Replacing spark plugs: Is Gapping Really Needed?

[rodburg]

Hey guys,

I have an 03 I35 with 144k highway miles on the odo. Im tired of getting ripped off by mechanics so i decided to change the spark plugs myself. Firstly which plugs should i get ? brand? iridium or platinum? Also is i purchase plugs that are in accord with my cars specs do i need to gap them or thy come pregapped from the factory? (my car is completely stock). I'm sure this is on everyones mind as well: what kind of preventative high mileage maintenance would i be able to perform myself (i am no mechanic BY FAR). something small that goes along way pardon the cliche...All feedback is greatly appreciated . Thanks.

Rod E.

[MinisterofDOOM]

With Platinum or Iridium plugs, no gapping is needed out of the box.

[allensteiner]

b'klyn, ny...your main concern is going to be rust from all the salt in the winter. i'd go to a paint shop and get something like truck bed lining sprayed under the body and engine - i saw a ny max with a hole in the transmission housing eaten out by salt. besides that keep your fluids fresh and you'll be good.

[rodburg]

my car was leased in boston MA before i bought it and it already has substantial rust damage, it might even be a possibility that the car had water damage. i doubt applying rust inhibitor to rust will do any good and the prospect of sanding down every rusty spot is unrealistic. should i still spray the rust inhibitor ? many thanks for ur input.

Rod E

[allensteiner]

for the underside a cut and weld patch work should work better and last longer but it might be pricey unless you can do it yourself or have a buddy with a welder.

for body panel rust sanding and painting should work fine.

[D-Maxima]

^^add some rust killer product to body rust then paint too i have found in the past that works well.