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Finally finished replacing the glow plugs on the passenger side. The back 2 required the glow plug extractor tool and it was a real exercise in working in tight spaces. The heat shield limited access to a small slot. I was able to get the tool on the glow plug but there wasn't enough room to...

The glow plugs in my motorhome Cummins 400 hp are much easier to change. Access to the engine is under the bed in the rear. Just for fun, here is a picture of the motorhome towing the Humvee on a trailer.

I used two low sawhorses with planks for a platform beside the Hmmwv that came up to the top of the tire. That gave me access to the "engine plank" easily.

The WD40 and the extraction tool worked on the glow plug on the back driver side of the engine. It took some time to get it all the way out and I was sore from trying to balance myself over the top of the engine. Necessity is the mother of invention, or so it is said. I decided to make a...

It looks like the overnight soak in WD40 worked enough magic that it was pulled out with the vice grips and a small crowbar. No broken tips. Now I am starting on the back glow plug on the driver side and that unscrewed, but didn't move out of the hole but a few mm. Getting the extractor to...

Thank you, Mark. I have a borescope I can use in the injector hole for pictures and will try to post a few as this develops. One problem is the length of the wire sticking out of the glow plug hole. It is the full length of the glow plug and will need to be cut off if the tip doesn't come out...

Thanks, I was thinking that was about the only choice left. I squirted WD40 in there to see if it might make the bulb easier to pull out. Will see in the morning.

I bought the glow plug removal tool from Black Dog Customs and it is a great tool. However, it pulled the case off the wire leaving the glow plug heating element still stuck in the cylinder head. The tool obviously placed a lot of pressure on the plug to cause the case to separate from the...