How do t change spark plugs on 1999 oldsmobile silhouette 3.4 liter ?

SOURCE: plug changing

take the two motor mounts off the front of the van this will allow u to get to the back 3 plugs or u can crawl underneath where the exhaust comes down at there is enough room to do it that way also

SOURCE: How do you change the spark plugs on a 1999

http://wiki.answers.com/Q/How_do_you_change_spark_plugs_in_a_Silhouette

check out this thread. Sounds like a bit of a bear for those rear plugs, similar to my truck. with plugs, it is important to have additional extensions, perhaps a u-joint extention and some patience.

SOURCE: 1999 oldsmobile alero 3.4 liter- how do u change the back 3 spark

i removed the ignition coil pack and egr and use long extension and change them from the top. but it is not gonna be easy just take your time and make sure you have all the tools you need and double check on proper spurk plugs for not doublize job to change them again.work on each by each.

SOURCE: how to change rear spark plugs 1998 oldsmobile

First you'll have to rotate the engine forward to get at the rear plugs, to do this remove the the air cleaner, intake air plumbing, and front engine stabilizers. Disconnect the exhaust flange from the engine to the exhaust pipe, from underneath the car remember to use a good set of jack stands on stable ground, when you're working under a ton or two of sharp metal you can never be too safe. Remove the upper radiator hose then put a come-a-long or ratchet tie down ******** the engine lift point and to one of the bolts left after removing the stabalizers, then winch the engine forward exposing more of the rear of the engine. As I remember you'll have to remove the EGR Valve, possibly the upper intake manifold, the ignition coil pack and the canister vent valve which mounts on the back of the coils, getting at these rear bolts is a bear, I wouldn't replace them just put the vent valve on the studs the ignition coil on top of that and let the front bolts hold the ignition coils down, it's worked fine for me for over 100 K Mi. Heed the next step, it's important so you don't have to go through the rest of your life known as Lefty. Before you put your arms behind the engine, double up the tie down strap, if one falls off it'll break and pin your arms behind the engine, safety again. As you can see this is a relatively involved process, more from the number of steps than any complexity. There are many hidden bolts and number or mark all cables you remove although none will fit any of the plugs except where their suppose to go. Take pictures, and do everything that needs to be done in the back, don't be like me and not change the O2 Sensor trying to save $50 just to have to do it all over again in 6 months. Good luck.

SOURCE: how do you change spark plugs on a 1999 oldsmobile

I have a tool for removing the spark plug boot on sale at http://taeckertindustries.com/prod05.htm

After removing the boot, use a combination of extensions and universal joints with your ratchet wrench