Friday, September 23, 2011

Is it going ot hurt to have a spark plug a lil bit longer than the stock one?

I havent changed my spark plugs for about 8 years now I went and bought 8 bosch spark plugs but heres the delima the stock spark plugs have a thread length of (just guessing) about 3/4 of an inch? and the new ones are about a inch and a 1/4? or a inch? its not a big difference but is this going to hurt to have longer threads than before?
Is it going ot hurt to have a spark plug a lil bit longer than the stock one?
Take the Bosch plugs back and get the OEM AC-Delco parts. Small block Chevrolet's do not have 3/4 threaded reach in the cylinder heads. You'll hammer the pistons. Go directly to the New AC-Delco Website and feed in your application for the proper spark plugs. You didn't say which year yours was.
Is it going ot hurt to have a spark plug a lil bit longer than the stock one?
DO NOT STICK THOSE PLUGS IN!!!!!!!!!!!



if there to long when the piston comes to the top it could hit the new plug and seriously damage the piston(and the plug)



its to easy to return the plugs and get the correct ones



and replacing pistons are not easy
not necessarily. If you bought the spark plugs conforming to your car make and model it shouldn't be a problem. if you bought it without conforming to your car needs the threading could be unmatched to the car's threading thus can cause it to strip the threading in the engine for your spark plug. usually the piston would hit the plug if there is not a good enough gap.
why not take them back and get the right ones? but im not sure if it would effect the detonation int he cylinder but there's a chance the pistons would hit the spark plugs
Check the length from it's seat, where it stops on the head,to it's ground electrode. Some plugs have threads that look goofie.
Yes it will hurt in more ways than one!!

The length of the threads is called %26quot;reach%26quot;. and this is how deep the plug goes into the head, now if the reach is too long you can cause immediate problems such as a piston strike which will damage the piston. If you are lucky enough to dodge that bullet, there is another problem waiting for you when you change the plugs again. The threads that are exposed inside of the head will become filled with carbon making them difficult to remove, and even if you are able to get them out the threads will probably be ruined.

Better on yourself or whoever works on the car next, would to be to get the correct plugs to start with. By the way when you have the right ones, replace them one at a time so that you do not ruin the firing order.
The position of the spark plug tip in the combustion chamber also affects combustion efficiency and how the gases enter and leave the cylinder. I'd also question whether the plugs have the same heat range. It's never a good idea to change plug characteristics without a good reason and knowing that the new plugs will solve the problem. In the long run you'll probably be better off putting in a set of plugs that meet the OEM specifications..
Doesn't matter, since you will be changing those plugs sooner than later, anyway.



Bosch plugs do not seem to like anything but Euro cars for whatever reason.



Get ready for some practice! (Cue Allen Iverson, %26quot;We talkin' about practice???%26quot;)