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Kevin08

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I just bought my 08 Expedition. It’s build date is September 07. But the wild card really is that the previous owner had the motor changed about a year and half ago and supposedly it has about 40k miles on it now. I don’t know the source of the engine or if it had any of the upgraded or tsb recommendations or if it’s all stock to an early build 08. I’m swapping transmission now but after that I want to figure out if it has the bad roller followers, leaking gasket timing chain tensioner. To make it last another 10 years do I do a timing chain kit with all upgraded parts and high volume oil pump, or just change every 5,000 with Mobile 1 5-30 & motorcraft filter and pray it gives me a good long life?
 

riphip

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I just bought my 08 Expedition. It’s build date is September 07. But the wild card really is that the previous owner had the motor changed about a year and half ago and supposedly it has about 40k miles on it now. I don’t know the source of the engine or if it had any of the upgraded or tsb recommendations or if it’s all stock to an early build 08. I’m swapping transmission now but after that I want to figure out if it has the bad roller followers, leaking gasket timing chain tensioner. To make it last another 10 years do I do a timing chain kit with all upgraded parts and high volume oil pump, or just change every 5,000 with Mobile 1 5-30 & motorcraft filter and pray it gives me a good long life?

Is only labor and gaskets, etc small parts if not. Parts pricing, unlike quality, is not going to get cheaper. You are not depending on it at present.
If mine, like my 2004, I would try to check everything I could. Family shares mine also. First thing I did was brakes, tires, any possible engine problems while I was not immediately using it before it went on the road
 
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