Re: Smashed Plugs, What went wrong?
As far as the plugs go, books may say that Bosch Plugs will
fit, maybe even work.
But - is your engine made in Germany? Do you think the
engineers that designed that engine used German plugs?
Use what they designed it around.
The reason Bosch is promoted by parts houses is they cost
them nearly nothing compared with real plugs.
Now look closely at them with a magnifying glass.
Are they melted and burned? Or beat to death.
I'll bet what happened is at least one was running too hot,
the tip melted off of one, then the pieces bounced around
from cylinder to cylinder through the intake manifold.
Yes, trash can jump from cylinder to cylinder through the
intake valves, I've seen it several times - even happened
on my 225 oddfire (I was trying out Splitfires.)
Looking close may reveal one melted, the pieces beat the
others to death.
Use the correct AC plugs, or Champion, toss those Bosch
engine killers out.
Don't use yellow, pink, blue, platinum, split fire,
fire rings, Mexican, Jap, Argentina, rebuilt, "gas savers,"
or any of the other gimmick plugs that are "made to sell,
not to use."
Every month there's another "miricle" plug introduced, at
the same time, last year's gimmick goes away.
Look at the Champion or AC book. Why do they call out so
many numbers when yellow or Bosch plugs only have a few?
Ask your wife how she likes "One size fits all clothes."
If you are lucky you didn't hurt anything. Valves can get
bent like that, pistons can be collapsed (rings lands get
crushed,) holes poked in pistons etc, but if you are lucky
it'll be OK. Hopefully when it melted the hunk off you
shut it down soon.
Try a new set of "real" plugs before crying too much. Before
installing them, squirt a few shots of oil in each cylinder
and spin the starter quite a bit. Hopefully anything left
in there will clear out harmlessly. You may even want to
poke a magnet around in each cyl too.
I know I'll get arguments about using "magik" plugs, but
the proof is in the results, and you proved it.
Let us know on this thread how you fare.