GT Pony
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You nor anyone else here unless they work for Ford directly related to the tick investigation knows how they conducted their investigation into the ticking issue. If they really don't "know" what's causing it, then they need some in depth engineering investigation. Like said, I'm betting they know exactly what the cause is, and that's why they came to the "conclusion" that it's a "normal characteristic" and not harmful ... releasing a SSM saying so. But the thing is, not all Coyote engines tick, so there is a reason for that. What else would it be beside mechanical differences during production.So they get 100 engines back with the tick. They tear them down and find nothing out of spec. They put some of them back together and run the torture test. All pass and still tick. They get torn down and they find nothing out of spec
They get 25 more back and run them through the test. All pass they tear them down and find nothing out of spec.
They declare the tick a normal operating characteristic of the engine.
I do know the above has happened with a different manufacturer.
Could very well be that if the rod side clearance is on the maximum side of the range it could be a ticker. I'm betting when Ford slaps engines together they don't check the assembled short block side clearance on every rod and crank journal bearing. Probably don't even check the dimensions on every individual rod, crank, block, etc produced. More like random checks, which could let a lot of unchecked parts into production.
Excessive side clearance won't cause any harm, and that's another clue in the mystery. If it was caused by something that caused harm, Ford would have done more than put out an SSM that said it's a "normal characteristic" ... on some engines, but not all. Why only on "some" ... there's a reason it's only on some, and not with all of them either ticking or not.Think about, if it were a rod clearance they would make an adjustment to the machining process. Management does not like complaints.
Whatever it is they can't fix it and it causes no harm to the engine.
Fact still remains that changing the friction level of the oil effects the tick ... so think about why that's happening.
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