: Spark Plug Wire Placement



GreenMachine
06-30-06, 12:45 AM
I've seen some pictures of northstars that show the plugs being tucked around the side or a cover for them.

http://www.caddyinfo.com/46_lg.jpg
or this one:
http://vnexpress.net/Vietnam/Oto-Xe-may/2003/11/3B9CD9F3/Northstar_engine_1B.jpg
this one might indicate when they switched to Coil on plug? I don't see the plug in place on the rear of the engine:
http://www.familycar.com/RoadTests/CadillacDTS/images/Engine-med.jpg

Was wondering if this was only on certain model years of from pre-production ideas etc etc

This one from the EVOQ concept car:
http://www.geocities.com/MotorCity/Track/2582/cadillac/evoq/evoq6.jpg

just curious :)

eldorado1
06-30-06, 04:38 PM
http://www.caddyinfo.com/46_lg.jpg
2000+ coil-on-plug, no plug wires.

http://vnexpress.net/Vietnam/Oto-Xe-may/2003/11/3B9CD9F3/Northstar_engine_1B.jpg
93-94, plug wires were routed through a plastic sheath

http://www.familycar.com/RoadTests/CadillacDTS/images/Engine-med.jpg
Another 2000+


http://www.geocities.com/MotorCity/Track/2582/cadillac/evoq/evoq6.jpg
looks similar to the 4.4L northstar with the MP120 supercharger, coil-on-plug like 2000's.

GreenMachine
06-30-06, 04:45 PM
thanks for info, the above is the concept engine from the EVOQ, its a 4.2L northstar pumping out 400/400 I think. Its basically one of the stepping stones to what the STS-V and XLR-V's 4.4L is. My guess was "kinda" right for them all :)

Patrick7997
07-01-06, 07:52 AM
On a 97 Eldorado ETC, they pass under the beauty cover and go straight down to the plugs......

GreenMachine
07-01-06, 09:13 AM
On a 97 Eldorado ETC, they pass under the beauty cover and go straight down to the plugs......

yeah mine do that too, the also form the engine getting hot, leave marks from being in one spot, possibly melting alittle on there.

krimson_cardnal
07-01-06, 06:23 PM
gotta say i like the "outside" routing of those wires. being new to the NorthStar, running ingnition under that cover just doesn't seem right, tho it does seem to work okay. most important is the correct OEM wire set...

ewill3rd
07-01-06, 09:04 PM
Not sure what the question is here really.
Maybe I am too tired.
The new ones have coil assemblies that bolt on each cam cover, no wires, just a "boot".
The original northstar had a longer wire set for the front bank and a special housing to carry the wires.
The next generation had a wire set that ran under the main engine cover with little grooves for each even wire in the top of the intake.
The newest one has coil housings with no wires.
I have had a couple 4.4s in but never paid attention to what they use.