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Old 05-30-2013, 03:49 PM   #71
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i had a similar issue. it took ford about 2 weeks to replace it. You should see the parts list that were replaced LOL.
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Old 05-30-2013, 06:51 PM   #72
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Originally Posted by Vuj311 View Post
i had a similar issue. it took ford about 2 weeks to replace it. You should see the parts list that were replaced LOL.
As in you melted a piston as well?
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Old 05-30-2013, 07:17 PM   #73
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Originally Posted by hixsonaf View Post
I'm running a Steeda CAI and the FSWerks stealth exhaust. I noticed a tapping in the valve train as soon as I installed the Steeda CAI at low Rpm high torque loads. Went and did an auto cross day at a local track and got six runs in before my engine started rapping like a diesel. Made it half wat home and it died. I checked the oil and she was bone dry. The dealer tore it apart and found that it melted part of the drivers side piston. Their best guess is that the injector hung up and dumped fuel into the cylinder. It bent all 4 valves. Ford is covering it under warranty and I am getting a whole new long block.
Not being a ass but glad I'm not the only one that did this lol
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Old 05-30-2013, 07:21 PM   #74
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The Dealer does my oil changes. I bought the maintenance package when the car was new so I just let them deal with it. So to answer your question my car has only ever seen motorcraft filters and motorcraft oil. No serious performance mods to require any special oil.
Me to....makes me not trust my dealer now
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Old 05-30-2013, 07:29 PM   #75
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Ok I'm gonna chime in on the cause of why mine started knocking cause I have friends that work at ford.on mine the clamp that holds the cam was to tight and wore into the camshaft causing metal shavings,after a while caused a piston to hit the side and that was it,and mine in modded minus the header at the time and they covered it.the service desk gave me a couple reasons why it blew(which were all dumb)and the actual mechanics told me of the shavings and showed me a v8 from a f150 that did the same thing.
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Old 05-30-2013, 09:00 PM   #76
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Originally Posted by hixsonaf View Post
I'm running a Steeda CAI and the FSWerks stealth exhaust. I noticed a tapping in the valve train as soon as I installed the Steeda CAI at low Rpm high torque loads. Went and did an auto cross day at a local track and got six runs in before my engine started rapping like a diesel. Made it half wat home and it died. I checked the oil and she was bone dry. The dealer tore it apart and found that it melted part of the drivers side piston. Their best guess is that the injector hung up and dumped fuel into the cylinder. It bent all 4 valves. Ford is covering it under warranty and I am getting a whole new long block.
Been watching/reading this thread and it's time for me to open my big fat mouth.

After installing the Steeda CAI a tapping in the valve train was heard (the intake would not cause this damage but may let a noise easier to be heard) at low R.P.M's high torque. What does "low R.P.M's high torque loads" even mean? If it's a manual I call that "lugging" and that's bad for an engine. If it has the DDCT, it won't let it be "lugged", even in SelectShiift mode.

Then after hearing the "tapping in the valve train...at low Rpm high torque loads" it the then went to the track. Nuff said.

ASSUMING the oil was full before the six runs at the track, WHERE did the oil go??? A hole in the block, dumping it on the track? Burning it like a freight train?

If an "injector hung up and dumped fuel into the cylinder" several things can happen. One of which is fuel dilution in oil due to fuel getting past rings. Another could be hydro-lock damaging connecting rod. Either one will not cause bent valves.

My best GUESS is the engine was run low on oil to begin with. Engine ran hot, the variable valve timing system, which needs oil pressure to operate, was not getting the oil so the valve timing was off (I believe the variable cam timing, intake and exhaust can vary 30 degrees on this engine) and made contact with piston.

Any thoughts on the above? As long as it's civil response, I can take it.
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Old 05-30-2013, 10:41 PM   #77
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Been watching/reading this thread and it's time for me to open my big fat mouth.

After installing the Steeda CAI a tapping in the valve train was heard (the intake would not cause this damage but may let a noise easier to be heard) at low R.P.M's high torque. What does "low R.P.M's high torque loads" even mean? If it's a manual I call that "lugging" and that's bad for an engine. If it has the DDCT, it won't let it be "lugged", even in SelectShiift mode.

Then after hearing the "tapping in the valve train...at low Rpm high torque loads" it the then went to the track. Nuff said.

ASSUMING the oil was full before the six runs at the track, WHERE did the oil go??? A hole in the block, dumping it on the track? Burning it like a freight train?

If an "injector hung up and dumped fuel into the cylinder" several things can happen. One of which is fuel dilution in oil due to fuel getting past rings. Another could be hydro-lock damaging connecting rod. Either one will not cause bent valves.

My best GUESS is the engine was run low on oil to begin with. Engine ran hot, the variable valve timing system, which needs oil pressure to operate, was not getting the oil so the valve timing was off (I believe the variable cam timing, intake and exhaust can vary 30 degrees on this engine) and made contact with piston.

Any thoughts on the above? As long as it's civil response, I can take it.

Oil was burned,

"The dealer tore it apart and found that it melted part of the drivers side piston"

I had a hole in a piston that was discovered because of regular oil checks.

By all accounts of people with "bad" dct transmissions act like manuals being driven badly.
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Old 05-31-2013, 09:12 AM   #78
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Oil was burned,
I dont doubt that but it was from excessive Cyl temps

"The dealer tore it apart and found that it melted part of the drivers side piston"
There is only one thing that will burn the tops of a piston , excessive Cyl temps , this can only be caused by a lean condition or excessive timing , timing is so well regulated and has a good knock sensor so I rule out timing and it goes back to a lean condition

I had a hole in a piston that was discovered because of regular oil checks.
Altho you/they may of found this when a oil check was done oil has nothing to do with a burned piston and low oil will not cause a burned piston

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Old 05-31-2013, 09:22 AM   #79
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Your right Tom never check your oil. There is in no way any benifiet to doing so, it certainly wouldn't show potential internal engine problems. Everything you say is dogma
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Old 05-31-2013, 09:26 AM   #80
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Quote:
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I had a hole in a piston that was discovered because of regular oil checks.
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They said a piece broke off of the bottom of the piston and exposed the rings. It could have just been cracked on the top. I didn't acuually see the damage but that's what I was told. The engine ran fine until it was removed. Had a bit of a rough idle and made an odd noise but power was normal and I was still getting 35mpg. I'm looking forward to seeing how a properly working engine performs
I don't believe your case is related to the OP's burned piston. A broken piston skirt causing oil control ring leakage is nothing like a piston with a hole burned through it, and far less catastrophic.
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