Duramax Diesels Forum Truck of the Week
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Old 06-23-2019, 10:48 AM
CamaroDMax CamaroDMax is offline
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Default Glow Plug Deletion Question

Hi Guys,

For the guys that have removed their glow plugs, what's the lowest ambient temperature that you have started your truck without any issues? I understand it will take more cranking amps to turn over a cold engine, just wondering if there's a certain temperature that these engines hate. I'm in Colorado, I won't be driving the car if's its less then 50 degrees F outside.
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Old 06-23-2019, 10:57 AM
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Default Glow Plug Deletion Question

You will be fine on stock/smaller injectors

Iíve ran glow plug deletes for the last 4 years. Started it in 15* outside temps a few times after sitting all night without issue. Coughed and spit for about 30 sec but cleaned up after.

If you run large injectors (200% or more), it will take some tune work to get a nice start up
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Old 06-23-2019, 11:01 AM
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I've had my old one start at 10 degrees out. Something to consider is many lb7s on the road today have burnt out glow plugs but they dont know it. Common rails are pretty forgiving.
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Old 06-23-2019, 11:51 AM
CamaroDMax CamaroDMax is offline
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Thanks for the info guys. That’s what I was hoping to hear. One of the glow plugs on this salvage engine looks damaged. The threaded stud is slightly bent. I will pull these glow plugs and put blanks in.
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Old 06-23-2019, 12:09 PM
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My former LB7 started at 14* sitting out all night with the glowplug module disconnected and with relatively weak batteries. Started up fine even with the slow cranking.

Very little smoke and stock injectors
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Old 06-23-2019, 03:12 PM
CamaroDMax CamaroDMax is offline
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Quote:
Originally Posted by 2004LB7 View Post
My former LB7 started at 14* sitting out all night with the glowplug module disconnected and with relatively weak batteries. Started up fine even with the slow cranking.

Very little smoke and stock injectors
That's good to hear. I shouldn't have any issues with deleting the glow plugs.
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