Spark plug gap

Tiny
JOEY341974
  • MEMBER
  • 2001 BUICK LESABRE
I took my plugs out of my car and they were gaped at.75 and the Oreillys computer said.60 gap these plugs I bought were pre-gaped at.75 already. I looked in my car manual and couldn't find any spark plug gap settings. So is.75 the right setting?
Sunday, August 30th, 2009 AT 11:05 PM

3 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 50,271 POSTS
Hello,

Here is a guide on how to replace your spark plugs along with a video on how to check the gap on your spark plugs before you install them.

https://www.2carpros.com/articles/how-to-change-spark-plugs

and

https://youtu.be/c9_NVXiwvYg

Here are the specs for the plugs,

Spark Plug AC Type 41-921

Gap 1.52 mm (0.060 in)

15 Nm (11 lb-ft)

Please let us know if you need anything else to get the problem fixed.

Cheers, Ken
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Friday, September 29th, 2017 AT 4:57 PM
Tiny
CYBERJAZZ
  • MEMBER
  • 1 POST
  • 1990 BUICK LESABRE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 20,000 MILES
What is the Correct Gap for a spark plug on a 1990 useing split fire plugs
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Monday, May 3rd, 2021 AT 10:17 AM (Merged)
Tiny
SERVICE WRITER
  • MECHANIC
  • 9,123 POSTS
Splitfires are a sexy glamorous spark plug that is junk.
I don't think they are gap adjustable either.

The gap is.060

Pick up a set of delco or autolite (605) plugs
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Monday, May 3rd, 2021 AT 10:17 AM (Merged)

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