[zeuss]

Originally Posted by cleatus12r

They don't get "shorter". I don't mean to offend if I read that wrong.

I assume you meant "shorted". They do "wear" electrically which is the reason they don't last forever. Your truck has about 120K right? If they're the stock glow plugs (didn't read about a replacement in your original post) then I would definitely just do them because they have 120K on them.

I NEVER tell someone to throw money at something, but glow plugs are really important to the starting and first couple minutes of drivability so it's not a bad idea to do them at 120K miles. You might consider replacing the small harness under each valve cover while you're there.

On some of the old trctors the tips would actually get shorter, thus reducing the area of heat on plug. And yes I am kinda ignorant about diesel stuff, so thanks for being kind to me. I am probably going to stick plugs in. Like I said, injectors just dont make logical sense to me, but plugs do.