2017 3.5 Ecoboost Timing Chain or Wastegate Rattle?
- Thread starter wreedsvt
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rtmozingo
FRF Addict
So you had this issue with recommended oil?
Ford has fought this issue since the Triton...and some of us have over 60k miles without the issue. I've got 20 myself and my truck seems to be fine.
A guy I know that had it done earlier this year said the new parts were supposed to land in late July
rtmozingo
FRF Addict
Boo. Curious as to everyone's build date
wreedsvt
Full Access Member
I always used Morotcraft oil in my 5.4, sold it at 100k and never went to ford service once. Thought I was treating this truck better by giving it Mobil 1, maybe so learned a lesson, but who knows, I seriously doubt the oil caused the failure.
Quaesta
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Did this start off quiet and then get louder? Did it do it with both remote and key start?
If it’s rattling for more than a few seconds after startup it’s because the phaser isn’t pressurized enough to run in the desired/clocked position (internal tolerance issue), the chain has stretched far beyond what the timing chain tensioner can handle, the timing chain tensioner has failed or system oil supply pressure is simple too low to handle all the loads and passages. On the 5.4s the heads were lubricated downstream of the timing circuits. With the engine oil at running temperature the measure of a 5.4s future was to tap into the block and read the main bearing oil pressure, less than 25 psi = toast. I had this exactly same noise on my 5.4, failed tensioner seal, smoked main, cam shaft bearings and all journal surfaces were scored. Idle was 18# psi hot with 24,000 miles.
The replacement Jasper engine had an aftermarket, high volume oil pump and it ran 100k hard towing miles with a 10k boat, 10% towing miles. Jaspers suspicions were the factory aluminum backing plates of the oem oil pumps bending away at high rpm and starving the engine at power. Jaspers aftermarket pumps had steel backing plates. Ford ran those aluminum backing plates until the very end which tells me they never figured out the 5.4 problems.
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The replacement Jasper engine had an aftermarket, high volume oil pump and it ran 100k hard towing miles with a 10k boat, 10% towing miles. Jaspers suspicions were the factory aluminum backing plates of the oem oil pumps bending away at high rpm and starving the engine at power. Jaspers aftermarket pumps had steel backing plates. Ford ran those aluminum backing plates until the very end which tells me they never figured out the 5.4 problems.
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I think I know this one! Just went through it It is the timing chain. Could be the timing chain guide has broken. That's what happened to me. This will get worse until the valve timing gets so far off the the check engine light goes on and the truck starts running poorly. You need to get this fixed right away! It should be a warranty job. They had my truck for 3 1/2 weeks to do it.
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I’d like to see these problems by geographics. Is it mostly happening to trucks exposed to long durations of stop n go under intense heat? Southeast? Let’s say the oil hovers around 250° then it shuts off.
Secondly, don’t the Porsche H-6 engines run a single chain? Those seem to last forever, even under track use. It would be interesting to see the two chains side by side, vendors, cost, material selection, etc.
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rtmozingo
FRF Addict
I actually queried the facebook group on this, no response. I'm in Texas, use stop and go frequently, and have had no indication of this issue at 20k miles.
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