Changing Spark plugs and Spark plug wires (Tuneup)

[Katshot]

That's not 166,000 miles, it's KILOMETERS. And the the easiest way to get to the plugs is to slide you arm up from the back of the motor (driver's side of the car). I usually lay on top of the engine and slide my arm up between the engine and cowl from back of engine towards the front. There's actually plenty of room.
Also, remember that even though the OEM only recommends changing the plugs at that mileage, I would also do the wires.

[Ralph]

Oh yeah, kilometers, damn I hate the metric system.

[Stoneage_Caddy]

ahh thanks guys i was just gonna ask the same question , trying to resolve a pinging issue on my 94 with 111,114 miles on it (running 93 octaine)

[khubla]

I have a 96 Deville with only 47K miles (just purchased from a little ole lady, garage kept....you know the story) and the plugs were shot. After replacing the caddy ran like it had 100 more horsepower. I used AC Delco 41-950 which is called for. By the way there is a lot of misinformation about the difficulity in changing plugs of a Northstar engine. It took me an hour to change all 8 spark plugs and nothing needs removing except the 2 distributor wires over each rear plug. Using a 3/8 socket, 12" extension, a swivel end, plug socket and flashlight you can access the rear plugs by working over the engine with your knees on the front motor cross brace. khubla/verizon dot com

[chacenbra]

Originally Posted by Qristofer

You are right! I used to wonder why my motor din't have that silver cover (plastic or whatever) That says Northstar V8 (even though the manual talks about Northstar). I now know why!!

Are you using a Haynes/Chilton manual? Those manuals will be VERY general and not real useful for your peticular car. hit up ebay and look for a Factory Service Manual put out by GM/HELM or you can go to their website helminc.com

[00 Deville]

You guys know your responding to a post from 2003 right?

[chacenbra]

HA! No I did not notice that