[67drake]

I need to replace a glow plug on my Duramax after work today. These threads on the plug are kinda weenie. I was considering putting a dab of anti seize on the threads of the new one, but worried it might affect its performance because it wouldn’t ground well?
Any ideas pro or con?
Thanks

[Trulyvintage]

Before you remove the glow plug spray brake cleaner and blow any residue out of the glow
plug depression - if the female threads require cleaning, you can use a fine wire brush with a taper and then make sure you vacuum out the cylinder before you put the new glow plug in.


Lubricant is not required - just snug up
the plug & then back out and tighten
carefully - I replace all the glow plugs
when I service my diesel.


Jim

[Sirrotica]

By all means put it on, any diesel glow plugs should have it on. If you've never broken one off a glow plug in a cylinder head, believe me, you don't want to. The thin metal shell is prone to twist off when the threads freeze into the heads. When they break off you're likely pulling the head to remove it. The cylinder heads are cast iron so you need something to help with the galvanic corrosion.

I use never seize after cleaning the body grounds to keep the connections from becoming corroded in the salt bath environment we have in Ohio, it works fine. I also use it on spark plug threads, and on the glow plugs in my diesel trucks.

There are 2 types of never seize, one uses aluminum, and one uses copper, they both will conduct electric, but copper is slightly better.

[67drake]

Thanks guys.
I put some on. After I posted this my diesel mechanic son got back to me. He said he puts anti seize on when he replaces them too.
All done BTW
I was getting an error on the #6 cylinder and the code said glow plug. I’ll find out in the morning if it’s working!

[Bills Auto Works]

Yes Definitely put never seize on your glow plug threads.

As someone who has actually done them from time to time....You never want one to break off, because it is a bitch to get the broken piece out

God Bless
Bill
https://www.jalopyjournal.com/forum/...closed.614419/

[Bills Auto Works]

Originally Posted by 67drake

Thanks guys.
I put some on. After I posted this my diesel mechanic son got back to me. He said he puts anti seize on when he replaces them too.
All done BTW
I was getting an error on the #6 cylinder and the code said glow plug. I’ll find out in the morning if it’s working!

Typing at the same time LOL

Glad you were successful !!

God Bless
Bill
https://www.jalopyjournal.com/forum/...closed.614419/

[limejudge69]

Originally Posted by Sirrotica

There are 2 types of never seize, one uses aluminum, and one uses copper, they both will conduct electric, but copper is slightly better.

There are actually 4 types of anti-sieze: Copper, Aluminum, Moly and Nickel. They all have their specific recommended usage. Aviation uses nickel a lot due to the high temps and stainless/exotic alloys

[Sirrotica]

Maybe I should have said automotive never seize, the others aren't common in automotive usage. You won't find them in a parts store or in one of our garages. Thanks for keeping the record straight..........