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Another hint on O2 sensors (and spark plugs). Always install them
with anti-seize compound. I like silver (zinc ?) for plugs and copper
type for O2 sensors. I also give O2 sensors a shot of PB Blaster
before putting a wrench on them when removing. Never had
a stuck one when using these measures.
Sorry you guys with the flying rotaries couldn't get through. The weather
really was bad north of Florida as reported by the guys (and girls) who drove
through it so you made the right choice. But I was truly honored by the
presence of all the rotor heads who came. Think we had 40 or so for
Barbeque on Saturday and had a really great time. Bill Schertz'
presentation was a tour de force in cooling principles, Kelly Troyer
de-mystified the modification of the Mazda alternator for external regulator and
Richard Sohn brought us up to date on his one rotor engine, very trick
piece of work.
Tracy Crook
----- Original Message -----
Sent: Sunday, October 31, 2004 3:10
PM
Subject: [FlyRotary] Re: O2 sensor
I tried to install it yesterday but discovered that the bung
and plug are now rusted/welded together - there was no getting the plug out.
In
a previous incarnation as a foreign car mechanic, I have had similar problems
getting out broken spark plugs, CV joint bolts, exhaust manifold studs, etc.
Here are the most effective
procedures:
Heat.
It may seem counter-intuitive, but heating the plug intensely will loosen it.
Logic tells you it will expand and get tighter, but years of experience have
showed me that heating the plug works every time. I have heard lots of good
guesses, but no one has come up with a definitive
explanation.
If
you haven't rounded the head to nothing, and you can still get a good solid
twist on the stuck plug, heat the crap out of it with an acetylene torch, then
it will come right out. If you can get an impact gun on it, have the gun all
ready to go beforehand, so you can loosen the plug while it is still red hot.
A propane torch "kind-of" works, but does not have nearly the success rate of
an acetylene
torch.
If
you have broken the plug or rounded it hopelessly, there is still hope. Find a
strong bolt that is close to the diameter of the plug, perhaps a tad
smaller. (I like to use VW Bug lug bolts.) Get the impact gun ready.
Weld the bolt to the stuck plug and then hit it with the impact gun quickly,
before it has any chance to cool. This works best with a stick welder, but MIG
works too if you turn the current up and make a wide heavy weld.
Of
course, ground the welder to the pipe as close as possible to the plug and
disconnect $en$itive electronics.
Bill Dube <LED@Killacycle.com>
>> Homepage: http://www.flyrotary.com/
>> Archive: http://lancaironline.net/lists/flyrotary/List.html
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