Ok i was trying to change my spark plugs in my 1986 z28 305 today and all i have to say is how the **** do u do it?? I was useing exstantions and swivals and i couldn't get to all of the ones in the back.. How do u do it is ther a specil techniqie or tool??? Thanks..

 

Well the plugs are 5/8" so you'd obviously need a deep 5/8" spark plug socket, and possibly a 5/8" combination wrench. If you can't get the spark plug socket in there, try using the socket directly on the spark plug without the ratchet, and then turn the socket with a 14mm wrench. If that's not working for you, try putting the 5/8" wrench on it.

As painful as it sounds, they come out so much easier when the engine is warm. Don't forget the penetrating fluid for old nasty plugs.

 

With the stock exhaust manifolds you should be able to get most of them from the top and rearward ones from underneith. When you go to headers it may be time to modify one of your sockets or buy one like I did from ebay. This tool makes things so much easier and I can install and or remove plugs in a few minutes.

 

I've always found its easiest just to do them all from underneath the car.

 

The easiest and cheapest way to get them is to use a double ended ring spanner. Most spanners have an open end and a ring end, but you can get them with a ring at both ends, and these ones usually have the ring part ofset by 2".

I found that with the headers in the way, these ring spanners work a treat. You have to be careful to get a good alignment onto the nut part of the plug and don't hit the ceramic part.

Si.

 

listen to the scotsman. for those of you who speak American and not ENGLISH, a ring-type spanner is a box end wrench.