The dealer says the 4th gen's have titanium OEM plugs and it will cost 150 bucks to get a tuneup. I told him I want the NGK ones but he kept saying he only uses Nissan parts. Isn't NGK an OEM manufacturer for Nissan?
I think the dealer's lying.

 

they are good for 100,000 miles.

 

Hope that helps.

 

NGK plugs in your maxima. They are expensive, most dealer want $13-$15 each times 6 can get quite expensive. <IMG SRC=http://integra.vtec.net/geeser/megamax/images/plat_plugs.jpg>

 

I think he means platinum, not titanium. The dealer plugs that I just replaced were NGK PRF5G and should be fine but I just put the NGK PRF4G plugs in mine which are supposed to run cooler. These are less than $9 each from Courtesy Nissan.

Jim

 

Get the same heat range. IK16 I believe is the part number for the Denso. These suppose to perform better than conventional plugs. Get these plugs and get any independent garage to put them in for $30. I would never get my car service at the dealership unless it's very Nissan Specific problem.

 

I think the heat ranges on NGKs run backwards. That is if the stock plug is PRF5G a colder plug would be a PFR6G. I'm 99% on this. I was told by Don in TX that the plug to run is a PFR6B11 (stock#4014)Laser Platinum. This is the plug that the 300ZXTT folks use. The center electrode and ground strap on this plug is thinner, which helps promote spark under high cylinder pressure applications, like SC or NOS. Their the same price as the stock Maxima's, I got mine from NAPA.

If your real ****, you can index them when you install them. The theory is that you give the incomming a/f mixture a clean shot at the spark, and it also helps with cylinder effiency. I dont know if it makes much (maybe a coulple at best) or any power, but it is a trick used by many racing development people.

I asked the folks at SGP about wich direction to put the plugs and they said to point the ground strap toward the exhaust valves so that the spark will face the intake valves. I took a sharpe and put a black stripe on the upper/outer white porcelin that corosponded with the position of the ground strap. Then when you install the plug you look down the plug hole and see how it lines up. You have some play if you are using a torque wrench to install tham so you can rotate them a little bit further to get propper allignment, but watch the torque levels and use anti sieze lube. If it still dosnt line up close enough you have two choices. Try another plug until you find one that works. Or use indexing washers, these are simply washers that are different thickneses. The extra thickness causes the plug to rotate less. Moroso makes a set that has 3 different thickness washers, their cheep! When I did mine I kept trying a different plug of the six I bought until I had no more to swap around. I had to use the indexing washers on two cylinders. It takes about three hours to do. The back cylinders are a big pain in the ***!

WTF

[Edited by MardiGrasMax on 09-12-2000 at 12:45 PM]