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Old 01-13-2014, 01:47 PM   #51
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Originally Posted by HunterSmitty View Post
There has obviously been no epidemic of EB's blowing up, but I would say Watt-Maker is correct in saying those have mostly been 2011s.
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Let's temper the widespread issue
I never indicated there was any widespread issue. In fact I said the exact opposite.
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Old 01-13-2014, 01:54 PM   #52
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I never indicated there was any widespread issue. In fact I said the exact opposite.


That was my point. You have no proof of it not being widespread..You can't base that on forum posts. Only FORD has the accurate data to the warranty/no warranty work being done on there trucks. I would assume the fact that Chris has stated there putting a beefier timing chain on compared to stock may say something about the issue..
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Old 01-13-2014, 02:14 PM   #53
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Originally Posted by SkiSmuggs View Post
I appreciate your posts as it certainly helps us for our own preventative maintenance plan. You are in a unique position as you have lots of trucks and put lots of miles on them so you are doing some beta testing for us.
As a result of your posts, I am switching my oil changes from 10K miles to 7500 or 6000 miles and may have my timing chain replaced at 80K miles. I suspect I have a turbo starting to go bad judging by a "hamster wheel" noise when towing uphill and will have the dealer check that prior to towing season this spring.
Thanks again for the heads up.
Ski

I change my ecoboost's oil at 5k mainly due to the gas that gets in it.
Thanks to your experience I will change my spark plugs more often and thanks to the OP for bringing the timing issue to our attention
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Old 01-13-2014, 02:15 PM   #54
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Looking at the timing chain, it's a long one.

Click the image to open in full size.
Yep, they get hot and they stretch just like the chains on my round baler and chain saw.
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Old 01-13-2014, 02:36 PM   #55
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After reading the "chain wear" article this is just more of a reason to change your oil. I can't believe people would run 10,000 miles per oil change, its only 6 quarts of oil in a turbo charged gas engine. The oil gets dirtier and more diluted than a NA motor. You should be changing oil every 3-4000 miles, spend $30 to avoid $13000 down the road.

But this is only my opinion!
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Old 01-13-2014, 02:38 PM   #56
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If stretch is the problem, then I would guess hot restarts or quick engine spin-ups would the culprit...anything that adds inertial loads to valve sprint tension + friction.

I read that during the torture test tear down, the tensioner used up 30% of it's range (Ford was bragging on that). The problem with the torture test is the engine was held at constant rpm for 300 hours and did another ~5k miles dragging logs and towing trailers. The constant rpm test was to simulate 150k miles but it may not really simulate starting and stoping 20 times a day for a real 100k miles.

The next few years will be interesting for sure. I'm glad the OP contacted Ford so they can learn from the real world and adjust accordingly.
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Old 01-13-2014, 02:56 PM   #57
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Thanks for the info Chris74. I'm really curious to see how this goes. Does anyone have access to a system that could identify when part numbers changed? I'd like to know if I have an upgraded timing chain, or I need to reduce my oil change interval. Even though I think these vehicles probably represent a corner case for use, if reducing my change interval by 20% saves me 10% chance of needing a long block, I'll do it.
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Old 01-13-2014, 04:00 PM   #58
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Originally Posted by Ssls6 View Post
Looking at the timing chain, it's a long one.

Click the image to open in full size.
The work order below says it was the secondary chain that broke. That chain only runs between the camshafts on that cylinder bank. The primary chain is powered by the crankshaft and spins one cam per bank. There is another chain that spins the second cam. That's what it says broke.

If you really want to see long cam chains look at the Audi 4.2L V8.
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Old 01-13-2014, 04:04 PM   #59
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The work order below says it was the secondary chain that broke. That chain only runs between the camshafts on that cylinder bank. The primary chain is powered by the crankshaft and spins one cam per bank. There is another chain that spins the second cam. That's what it says broke.

If you really want to see long cam chains look at the Audi 4.2L V8.

The picture and this statement dont seem to add up...
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Old 01-13-2014, 04:09 PM   #60
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Originally Posted by Howler View Post
The picture and this statement dont seem to add up...
The secondary chains are behind the sprockets and not visible. The only part number I have seen gives you a set of three chains, one long primary and two short secondary. Edit, looks like the chains are available separately. 6268 for the long chain, 6268B for the short. http://www.fordparts.com/Commerce/Ca...o=F-150#Search Part numbers given are same 2011-13 but doesn't mean they weren't changed.

Last edited by Truckit; 01-13-2014 at 04:50 PM.
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Old 01-13-2014, 04:09 PM
 
 
 
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