1) Soak with penetrating oil of your choice (PB Blaster, Kroil, WD-40, etc..)
2) Clear away any crud around the glow plug so it won't fall in the engine (air hose works great!)
3) remove old glow plug. I think a 5/16" deepwell socket fits, but could be wrong. You may need various extensions and a u-joint to make it work well, use 1/4" ratchet as the socket and stuff are smaller and easier to get between everything
4) coat threads of new glow plug with anti-seize
5) install new plug and put the connector back on

Oct 18, 2011 | 09:00 PM

kneisl99

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Thanks guys.

I take it that its unusual for there to be problems with tip breakage etc?

Oct 18, 2011 | 10:31 PM

4odd6

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10mm deep socket for the glow plug. I use a craftsman ratchet with a swivel head to get in all the F-ed up angles it takes to pull em out - worth the investment.
2 questions: I pull the fuel lines off the injectors and bend them back slightly to get to the plugs. Is that wrong?
Shouldn't we change all the plugs at the same time?
Thanks.

Oct 18, 2011 | 11:17 PM

84-6.9L

Posting Guru

Joined: Feb 2011

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From: Princeton MN

You can slightly flex the lines but dont bend them stuff can flake off the inside and plug your injectors.

Oct 19, 2011 | 08:22 AM

tjc transport

i ain't rite

Joined: Mar 2005

Posts: 65,569

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From: Marlboro Mental Hospital.

another thing, only put a motorcraft/beru glow plug in there. any other brand will only give you problems and burn out real fast.
you can get the beru ZD-9 from rock auto for $9.87 each
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Oct 20, 2011 | 05:09 AM

kneisl99

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Joined: Sep 2011

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Ha. Jobber lied. All he had was autolite 1108. So I bought it. What came out was an 1108 so I assume they are all autolites.

I used a deep 3/8 socket to loosen and turned it out by hand. After install crank time to start went from one or two 10-20 second sessions to one >5 second one.

Since this is a $1000 vehicle so use only on occasion and to learn from, I have no plans at the present to change the plugs over to Motorcraft. Also a shot of ether starts it right up in any case so that is my backup.

Once started it runs and restarts flawlessly.