Spark plug gap

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?

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
48,363 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

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)

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)