How to change spark plugs on 1999 Pontiac grand prix gtp?

Answer 1

Some people will remove the two front motor mounts (dog bones) and with the car in park push the car forward to rotate the engine and apply the parking brake to hold the car. (Carefull not too far and damage the radiator) If you can get your eng to rock forward, that gives you more room in the rear to remove the back three plugs -this is the easiest way. Or with alot of patience and small hands (because there just isn't much room behind the engine) a swivel and an extension.

I would recomend that you replace the plug wires at the same time because the boots usually break when you remove them and with the engine rotated forward they are easier to get at.

When re-installing the new plugs, it is important to make sure you get several turns on the plug before putting a wrench on it. The last thing you want to do is cross thread a spark plug. The new plugs should almost bottom out before requiring a wrench.

Dont skimp on plugs and wires, pay the extra $$ for premium and save yourself some headaches and performance problems.

(source: http://www.grandprix.net/)

Hope this helps.

G

//This may not help on the 1999, but my 2002 GT has a hole on one of the "dog bone" bracket mounts that keeps the engine pitched forward. I used a two foot cheater bar to roll the engine forward and put the bolt through this hole and the bracket. This gave me enough room for my larger hands and the tools that I used. Hope this helps. Peace. - Spartandude

HolderOfLyte-

I drive a 1996 Grand Prix SE v6 (3.1L) I just did this about ten minutes ago. the front 3 plugs were a no brainer. For the rear three i did what everyone said with rolling the engine forward. I un-bolted the front 2 engine mounts and raised them out of the way. On a flat surface i put the car in park (engine off), and began to rock it forward. When it was up far enough i locked the e-brake (takes a few tries to get it in the right position). I then proceeded to lay on top of the engine and reached behind. The view of the plugs are still very limited, however it is MUCH easier this way. It becomes a game of fondeling the plugs essentially until you can get the plug boots off. i dont know about anyone else's, but my plug boots were all stuck on in the rear. No matter how good u are, u still need an extension bar, or else dont even try. I used a spark socket and about a 7" or 8" extension bar. the whole thing took me about an hour, as i have never done it before.