4.6 to 5.0 swapp

[Stang5o84]

I'm sure that this has been asked so if someone could kindly point me to the correct thread, that would be greatly appreciated. My 2011 4.6 with 140k miles, the engine just started knocking, and I have identified it as a connecting rod (I think). After researching these motors, I found that the Quality Control was not good with these motors, and many experience the same issues at similar millage. Instead of putting back a junk yard 4.6, I was wondering if anyone has ever done a 4.6 to 5.0 swap, and what it all entails. Mainly, would my 6 speed transmission bin. profile be able to work with the 5.0 (assuming it bolts right up). I tune my Saab vehicle with open source software, so I am familiar with the ECU side of things, but I'm just wondering if this is possible or not. Thanks in advance for any responses!!!

 

[carguy75]

What was the cause of the rod bearing failure?

From my experience lack of oil changes(or running low on oil) causes the rod bearings to wear on many non-turbo engines with rod bearing issues.

What quality control issue have you noticed that is common on the 4.6 that would cause the rod bearings to fail?

 

[Stang5o84]

What was the cause of the rod bearing failure?

From my experience lack of oil changes(or running low on oil) causes the rod bearings to wear on many non-turbo engines with rod bearing issues.

What quality control issue have you noticed that is common on the 4.6 that would cause the rod bearings to fail?

I don't know for sure that it was a rod bearing oh, I just know it's something with cylinder for because when I unplug the fuel injector the sound pretty much goes away and the quality control issues are you look online and dozens and dozens and dozens of people have the same story

 

[carguy75]

I don't know for sure that it was a rod bearing oh, I just know it's something with cylinder for because when I unplug the fuel injector the sound pretty much goes away and the quality control issues are you look online and dozens and dozens and dozens of people have the same story

I have researched the 4.6 V8 and have not found much information about any common issues with the 4.6 V8. High mileage engines can fail for a number of reasons mainly based on poor oil maintenance due to long recommended oil change intervals which just allows the engine internals to prematurely wear soon after 100k miles. However, some engines does have common defects that can occur regardless of how well maintained the engine. I have not read about any for the 4.6 V8.

The only Hyundai V8 engine with a common issue I read about was the 2012 5.0 engine with defective piston rings.

 

[Stang5o84]

I don't know for sure that it was a rod bearing oh, I just know it's something with cylinder for because when I unplug the fuel injector the sound pretty much goes away and the quality control issues are you look online and dozens and dozens and dozens of people have the same story

I have researched the 4.6 V8 and have not found much information about any common issues with the 4.6 V8. High mileage engines can fail for a number of reasons mainly based on poor oil maintenance due to long recommended oil change intervals which just allows the engine internals to prematurely wear soon after 100k miles. However, some engines does have common defects that can occur regardless of how well maintained the engine. I have not read about any for the 4.6 V8.

The only Hyundai V8 engine with a common issue I read about was the 2012 5.0 engine with defective piston rings

I agree with you that poor oil maintenance will cause these problems, however when you look around at the number of people on the internet with blown engines and then how quickly Hyundai ran out of factory replacement engines leads me to believe that these engines are crap, Hyundai Genesis owners are not the only owners that run with some dirty oil every once in awhile, no other engine I've ever heard of has these problems due to dirty oil and I change my oil every 3000 Miles probably more than I should have

 

[carguy75]

I agree with you that poor oil maintenance will cause these problems, however when you look around at the number of people on the internet with blown engines and then how quickly Hyundai ran out of factory replacement engines leads me to believe that these engines are crap, Hyundai Genesis owners are not the only owners that run with some dirty oil every once in awhile, no other engine I've ever heard of has these problems due to dirty oil and I change my oil every 3000 Miles probably more than I should have

You are making some strong statements. The problem is that I am not seeing what you are describing as an well known problem on the internet about the 4.6 engine. However, it is possible that the 4.6 does have weak points addressed in the 5.0 engine.

Many engines from various automakers have faults that appear as the engine obtain mileage. Even the king of reliability "Toyota" put out some bad engines as well that need to be replaced under warranty or have issues when the warranty expires. Example being the old Toyota 2.4 engine with common head-gasket(or head bolt) issues.

Note: Dirty oil alone is not what kills an engine. Longer oil changes means that some engines run low on oil due to oil consumption before the next oil change. Especially high mileage engines with poor seals and older PCV valves. The bearing issues usually happens after 100k miles like most other major engine problems related to longer oil change intervals or just plain neglected engines. After 100k miles; the wear from running low/dirty oil finally put the engine parts out of spec and then failure soon after if not before.

The best way to tell if an older engine has worn rod bearings without a tear-down would be to hook up a manual oil pressure gauge and see if the oil pressure is running low. If so, then the engine rod bearings are probably not good. It also could mean leaky seals, but for simplicity an engine with low oil pressure will need work.