Spark plug backed itself out?

[huggles]

Hey


Today I worked on my Ty and found the source of my exhaust leak! Seems like the passenger side plug on the front of the engine backed itself almost all the way out! A couple threads looked chewed up too. I plug another plug in and tightened it up good. No problems yet, but I wonder if the thread in the head is screwed?


Anyone ever seen this before?


Mind you, if I recall correctly, I started changing the plugs last time on the driver's side, and started drinking around the same time. By the time I got to that plug I MAY have had a few. Or six.

 

[MadPSI]

Re: Spark plug backed itself out?

Never came across properly torqued plugs backing out as of yet... Not unless you happened to be working on a Lightning.

Beer + SyTys = a necessary evil... Although such a practise should only be used with truly PITA procedures...

 

[Typower]

Re: Spark plug backed itself out?

Speaking of this, I am changing my plugs. I broke two of them getting them out. Now that I am paranoid, what is the proper torque specifications for installing the plugs??? Cannot seem to find an answer anywhere.

 

[Bill Z]

Re: Spark plug backed itself out?

Spark Plug Tightening Torque
It is very important to properly tighten spark plugs after replacement or cleaning – especially on small engines with aluminum heads. If spark plugs are overtightened, the threads in the head can be easily stripped; if undertightened, the spark plug can blow out under engine compression. The table below gives approximate torque values for different sizes of spark plugs in both cast iron and aluminum heads. It is best to use the torque value recommended by the manufacturer in the owner’s manual, but if you don’t have that figure available, this table will serve as a general guide. Use a torque wrench to obtain the recommended torque. Torque values is for cold engines only. When engine cools, torque values may change.

Find at this URL --->http://www.louisianadisasters.org/e...mall_engines/Spark+Plug+Tightening+Torque.htm

Posted on: 5/12/2006 9:47:58 AM

 

[Don W.]

Re: Spark plug backed itself out?

One, very important, adenium: Use an antiseize compound on the threads. Only takes a bit and saves a ton of trouble on removal. This is ESPECIALLY important on alum heads. Properly tightened, antiseize will not allow the plug to come out on its own. No offence, but I'd bet a hot dog:lol: you forgot that one. When were they installed?

 

[dirtdemon]

Re: Spark plug backed itself out?

One, very important, adenium: Use an antiseize compound on the threads. Only takes a bit and saves a ton of trouble on removal. This is ESPECIALLY important on alum heads. Properly tightened, antiseize will not allow the plug to come out on its own. No offence, but I'd bet a hot dog:lol: you forgot that one. When were they installed?

... and what about copper-paste

pat.

 

[Don W.]

Re: Spark plug backed itself out?

... and what about copper-paste

pat.

Copper-paste antisieze? Seen it but don't use it only because I've had the tube of silver stuff forever. Any good name brand will work. Kragen even sells about one engine plug change worth in a little packet on the counter.