Cleaning paint off sparkplug threads.

AIbandit · Feb 25, 2015

I may not of masked my block very well when I painted it. A couple spark plug ports got painted. I bought a "thread chaser" but that thing is like throwing a hot dog down a hall way. I was able to screw it all the way in with my fingers and barely chip any paint away.
Anyone have suggestions?

I'm going to try a different brand chaser tomorrow.

shelbyluvv · Feb 25, 2015

Run a old plug into the hole to clean the threads.

Alaskan89XJ · Feb 25, 2015

I would not worry about it. Just smear a light coat of grease on your spark plug threads, and install. The often recommendation is to use grease in order to obtain a carbon=char so as to provide a better seal. I do not see much difference as the paint, and/or grease will char and provide the best sealing you would ever long for.

AIbandit · Feb 25, 2015

Paint will prevent a good ground? NGK says don't use anything on the threads.

ehall · Feb 25, 2015

If the threads engage then you'll have contact

If you really want to clean the threads you could put some paint stripper in the holes, or get a small wire brush on a drill (like a wire brush for a Dremel), but at some point you are going to exceed a risk threshold for dropping crap in the combustion chambers.

AIbandit · Feb 25, 2015

I think I'll try some stripper should keep the chamber safe.

ehall · Feb 25, 2015

Aircraft remover on a dummy bolt might work

mechbullxj · Feb 25, 2015

Extreme, but you could remove the head to clean the spark-plug holes. It's an option.

Bryan C. · Feb 25, 2015

Buy a real tap, coat it with grease to catch all the debris, move on with life.

AIbandit · Feb 25, 2015

ehall said:
Aircraft remover on a dummy bolt might work

Worked like a champ thank you. Now moving on with life.

kastein · Feb 26, 2015

It's an M18x1.5 thread IIRC, same as O2 sensors. Do what Bryan C said and buy a tap, they are pretty cheap on amazon, here's the one I got: http://www.amazon.com/gp/product/B002V06UJC/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

AIbandit · Feb 26, 2015

It's M14 something.

kastein · Feb 26, 2015

Whaddya know, you're right. 14mm spark plugs are M14x1.25. The cheapest one on Amazon is even Prime eligible.

AIbandit · Feb 26, 2015

Double sided one won't work with our head.

Cleaning paint off sparkplug threads.

AIbandit

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