dontcha hate it when... By Deleted (Read 1,236 times)

[Deleted]

...you go to replace your sparkplug only to find the old one is finger tight?
so i was finally gonna replace my original crap plug to a ngk and find it loose. Oil/gas and crap all in the threads and on the base around the washer. dont know how long it was like that. it has 625 miles on the clock. hope i didnt hurt the threads...

[twowheeler]

Did you put it in?

SOme people dont realize new plugs have a crush washer that needs to be seated initially.

[DrRocco]

Is there some special trick to putting a plug in, twowheeler? I put an NGK in my scooter yesterday. I removed the old one and replaced with the new. I threaded it in the hole and tightened it down with a socket wrench somewhere between "pretty snug" and stripping the threads.

[Deleted]

Mar 6, 2014 5:57:30 GMT -6 twowheeler said:

Did you put it in?

SOme people dont realize new plugs have a crush washer that needs to be seated initially.

No. Never checked it before. Crush washer was a really cheap thin one. The plug was a TNG brand that said 'made by star group' on it. Cheap cheap cheap.

[Deleted]

Mar 6, 2014 7:58:08 GMT -6 DrRocco said:

Is there some special trick to putting a plug in, twowheeler? I put an NGK in my scooter yesterday. I removed the old one and replaced with the new. I threaded it in the hole and tightened it down with a socket wrench somewhere between "pretty snug" and stripping the threads.

I know how that feels. Always been leery of aluminum heads. When I reinstalled this one just to keep dust out and I snugged it and it had ' that feeling'. Hope the head threads didn't get damaged. It was I guess just beyond finger tight because it didnt loosen til I put a ratchet on it but I think gravity on the ratchet handle was enough to loosen it. It didn't leak enough to cause a hissing on compression or anything.

[cyborg]

So the head didn't get "flame cut",,, torque wrenches gentlemen,,, it takes all the guesswork out of the equation,,, right KZ?,,,,

[DrRocco]

What's the torque spec on a plug?

[Deleted]

Mar 6, 2014 22:48:10 GMT -6 cyborg said:

So the head didn't get "flame cut",

I guess not. It tightened down again.

[Alleyoop]

To put in a plug you screw it in until it stops, that is when the squich washer has hit bottom then you give it 1/2 with the wrench to squish the washer down.
Alleyoop

[Deleted]

yup Alley said whats written on tbe ngk plug boxes. exactly

[Alleyoop]

Dang, is that what it really says on the box?? I have never read what is on any of the plug boxs just the plug number that I need and have been putting in plugs in my hotrods and cars for decades.
Alleyoop

[Deleted]

yup and ngk is the only one ive ever seen do it. it also tells you not to use them in aircraft. seriously it does. look next time you get a plug. this is on standard ngk boxes. i dont know about the iridium plugs n such

[randy]

Mar 7, 2014 0:25:26 GMT -6 @lanternscooter said:

yup and ngk is the only one ive ever seen do it. it also tells you not to use them in aircraft. seriously it does. look next time you get a plug. this is on standard ngk boxes. i dont know about the iridium plugs n such

I never noticed that diagram on the box before so I just checked and it is on the Iridium box also! I always put a little Never Seize on the threads also.

[LUKE]

fingertight plug is fine as long as its a 4stroke engine, if its on a two stroke, engine wont fire up.
i thought you guys knew that? you need to ask me before you even post this thread.

[kz1000st]

Are you drinking fermented cactus juice again?

You leave a plug finger tight and the vibration will start it shaking around and eventually blow out the threads-on anything. But hey, here's an experiment you can perform. Put the plug in your Morph and ride to San Diego, without the trailer. Let us know what happens.