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GuardEcoBeast
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How does the melted cylinder look? What about the crank?
1320INC
Well-Known Member
- Thread starter
- #50
Id like to retract my " crank is fine statement". like i said, im not sure what the machining tolerances are on any of these parts. Crank will need turned for sure. Under better light and cleaned up it has some signs of lack of oiling. Not sure i understand the piston oil squirters. If you block them off wouldnt you be able to create more oil pressure that coats everything rather than the area they are aimed at?
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GuardEcoBeast
Well-Known Member
That is true, but the piston squirters are also used to cool the piston.
GuardEcoBeast
Well-Known Member
Its common to do a balance shaft delete on these engines.
GuardEcoBeast
Well-Known Member
Correct
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GuardEcoBeast
Well-Known Member
1320INC
Well-Known Member
- Thread starter
- #57
Well after having some conversations with people who know more than me i have determined that my original engine suffered from a multitude of issues causing its demise. The main issue being Low Speed Pre Ignition or LSPI. The damage and subsequent tear down pics show this. The faulty pcv system that should have been replaced by the previous owner was also a huge factor. It allowed more oil deposits to enter the combustion chamber, these oil deposits contributed to the LSPI condition. The quality of the oil and frequency of the changes were also to blame. It has been proven that oil with high levels of certain detergents will cause detonation in the combustion chamber no matter how much timing is pulled. Being a small turbocharged direct injected engine also contributed to the demise. Also last but certainly not least, the quality of the pistons in these engines limit their ability to handle pre-detonation or full on detonation.
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Cardude99
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- Joined
- Feb 14, 2016
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- First Name
- Sam
- Vehicle(s)
- 2018 Ecoboost
Would the low side pressure sensor that has been recommended iniother threads have prevented this or no? I ask cause I am getting the itch to tune but this is why I am scared to do so.
1320INC
Well-Known Member
- Thread starter
- #59
The low side pressure sensor would have absolutely nothing to do with this. I say that with confidence because I am still running the same low side pressure sensor that was in the blown motor, just as a little theory i have. I dont believe that tunes are hurting these motors. Its just the general design of them. Being a turbo charged direct injection motor creates enough of a challenging task. Ford thought that pulling timing out would protect this engine. Unfortunately the low speed pre ignition was not on fords radar. Even with the best fuel and the most conservative tune, this is still happening. The oil sits above the top ring and creates the pre-detonation. Like i previously stated, the " wal-mart" pistons ford chose are an absolute travesty. After having them in my hands, yes, they are subpar for anything other than a naturally aspirated 9-1 engine.
1320INC
Well-Known Member
- Thread starter
- #60
Replaced the driver rear hub (had an abs, tract control, no cruise etc) anyway its swapped out and lights are off and everything is working as it should. Those little thrust washers only job is to keep the dissimilar metals from seizing onto each other. Axle puller tool actually pulled old hub in 2. Other side was seized onto spindle.
All fixed and now loading my 91 octane Palm Beach Dyno tune on it.
All fixed and now loading my 91 octane Palm Beach Dyno tune on it.
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