Anti-seize lubricant on spark plug threads?

So your blaming the incorrect torqueing on........

Done this all my life....and I've never had to visit a guy like you....
only for a factory overhead cam defect...on an champ.....loooong time ago..

Yeah my mom and brother who drive brandnew toyotas (Hybrids..o' god help us) will be there suckling off the toy mechs for years....dont have a choice anymore...I wouldnt allow anyone else touch those....

At least if they give bad advice, cost em a replacement engine.....most of the rest of us here right now dont have that...

 

One word: LCA cam adjustment bolts and sleeves. Toyota never intended owners to alter suspension geometry, so why be able to adjust caster and camber after dealer prep?

 

Apples to oranges

 

As I ponder a bit more deeply, I see your point; my counter example doesn't relate well to sparkplugs. My point is that the "toyota engineers know best" way of thinking shouldn't always be taken as gospel.

 

While that may or may not be true. I don't know of any mass produced vehicle that comes from the factory with any type of anti-seize/lubrication on the plugs.

 

Well, the Triton engines used in Ford F150s (one of the best selling vehicles on the road) are notorious for seized plugs...re: anti seize, just because they don't, doesn't mean they shouldn't.

 

Those Triton engines...both the V8 and V10 were junk because of a crappy design.

 

When I was younger I would crank a spark plug down and pay the devil to take it out. I like others here learned to tighten spark plugs down with a "feel". I learned something new on this thread and that is to not use anything on NGK spark plugs, you are never too old to learn. Ford has had horrible problems with spark plugs and aluminum heads so I suppose a bit of anti seize could help them.

 

Yeah, I have heard reference to two different torque specks. One for with and one without. I would have to look back at my reference, but I remember being shocked at the difference.

I personally have always used it conservatively when putting plugs in aluminum heads. I've never had a negative experience from its use. But I have seen a couple of thread nightmares from some that didn't.

 

Curious, what were the problems with the heads you saw from people using anti-seize on spark plugs? And what kind of head work did you have to do?

 

Pulled the spark plug threads out of the heads.
When you use that shit your filling the clearance between the threads and the head. So now you have in 0 clearance fit. And that stuff dries out and gets harder than when it was put on.
So now your fighting that stuff trying to unscrew the plug. Like trying to cut threads with a tap but it’s not a tap. And it gets harder, and harder, cause it’s starting to stretch and or deform the head and then it gets real easy. When it gets easy, I have a good paycheck…

 

That's just it, as I'm sure you do, we must always care enough! It's what separates us from the heathens!!!

 

I don’t use it but I change every 30k per the manual. Fight me

 

Out of curiosity- how much anti-seize do you think is involved in these cases? Edit: Is there consistency in it being an excessive amount. I'm considering an excessive amount to be more than extremely small dab.

 

dono.
It was on all the threads, the threads were mostly filled and between the threads that came out of the heads.

 

Interesting. I've only ever applied very small amounts of anti-seize (on any bolt), and I've never had it "harden" on me. I wonder that could be correlated to an application amount or particular brand.

 

Heat for one

 

Obviously, heat.. but I wonder if it's more likely to harden in larger amounts. Again, I've never seen it harden.

 

I don’t know.
I just offered my experience.
What I’ve seen many times
What’s happened many times
Do whatever floats your boat…