Who did the thread repair for you---DIY or the shop you mentioned earlier?

Second plug change. 196,000 miles
 

Did my second Plug change this weekend.

Eight years, 90,000 miles and one plug blowout later. 196,000 miles on this thing.

I am getting ready for a 5,000 miles to Colorado over the Continental divide in this 11 year old truck. So a plug change is on order.

The plugs look pretty good. One bank plugs 1-5 look to be running a tad richer than the other. Some minor deposits on the plugs on that side.

The gap has opened slightly on a couple. Still within tolerances.

The plug in the cylinder with the time-sert looks just like the other nine. Bore scoped all the threads. It is difficult to identify the cylinder with the time-sert. Looks the same as the others.

Changed the air filter. Went back to a Motorcraft filter. Mileage jumped to 16 mpg on highway from 12.9. The Motorcraft filter breaths better than the *&&^% Fram I was running.

About ready to go. Need to rotate tires, inspect brakes and I will be done

Plugs 1-5

https://www.ford-trucks.com/forums/p...ictureid=99961



Plugs 6-10

https://www.ford-trucks.com/forums/p...ictureid=99962

I did the repair myself.

I did a post on this forum with what I did with photos.

With one bank being leaner than the other does that mean you need new oxygen sensors? Doesn't each inboard O2 sensor control the mixture for that bank?

My father in law is a Master Mechanic.

According to him the answer is yes and no.

If there is a significant problem in the Oxygen Sensors then it will throw a code. These things switch constantly between rich and lean. If they switch too slowly then the computer will throw a code. He does not change the sensors if there is no code.

There is not much difference in the two banks. Could be normal tolerance. Runs good. Fuel mileage is where I expect it to be.

Likely I have one leaking injector. One cylinder is worse then the others. I am considering replacing that injector.

The diaphragm on the fuel pressure regulator could have a tiny leak. It vents into the side where the plugs are rich. I plan to check vacuum hose for fuel.

Could be a small vacuum leak some where.

I am going to go over it again this weekend looking for such things. It is not causing a problem and the difference is slight so I might just leave it alone and keep an eye on things.

Don't fix it if it is not broke is my policy.

Way back before most of you we're born ... The mechanics and engineers developed a substance for working on the engines that were life or death for many people and our total world of free people. This substance was called " anti seize compound" and was used on very large radial engines on ever bomber air craft in World War Two to allow plug changes and speed up getting the plane back into the air for the next mission. We did in fact win the war. Anti seize and WD-40 helped. Use the Stuff as it does work.
Just a bit of info for you on why it was made. Regards, John

I use Antifreeze on all plugs or bolts into Aluminum. Learned that a long time ago on Boat Motors and Motor Cycles. Carried it forward to modern Autos.

Tmehrkam ,


Nice to hear from you . Just curious , do you still have the V-10 and the trailer ? are you still travelling ?

Yep the V10 is my daily Driver. Have the 30ft travel trailer and go out once a month in it. My commute went from 36 miles a day to 10 so the miles are not climbing like they once did.

Next trip is tomorrow.