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A collection of helpful articles based on reader submissions
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Below is a collection of Jim Grant's Tech Tips sorted by Vehicle Make. These Tech Tips were answers to questions submitted to Jim by ALLDATAdiy.com users over the course of many years.
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  Jim Grant's Tech Tips

'91 Nissan Maxima, Replacement Spark Plug Concerns

Q: I own and am happy with a ‘91 Nissan Maxima. I recently took a trip and had an engine skip, found a leaking spark plug wire. I taped the wire for a temp fix and it worked fine. As the vehicle has 132k miles I am going to change the plugs and wires. My shop manual recommends BKR6ES-11 as a standard, 7ES as cold plug and 5ES as hot plug. I went to the parts store and they gave me Bosch 4202 as equal to BKR6ES. Bosch has such a tiny electrode, I wonder about that. I am thinking of going to a Champion or Autolite. I haven’t removed the original. I assume they are NGK or something like that. What brand of spark plugs do you recommend? Should I anticipate any problems? I have always done my own maintenance, except timing belt replacement at 90k. Would appreciate your input... Dan

A: Wow, 132k without changing the spark plugs! This is how I look at it. If a customer gets 80k out of a set tires, I sell them the same brand and model. If a customer were to get a 138K out of a set of spark plugs, I’d sell them the same type. Bottom line? Don’t mess with the recipe if it works!

 
     
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