Like ya do on other vehicles, take the old ones out and put new ones in.
You should have two different spark plugs in your rotary. I can't remember what the numbers are but they are NGK laser cut platinum and look unlike any other kind of plug you've ever seen.
Your local O'reilys or pep boys or what ever your area has should be able to get what you need
4 in total.
when do you change spark plugs
4 plugs 2 leading 2 trailing.
To change the spark plugs in a 1997 astro van do I have to change the spark plugs from the bottom of the engine/
4 plugs. 2 are leading and 2 are trailing.
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the proper plugs come pre-gapped. you do not need to adjust them.
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