Spark plug extensions?

Absent Minded Farmer · Apr 27, 2012

What's that do-dad screwed onto the end of the plug? They're not on all of the plugs, just numbers two & four. They seem to be on the oldest plugs, too.

Thanks,
Mike

Fawteen · Apr 27, 2012

A gizmo to prevent fouling.

As I understand it, a JC-Whitney-ish method of getting around a rebuild for a while. Not sure of their effectiveness.

danmcdonald · Apr 27, 2012

Supposed to stop plug from fouling. A friend of my had them on his car years ago he said that they worked.

mike1972chev · Apr 27, 2012

They worked pretty decent on a "light oil burner",but you get a really "wrung out " engine with severe cylinder wear,and these are pointless!(Time for the COMPLETE engine "tear down" !!!

glennster · Apr 27, 2012

yup anti fouling caps. they do work unless the engine is in a severe state of wear.

L.C. Gray · Apr 27, 2012

Yep definitely a JC Whitney overhaul avoidance device

They basically raise the heat range of the plug by extending the effective distance to disipate the heat from the electrodes and insulator to the head to keep the plug extra hot and burned off clean enough to continue firing.

I doubt they did anything to avoid knocking... but then again you'd need compression for that and if you had compression you prolly wouldn't need the firing cups.

Farmboy856 · Apr 27, 2012

I've used them several times over the years, and they DO work--- unless your engine is completely shot. I put a set in my dad's 86 Chev pickup with a 305 V8 in it. These engines were notorious for bad valve seals, and every cold start up it would smoke at strong blue for an instant, from the oil that had seeped down the valve and into the cylinder overnight. I was constantly replacing the #8 plug--- the hardest one to get to, of course. I put a set of these on the plugs probably three years ago-- -they were hard to find now days--- and I've not had a plug foul from oil since. The truck only gets about 1000 miles a year on it.

Matt Tieken · Apr 27, 2012

They are called anti-fouling adapters and you can get them at NAPA. They work OK at preventing oil fouled plugs.

old · Apr 27, 2012

Those are a way of making them champ plug to burn this new crap gas we have. Take them out and replace them champs with auto lites that are a cross over to the D21 if that is the champ number yours are

Absent Minded Farmer · Apr 27, 2012

It had two Champs, an Autolite & an AC. The cups were on the Champs. I have a slightly used set of D21's in, but they will get changed out for fresh Autolite 386's when I get the money again.

Mike

Absent Minded Farmer · Apr 27, 2012

It seems the further I get with this tractor, the worse things get. This machine is turning into a real Macco job. Bad cylinders, drain oil in the rear-end, a shoddy 12v conversion, a bad alternator, wrong parts, cheap parts & the paint job is only ok. One of these days I'll have the huevos to say, "I ain't buying it 'till I can tear it apart first".

Thanks guys, for your input. Hopefully this tractor gets me through the season.

Mike

Spark plug extensions?

Absent Minded Farmer

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Fawteen

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danmcdonald

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mike1972chev

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glennster

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L.C. Gray

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Farmboy856

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Matt Tieken

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old

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Absent Minded Farmer

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Absent Minded Farmer

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