My 2013 Boss' 1.5 month long "BBQ Ticking" Story - Page 3 - Ford Mustang Forum
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It doesn't exactly float you don't know what your talking about lol. Clearances is controlled leak it's not trapped there like oil is in hyd cyl . Then how does engine that never shut off wear the bearings at 80 psi of oil pressure . But believe what you want but I do this for a living.

FYI human hair measures .002-.003 on avg
Depends on nationality...................

Yes, pressure lubrication is a controlled leak, what regulates that film of oil to float the crank is bearing clearance, two much clearance and you can't regulate that film, you are then metal on metal and you see scuffing. The crank in the picture shows signs of scuffing. How do you know that I don't do this for a living too...............................?


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Depends on nationality...................

Yes, pressure lubrication is a controlled leak, what regulates that film of oil to float the crank is bearing clearance, two much clearance and you can't regulate that film, you are then metal on metal and you see scuffing. The crank in the picture shows signs of scuffing. How do you know that I don't do this for a living too...............................?

It's not scuffing it's smooth not rough.... PLUS theres no pic of the crank journal. If you want pics of scuffed bearing looks like I have some at work.

The way you saying it engine should nothing wear out everything rides of cushion of oil. So why are we taking engines off line after certain number of hrs that are never shut off. (note the have 2 oil systems so oil change engine doesn't have to be shut down) showing wear from bearings, liners, gear and valve train even oil pump gears

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@TheJMan48

Sorry I need to update my profile. I've moved to the Bay Area since joining. I took it to Towne Ford in Redwood City.

@Sharad

Never road raced it but I don't treat it like a princess either. Does your builder know what the weak point is with these motors? Any pattern with how they're blowing up?
That is excellent that you moved here, because that means your dealership that responded to this being a real problem is not in another state.

How is the new shortblock treating you?
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Interesting. I dont see any 2011's posting. Maybe doesnt happen with them?

2011 GT auto, 40k miles, mild tune
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Depends on nationality...................

Yes, pressure lubrication is a controlled leak, what regulates that film of oil to float the crank is bearing clearance, two much clearance and you can't regulate that film, you are then metal on metal and you see scuffing. The crank in the picture shows signs of scuffing. How do you know that I don't do this for a living too...............................?
This is the best explanation of crankshaft to bearing fuction I've heard by far. Yes the crankshaft does ride on a wedge of oil a film controlled by clearence and a direct derevative of oil pressure. Without that film or wedge which ever the term one likes to use, the engine would experience detrimental issues. On most new engines these clearences are as low as .0001-.00013. To me that is still too tight which in the end gives higher temps greater chances for the oil film to deteriorate, which in turn gives more metal to metal contact. Fact the manufactures have gone to a thinner oil to improve their cafe standards. Giving an engine that will last till their warranty under normal use. But fall short if used as we most use our cars, to have fun with. I would love to see a mechanical gauge being used. When I had my ZO6 it had an oil temp reading as the oil temps increased the oil press dropped. Im willing to bet thats also happening to some extent with the 5.0. Most guys switched to better oils to help relieve this problem, it didn't solve it completetly but did reduce it.

Last edited by rob47v; 12-22-2014 at 09:30 AM.
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Thank you, for the compliment, I was a former GM ASEP engines trainer. I was brought up in my Dad's Tool and Die business, I was standing on a box operating a Bridgeport mill when I was 10 years old.

I LOVE doing engines, it IS all about the clearances, squareness, parallelism, fits and tolerances, just basic machining principles

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Your very welcome, it just made scene too logical. I'm in the hunt to perform an engine swap on my 2011 from the 3.7 to the 5.0. Just purchased an engine this pass week, and looking at all the issues with this beast at lest limiting issues. Fact there are many running these 5.0 with no issues to boot. Some mightbe saying why would you do something that crazy. Simple the 3.7 tho a good engine has its limits, and very little after market support, a necessary factor as we all know. You can't build the 3.7 beyond 500 hp safely, some that have tried have lost all. The engine has unsupported chambers, good design for reducing production cost, but it leaves a limited Hp capable engine. This was confirmed to me by Livernois Performance. They took care of the issue with the 3.5 ecoboost by building upper cylinder support plates, which is a good fix the correct fix . But do not offer this with the 3.7, they say that there isn't much call for that motor. Petty this little engine had such potentials. The swap has already been done on a 2011 ranger so I know is doable just a bit costly. But I'm on my way already have the exhaust, harness and ECU lined out. I'm just lacking flywheel, mounts,and either change the trans, or the fwd trans body of the MT82. Wish me luck is going to be a hell of a trip. The hardest thing I'm going to encounter I think will be recoding the ignition key to the new ECU.
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You most definitely will need the engine portion of the harness as well as a PCM. I would start searching for 5.0 wrecks, I'm sure sensor connections will be different. If the swap is done with all stock pieces, it should be indiscernible. You will however cause some Tech some day to scratch his head when he runs your VIN! In a year or so I'm looking for a 3.7L Premium for wifey, she loves her autos. She has driven the BOSS but hated the stick. She had an '01 BULLITT GT but never drove it due to the stick.

Definitely drop your motor from underneath, I did a '98 Z-28 Camaro in 2 hrs with a buddy, unconventional drop method but it worked well.

Yes, I'm a VA hillbilly!


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oh yea!! Now that's what i call progress!!!! Hey my wife and I have property in Tennessee, almost neigbors. What a small world. LOL!!!!

Last edited by rob47v; 12-22-2014 at 10:22 PM.
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This is the best explanation of crankshaft to bearing fuction I've heard by far. Yes the crankshaft does ride on a wedge of oil a film controlled by clearence and a direct derevative of oil pressure. Without that film or wedge which ever the term one likes to use, the engine would experience detrimental issues. On most new engines these clearences are as low as .0001-.00013. To me that is still too tight which in the end gives higher temps greater chances for the oil film to deteriorate, which in turn gives more metal to metal contact. Fact the manufactures have gone to a thinner oil to improve their cafe standards. Giving an engine that will last till their warranty under normal use. But fall short if used as we most use our cars, to have fun with. I would love to see a mechanical gauge being used. When I had my ZO6 it had an oil temp reading as the oil temps increased the oil press dropped. Im willing to bet thats also happening to some extent with the 5.0. Most guys switched to better oils to help relieve this problem, it didn't solve it completetly but did reduce it.
Oil does thins out when it hot. Some manufactures run oil temp hotter than coolant by 30 degs. Why because it pumps easier less power lost. Oil film yes crank still doesn't exactly ride on cushion of oil. Everytime cyl fires that oil is pushed out of the bearing. If you crank oil pressure really high it will also wash bearings out make them flake and come apart. Oil is coolant for bearing taking heat away so bearings won't seize. Like I said before how does engine that's never shut off wear out? According to some everything rides on wedge of oil so in theory it should never wear out
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Oil does thins out when it hot. Some manufactures run oil temp hotter than coolant by 30 degs. Why because it pumps easier less power lost. Oil film yes crank still doesn't exactly ride on cushion of oil. Everytime cyl fires that oil is pushed out of the bearing. If you crank oil pressure really high it will also wash bearings out make them flake and come apart. Oil is coolant for bearing taking heat away so bearings won't seize. Like I said before how does engine that's never shut off wear out? According to some everything rides on wedge of oil so in theory it should never wear out
Well you mentioned it heat! It is a wear factor. For engines under normal use, shutdown and startups, its the most detrimental part of any engine. If you see it as oil to help sliding of the crankshaft contact to the bearing surface, I see it as the same a film of oil of which the crank rides in. As someone stated if you put oil on the floor you will slide wright off. That's the film of oil whether is whisking to slide or film. I see it as the same. If it wasn't a film then the oil on the floor serene wouldn't be as so!!
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Well you mentioned it heat! It is a wear factor. For engines under normal use, shutdown and startups, its the most detrimental part of any engine. If you see it as oil to help sliding of the crankshaft contact to the bearing surface, I see it as the same a film of oil of which the crank rides in. As someone stated if you put oil on the floor you will slide wright off. That's the film of oil whether is whisking to slide or film. I see it as the same. If it wasn't a film then the oil on the floor serene wouldn't be as so!!
I see as a film of oil not wedge or exactly riding on wedge of oil. That flim help crank slide there is still some contact but it doesn't get hot because oil is taking heat away. There reason why I say this way after having long talk have oil engineer with engine program. Most don't see oil as coolant it cools bearings, crank, rods, pistons, camshaft, valve train, gears or timing chain.

Seems no one can explain how engine that's never shutdown in tell they take it off line for rebuild can wear out.
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You most definitely will need the engine portion of the harness as well as a PCM. I would start searching for 5.0 wrecks, I'm sure sensor connections will be different. If the swap is done with all stock pieces, it should be indiscernible. You will however cause some Tech some day to scratch his head when he runs your VIN! In a year or so I'm looking for a 3.7L Premium for wifey, she loves her autos. She has driven the BOSS but hated the stick. She had an '01 BULLITT GT but never drove it due to the stick.

Definitely drop your motor from underneath, I did a '98 Z-28 Camaro in 2 hrs with a buddy, unconventional drop method but it worked well.

Yes, I'm a VA hillbilly!

That's one way to get engine out LOL
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I see as a film of oil not wedge or exactly riding on wedge of oil. That flim help crank slide there is still some contact but it doesn't get hot because oil is taking heat away. There reason why I say this way after having long talk have oil engineer with engine program. Most don't see oil as coolant it cools bearings, crank, rods, pistons, camshaft, valve train, gears or timing chain.

Seems no one can explain how engine that's never shutdown in tell they take it off line for rebuild can wear out.
I stated it as wedge cause some technical statement are as so, they define it as a wedge of oil, but a film is actually more correct or easier to comprehend . But there isn't and shouldn't be any contact or at lest very minimal. This is man made there will be some flaw. Wear is inevitable no one can escape it. I really don't think that the issues with the ticking or knocking which is plaguing these engine from what I'm reading is do to bearing clearances. Specially with the engine I just pickup for my swap. It ticks when its cold but quiets down once warm, or more correctly stated at ops temp. Usually from my experience, if its mains the noise remains, or should I say bearings cause its more pronounced with rods than with mains. Now valve train noises usually get quiet or the decibels are reduced once the oil warms up and thickens. Thats what's happening with my engine the noise quiets down almost unnoticeable one the engine is at ops temp. That leads me to believe it to be valve train not bearings. What say you????
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Wedge of oil is misleading but oil leaks (controlled)all the way the bearing not at the top. Valvetrain noise doesn't just change with oil temp but alum expands when under temp. My 04 mach 1 was quiet when hot had slight tick. Oil thins out when hot

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