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Spark plug change

1K views 6 replies 4 participants last post by  Redtruck-VA 
#1 ·
Thought I'd change the plugs with a step colder. Ordered up a set of NGK 4603. Going to set them to .040. Any input is appreciated.
 
#2 ·
Thought I'd change the plugs with a step colder. Ordered up a set of NGK 4603. Going to set them to .040. Any input is appreciated.
 
#3 ·
Ahh another hot thread... well got the deed done. Took about 2 hrs. Old Red comes apart pretty quick. I only use my short 10mm socket 1 inch, 2 inch and 5 inch extension. I did it from the top. My K&N filter assy comes out in a couple minutes. Used a big thick towel over the radiator to cushion my belly. Hell didn't even get dirty.
 
#5 ·
 
#6 ·
Nice!
Does it run any different with the colder plugs?
 
#7 ·
Originally posted by Birdshot:
Nice!
Does it run any different with the colder plugs?
Kevin,
I can't tell a difference. I'll get some runs in to see if there might be any difference in KR.
 
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