Broken glow plug - Chevy and GMC Duramax Diesel Forum
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post #1 of 8 (permalink) Old 10-24-2019, 10:05 PM Thread Starter
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Broken glow plug

Hi guys, I need to smog my truck, and I charge a CEL for cylinder #8 glow plug. The glow plug looks like it’s been there for a while. I tried to pay a shop to remove it, but they didn’t want to since a part may fall into the cylinder. Is there a way to by pass the CEL? Has anyone ever taken a broken plug out successfully? Any advice will be appreciated. Thanks guys
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post #2 of 8 (permalink) Old 10-24-2019, 10:16 PM
AJH
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Post #55 may help.

https://www.duramaxforum.com/forum/g...utm_source=amp

Adam

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post #3 of 8 (permalink) Old 10-25-2019, 05:54 AM
HWI
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I have 2 broken glow plugs stuck in my block (#6 and #8) that would not extract, I partially drilled them out and they still would not extract, didn't matter how much PB Blaster or heat I used. I ended up having to stop because I was afraid if I drilled any further the tip would drop into the cylinder. My suggestion to you is to get the Merchant Auto tool for this, basically a socket attachment for an air hammer, really really wish I would have purchased it before I even attempted to take it out. I am leaving them as is until I pull the driver side head, if I ever have to. Luckily I live in Florida, no inspections and doesn't get cold enough to need them, the CEL is just kind of annoying.

If you just want to get rid of the CEL, I have heard of folks soldering a resistor inline of the wire to trick the GPCM into thinking the glow plug is good, but I can't remember how many ohms it should be.

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post #4 of 8 (permalink) Old 10-25-2019, 11:53 AM Thread Starter
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That’s what I was thinking. I was thinking about putting some kind of resistor on it. I just need to know what to do. I can worry about extracting the plug later, but I have to pass smog right now.
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post #5 of 8 (permalink) Old 10-25-2019, 04:35 PM
AJH
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Are you tuned with efi live?

Adam

2015 CCLB.

Gone
2008 GMC RCLB 6.0/6l90e 315/70/17 MT mtz on h2s
2006 Chevy CCSB
Moonshine, Trans, Supporting mods
2005 Chevy RCLB
Ppe hot race,leveled, 35x12.50s on h2s
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post #6 of 8 (permalink) Old 10-25-2019, 04:42 PM
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Quote:
Originally Posted by AJH View Post
Are you tuned with efi live?
This, if youre efi tuned contact your tuner to turn the code off

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post #7 of 8 (permalink) Old 10-25-2019, 10:27 PM Thread Starter
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I have a tuner, but I can’t have a tuner when I go to the smog shop.
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post #8 of 8 (permalink) Old 10-26-2019, 03:58 AM
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go to an electronics shop and get a 4.5 amp resister.

Remove the lead from the top of the GP and put the resister inline between that lead and a ground. This will trick the GPCM into thinking the GP is there and working.

Then clear the code and go get your inspection.

I like the idea posted above about the stuck bolt remover.

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