Question about 1998 Oldsmobile Silhouette

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How to change rear spark plugs 1998 oldsmobile silhouette

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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.

Posted on Oct 03, 2009

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Its not easy requires patceints,but to save time go from under bottom up,rather than removing wiper asmbley and bucket.but if you have time then may be easy to remove wiper asm, and wiper bucket.good luck.

Posted on Oct 03, 2009

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1 Answer

How do I get to the spark plugs under dashboard to change out?


from under the car. its a little tricky but can be done one at a time. removing the wires and putting them back on was the hard part.

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I have a 2001 oldsmobile silhouette and I need to change the spark plugs I see the three up front but I am not sure how to get to the three in the back?


You'll have to rotate the engine forward.Remove the air cleaner duct and accelerator cable.Place transmission in neutral(Block rear wheels). Remove the two bolts and detach driver's side torque strut(front engine mounts) .remove one bolt from radiator side of the passenger side torque strut. Use a ratchering strap attach to radiator support and engine lifting eye,rotate engine forward. remove coil pack to ease access to spark plugs. Good luck!!

Sep 29, 2010 | 2001 Oldsmobile Silhouette

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Firing order and spark plug wiring digram


1998 Oldsmobile Silhouette 3.4 liter V-6 VIN "E"

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Hope helps (remember rated and coment this).

Sep 06, 2010 | 1998 Oldsmobile Silhouette

1 Answer

How do you change spark plugs on a 1999 oldsmobile silhouette i can get the front three plugs but i have no idea how to get to the back three.


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

Nov 12, 2009 | 2001 Oldsmobile Silhouette

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May 23, 2009 | 2000 Oldsmobile Silhouette

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How do you change the spark plugs on a 1999 silhouette???


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.

May 05, 2009 | 1999 Oldsmobile Silhouette

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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

Mar 14, 2009 | 1999 Oldsmobile Silhouette

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