Maximuz
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This is the list that the seller did so far. manifold gaskets 850$Spark plugs are a major problem if they have never been changed. They tend to break off in the head. This happen enough that there is a special tool made just for removing the broken plug.
Do you know the maintenance history for the engine, this would be important?
You might want to watch some of the videos by this guy when he covers the Ford 5.4L 3V Triton engine that you have. Specifically when he talks about these items.
Roller Followers
VCT
Timing Chain
Chain Tensioners
Thank u for your insightMay be.
2007 Navigator will have a 5.4l 3v engine. The issue of the 2 piece spark plug breaking was changed for all 5.4l 3v engines bult after 10/9/07.
If he seller supplies you with a picture of the warranty decal (The decal on the driver door post with the VIN) or you can look at it there will be a date code in the upper left corner. It will only give month and year. Many times the sticker is mounted sideways.
If after that 10-07 then you are good. Or if before ask if the plugs have been changed.
I have an 06 Navi. I have replaced all the plugs two times. ON the initial change I broke two. Extracted one with a $50 tool set. And paid a shop $180 to extract the other. All subsequent times have been no problems as it is a matter of using a very high temp anti-sieze and replacing plugs every 50,000 miles versus the factory recommendation of something like 75K or more.
Action
Does 07 have air suspension or coil spring?Oh my guess on the above work the seller states they have done.
My guess is there was a fair bit of over repair. Likely chasing an issue that was not diagnoses, just parts were thrown at it. That is OK if you have a lot of money.
These are really very good vehicles if they are well maintained. Because there is not a lot of maintenance (unlike cars of the 70s and earlier) many owners forget to do any maintenace other than change the oil. Should last you to triple the current mileage or much more. My 06 looks like a new used car and has close to 200k on it
Action
The seller actually nicely dropping off the car to my house today i knownits def a buy for that price and mileageOh my guess on the above work the seller states they have done.
My guess is there was a fair bit of over repair. Likely chasing an issue that was not diagnoses, just parts were thrown at it. That is OK if you have a lot of money.
These are really very good vehicles if they are well maintained. Because there is not a lot of maintenance (unlike cars of the 70s and earlier) many owners forget to do any maintenace other than change the oil. Should last you to triple the current mileage or much more. My 06 looks like a new used car and has close to 200k on it
Action
@Action
Wow, Action, where did you find that info ? Mine had the latter style plugs, so I didn't have any problems. But I would hope so since it's a 2008 model, but it was built in 10/2007.
View attachment 14088
All of the above modular engine issues mentioned above have always scared me after I bought my NAVI. Those are real issues. You can search the net and find these issues and the repairs for them rather easily.Roller Followers
VCT
Timing Chain
Chain Tensioners
Oh come on, surely you have been down a few rabbit holes in your life ???And many people will take me on (or disagree in a big way) for the oil quality. That is OK with me. I will not debate this issue.
Now that took some careful reading! Just noticed that you are some kind of a STAR at the FORD technical center that issues TSB's, I noticed YOUR NAME in the TSB !Data came from Ford TSB 08-7-6.

So got the car yesterday , not the best exterior and interior , missing running board , gave me spark plug motorcraft and need to hire someone to replace that , front bumper tied up with zip tie , no engine light just tpms light on since one of the wheel using non original wheelAll of the above issues mentioned have always scared me after I bought my NAVI. Those are real issues. You can search the net and find these items very easily.
What I have come to realize (it is just a guess) is the engine could be prone to these items. But not all engines will have these issues. My only explanation as to why not every engine has these issues comes to maintenance. That is the only reason I can come up with as for why some engines have issues and others do not.
My recommendation would be do not overextend oil/filter change intervals. ALWAYS use the recommended oil weight. Buy a good quality oil that meets the API service classification for the engine. I no longer believe the oil quality is the biggest factor as the other items mentioned. And many people will take me on (or disagree in a big way) for the oil quality. That is OK with me. I will not debate this issue. In my opinion, if the oil is changed very regularly and is the recommended weight, my opinion is the API service classification takes out the quality question.
And that kind of sums up a lot of things about used vehicles in general. Don't really care how many miles on a used car. If it has been well maintained that is what I seek in a used daily driver. Well maintained beats low miles every day in my opinion.
Actio