spark plugs

[sanchlr88]

im going to change the spark plugs on my 2004 navigator but im not quite sure what spark plugs to get theres a few to choose from i want to get one of the best ones there is any one nows plz help

[go_phx]

I don't get to this site often...but thought I'd post my experience changin the plugs in my 2006 Navigator....

After much internal debate...I decided that I would rather tackle the spark plug change myself at 36,100 miles on my 2006 Navigator. I have read all of the absolute horror stories about broken ceramic or worse, the dreaded empty shield in the head. Well, I had none of that and all 8 of my plugs came out - rather easily I might say. Not sure if it matters, but my Navi is a very early 2006 model build. Engine date is May 05 and my door jamb says build date is June 05.

Plugs I used were Motorcraft SP-462 (PZT1F) ordered from RockAuto @ $7.32 each. I originally had the Champions but returned them after hearing others review. Besides at $18/plug for the Champion...the Motorcraft is a much better value. I used B12 Chemtool Carb & Choke cleaner as the carbon softening agent.

I tackled the passenger side first to get the tough bank out of the way.

Engine was STONE COLD. I positioned it in the garage last night so I wouldn't have to turn it over at all today. I started at about 9:00am.

1. Disconnect negative battery

2. Disconnect all 8 COP, COP harness and injector harness

3. Compress air to blow out all debris from plug holes

4. Without turning the plugs one bit, spray about a teaspoon of B12 Chemtool in all 8 plug holes

5. Ran a bunch of errands to kill about 1 1/2 hours of time to let the B12 work.

6. I started with #5 - real easy to get so I could get the feel for what this was going to feel like. Much to my delight, it started twisting real easy. After a few turns, I used the compressed air to blow any excess B12 out of the port so it wouldn't flow into the combustion chamber when I removed the plug.

7. With the plug out, used more compressed air to makes sure all debris was out.

8. Used nickel anti-seize on the threads and shield (see pic).

9 Repeat on #6, #7, #8.

10. I used A silicone dielectric grease on the COP boots and all electrical connections.

11. Moved to driver side and completed #1, #2, #3, #4.

12. Numbers 3 and 4 were the only two plugs that screeched at all coming out so I took a whole lot of extra time with them. Turned them out some, added more B12, drank a beer, compresses air out the excess B12, started turning again. They came out just fine.

13. Buttoned everything up, fired it up and drove a few miles. Everything seems to be working great...even seems to run and idle better.

14. I am one RELEIVED and HAPPY Navi owner.