AC Delco 41-962 Spark Plug Gap

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Oct 7, 2013 | 04:44 PM

Macleod52

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Drifting

Joined: Jun 2013

Posts: 1,294

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From: Iowa

AC Delco 41-962 Spark Plug Gap

I'm a little confused on the correct spark plug gap. I know that the Delco 41-962 are the OEM Platinum plugs that were often used. From what I've read these plugs were gapped at .060 but when the switch to Iridium was made the gap was changed to .040.

These plugs per Advance Auto and Amazon's website state that they are gapped to .040 (will have to verify when I get ready to install). Is this gap okay? Why would the same plug be set at .060 from the factory but is now being recommended to be used at .040?

Oct 7, 2013 | 05:59 PM

c31980

Racer

Joined: Nov 2007

Posts: 318

Likes: 3

From: kuwait

my 2cents .. u don't need to change the gap if u r running a stocker engine .. beside
u have to be carful if u have to adjust the gap

Oct 7, 2013 | 06:12 PM

TastyBacon

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Joined: May 2013

Posts: 740

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From: MN

.050" works well for me.

Oct 8, 2013 | 09:35 AM

3boystoys

Melting Slicks

Joined: Jul 2012

Posts: 2,507

Likes: 9

.040 is correct, mine ran bad @ .060, changed it to the recommended .040 and she Purrs

Oct 8, 2013 | 10:24 AM

bob22z06

Pro

Joined: Aug 2006

Posts: 548

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From: Lexington KY

I think I ran mine gap on the NGK TR55 plugs at .050 also. .the car runs fine without a tune too

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