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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