Lost a whole afternoon to a seized glow plug

I was swapping out glow plugs on an older Duramax. One of them would not budge no matter what. I applied heat and used a breaker bar, but it snapped off flush with the head. Had to carefully drill it out, which took forever. Now I have to clean out all the metal bits from the hole. This set me back on the whole job. Lesson learned: sometimes you just have to walk away and let the penetrant soak longer.

3 comments

3 Comments

leob971mo ago

On older diesels, glow plugs seize all the time, so what's the big deal?

linda_owens215d ago

Remember trying to get a frozen brake line fitting loose on my truck. Spent an hour fighting it, getting mad, and almost rounded it off. Went inside for a beer and left the penetrant on. Came back an hour later and it turned like nothing. That soak time is real, it's not just sitting around.

the_laura1mo ago

Letting penetrant soak longer is a lesson I learned the hard way too. It can feel like wasting time, but that extra soak can mean the difference between a clean swap and a disaster. PATIENCE really is a tool in the toolbox for jobs like this.