Spark plug plus this came out

[Naseem Jarjoura]

Should I just thread it back In and regap the plug?

[72pdx02]

Looks like somebody left their compression testing fitting in the head and threaded spark plug into that. Bet it didn’t run too good. Strange?

[Lorin]

That’s an anti-fouler. 
 

I would try running the engine without it, it’s a band aid “fix” to deal with a larger problem. 

[Solarphil]

Needless to say, when you remove it make sure to remove any from the other three cylinders

[TobyB]

Given that it has an o- ring, I'd go with the 'part of a compression tester' first,

 

and 'anti- fouler' later, as the anti- foulers usually have a metal gasket

and let the gasket of the plug seal on their body.

 

That plug looks wedged in there, not seated.  3/8" NPT, maybe?

 

t

has used all 3

[Mike Self]

52 minutes ago, TobyB said:

Given that it has an o- ring, I'd go with the 'part of a compression tester' first,

+1.  Never seen an anti-fouler made out of brass and with a rubber o-ring seal.  They're steel with a compression gasket similar to what's found on a spark plug.  

 

I'm really surprised that your car was running on four cylinders, and that the o-ring wasn't all hard and cracked from the heat.  

 

mike

[jimk]

This thing is fit for "friends.....and their mechanical skills" thread.

[steve k.]

And this is why surgeons count all their tools

[PaulTWinterton]

From the title I was expecting to see a helicoil or a time-sert.  Crazy.

[Stevenc22]

That is not supposed to be there. Remove the brass part and then refit the spark plug. 

[Lorin]

12 hours ago, TobyB said:

Given that it has an o- ring, I'd go with the 'part of a compression tester' first,

 

and 'anti- fouler' later, as the anti- foulers usually have a metal gasket

and let the gasket of the plug seal on their body.

 

That plug looks wedged in there, not seated.  3/8" NPT, maybe?

 

t

has used all 3

I hear you on the oring. It seems odd to have a fitting that has the same thread on both ends, a lot of compression testers don’t even have 14mm adapter because the hose is that thread already.
 

NPT is a noticeably different thread pitch but that wouldn’t stop some people from cranking a plug in there. 
 

Maybe it’s a short extension for a compression tester but I don’t see the point. 

 

 

[tzei]

Maybe the spark plug wire was just that much too short.

[Naseem Jarjoura]

It’s from my compression tester. I left it out. Getting a lot of backfiring can’t seem to get rid of it. I set the timing and I run the 123  blue tooth dizzy. Bang bang. Noisy as hell. Might be some exhaust damage maybe from bottoming out? Looks fine but lots of bang. 

[Naseem Jarjoura]

The backfiring been happening a lot since i put the Aluminium fly wheel in. I suspect the markings I put on the flywheel are most likely incorrect. Perhaps using the light on the pulley markers would be best. Thoughts. Also, I’m getting sick of these old PHH40 soles and fiddling with them all the time. I’m going to snap and order the Webbers and be done with it.. I just really like the original look of the solex. 

[PaulTWinterton]

3 hours ago, Naseem Jarjoura said:

Perhaps using the light on the pulley markers would be best.

 

On the tii that method is the cats ass.

 

Edited July 26, 2021 by PaulTWinterton