Thread: AC delco platinums

Ok i know there are several threads about spark plugs, but could find one with these plugs
AC delco 41-940 copper platniums

The engine runs great, the gap is 0.060 and they look good.

Should i change or leave? Dont know how old these are.

And is anybody against Accel wires??

Part Number:	41-940
Weight:	0.1 lbs
Hex Size:	5/8 in.
Thread Size:	14 mm.
Electrode Core:	Copper
Resistor:	0.9-5 - 220
Heat Range:	4
Electrode Tip:	Platinum
Insulator Type:	Smooth
Seat Size:	14 mm.
Rib Configuration:	Ribless
Thread Reach:	0.679 in. (17.25 mm.)
Terminal top fixed or threaded:	Fixed
Seat Type:	Tapered
Shell Type:	Nickel plated

IF you gapped them with that gapping coin-a-ma-bobby, they may be borked.

Originally Posted by SlowNA06

IF you gapped them with that gapping coin-a-ma-bobby, they may be borked.

no just checked the gap.

I'd change them just for piece of mind knowing when they were changed last. I used accel wires on my el camino and really liked them but I don't know about on the gp's

i had those when i got the car and changed them out for ngk gold's(on sale super cheap)
also changed the wires to what you listed.
still runs just fine

For what it takes to change them on a 3.1. If you have them out. I wouldn't be taking chances of putting an older plug back in.

I only had one out, and im looking for new plugs now, just deciding which ones i want.

Good luck..I'd suggest storing some spare blood with the Red Cross for once you finish up.

Originally Posted by BillBoost37

Good luck..I'd suggest storing some spare blood with the Red Cross for once you finish up.

why, ive already changed the O2 sensor, cant be much harder, can it?

Well, the plugs are hidden behind the exhaust manifolds. Which are hidden behind razor sharp heat shields and the rear barely has enough room to get an arm down the hole. You'll be fine.

It's possible, not even horrible, but they are tougher than our 3.8L version of the car.

I guess ill have to wear my napa mechanics gloves