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BBISHOPPCM »
https://forums.nicoclub.com/bbishoppcm-u54071.html
Mon Nov 03, 2008 5:57 pm
The old "30,000 mile" plugs are a thing of the past. To change these plugs, you need to drain the coolant, remove the intake manifold and all four coils, and you will need a special plug socket (not sure of the size or make/part number). The service manual (available on this site, in the "Versa" section) will detail the process.
If you're concerned about the plugs "becoming one with the cylinder head" after so many miles, I understand your concerns. This doesn't seem to be a problem on these cars, as someone has already broken the 100k mark.
Carbon buildup? not really an issue on an engine that burns clean and does not consume oil and is driven regularly. If you're really concerned about carbon, take her on a road trip and open up the throttle. It'll cost less than four iridium plugs, coolant, and labor.
I totally understand what you're thinking. My father was an auto mechanic (ASE and Nissan certified) from 1979-1993, and everything he knows (and taught me) had to be thrown out when it came to working on anything built after the early part of this decade. A lot of advances in technology have completely changed what we thought we knew about automobiles and maintenance. For instance, some schmuck on this board is planning on going to Auto Zone and buying a performance coil and Nitrous for his Versa... and won't be told otherwise!
If you have a CVT, ignore everything you know about automatics. Unless you know you're leaking fluid, or the computer is throwing transmission codes, there is no need to "check" the fluid. The computer computes the wear of the fluid (which is, if I recall, something like $75 a quart), and sends "fluid wear" codes to the computer (the engine light comes on I believe).
I read the service manual, and these newer vehicles are a very different animal from even those built five years ago. Also, the new CAN system (combined with OBDII) is a whole new way of component communication used in newer cars (2007 and up).
The plugs are not platinum; they're iridium. And they cost a bloody fortune.