4.4.6l tensioner and guide replacement

[NaviatorinAZ]

I just bought an 04 aviator AWD. 130k miles
Should have done more research, but now have an engine that needs timing chain guides and tensioners. (Changed the oil and found orange chunks and no fine aluminum dust in the oil). Took the oil pan off and the nylon guide from the upper guide/tensioner fell out. Chunks of orange were in pan and screen.

Now. Knowing what lies ahead, must I change the timing chain and cam sprockets along with the guides/tensioners?

The repair computer program shows tensioner r/r being an 8.8hr job but a dual timing chain r/r is a 13.3 hr job in labor.
I've talked to the (non-dealer) mechanic and he seems to believe timing chains rarely fail rather failure comes from letting the tensioners fail thus causing and chain reaction.
Anyone else just opt for the guide/tensioner repair?
Thought the chain comes off to replace the tensioners and guides so I don't understand the 4.5 hr difference in estimated job time?
I would be doing this job myself but injured my back in the service and was medically retired. Can't lean over the engine compartment too long, but also don't want to get screwed out of several hundred bucks.
Thanks for any advice.

 

[driller]

Not saying the chains/sprockets wear out, but this can happen...



You can change the guides/tensioners without the chains/sprockets but most will replace the entire setup.

Ford parts are just fine for a stock setup but make sure you get the steel body tensioners and not the plastic variety.



If you plan to do the work yourself, it can be done in the vehicle and you would be best to opt for just replacing the guides/tensioners. You can get the complete Ford Racing timing kit for around $450 and only use what you need. With gaskets and all you should still be under $500.

If you plan on paying someone for the work, go for the entire assembly and make sure they have the required special tools and are confident in their ability to properly degree the cams. It may actually be advantageous to remove the engine to do the work.

I doubt they could do it in 13.3 hrs but I also doubt I could change the guides/tensioners in 8.8 hours!

 

[NaviatorinAZ]

Thanks JP. Like that lincoln. Just sold my 94. 89kmIles on it.