Rod knock?

[ethanthereal]

I was driving abt 55 and suddenly I noticed a large amount of smoke coming from my exhaust and as soon as the rims hot low it died and when I started it it made some unpleasant noises

 

[ethanthereal]

I was driving abt 55 and suddenly I noticed a large amount of smoke coming from my exhaust and as soon as the rims hot low it died and when I started it it made some unpleasant noises

 

[ethanthereal]

I was driving abt 55 and suddenly I noticed a large amount of smoke coming from my exhaust and as soon as the rims hot low it died and when I started it it made some unpleasant noises

When the rpms got low

 

[mikec]

That didn't sound like rod knock. Rod knock is generally a dull thud sound.

What color was the smoke - white, gray, or black?
White smoke = coolant is getting into the engine via a bad head gasket, bad gaskets around the intake manifold, cracks in a cylinder head or in the block, etc.
Gray smoke = oil burning. Aged piston rings, busted piston rings, scored cylinder walls, etc. Valve seals leaking badly (normally this slowly builds up, you'll get a puff of smoke on startup and then later when idling or decelerating, and eventually it smokes all the time), turbos leaking oil (on turbo equipped engines obviously, not found on Gen 1 or Gen 2 Hyundai Genesis sedans), head gaskets leaking.
Black smoke = running really rich. Fuel injector stuck wide-open, ignition not working on a cylinder, fuel pressure way too high, PCM/ECU gone stupid commanding excessive injector ON time (too much gas again), etc.

Step one: check the oil level on the dipstick. If it's suddenly really low, find out where the oil went. You may have already burned a lot of oil from an internal mechanical issue. Running an engine very low on oil is a sure way to hasten its death. The noise I heard in the video sounds more like a squeak sound... possibly from no oil or too little oil pressure from a failed oil pump or failed pump drive chain inside the engine.

Then check the radiator coolant level. If it is low, where did the coolant go? An overheating engine makes the coolant boil/expand into the expansion/overflow tank initially; after a bit the tank is over-filled and coolant then gets dumped onto the street. An engine with failed gaskets (head gaskets, intake manifold gaskets primarily) or with cracks in the engine block or cylinder heads will let coolant into the combustion chambers and it ends up going out the exhaust pipe as sweet smelling gray smoke. Bad radiator electric fans, bad temp sensors that tell the ECU/PCM to run the fans, etc. can lead to overheating. On older cars (with mechanical fans) a busted fan belt leads to overheating.

Besides checking the oil and coolant levels, tests I'd recommend are:
1: basic compression test. If one or more cylinders are really low (and different from others) then the engine has internal issues. It might be as simple as a sticking valve, or a camshaft out of time with the rest of the engine (on many Hyundai 2.0 liter engines a pin that ties the camshaft to the drive sprocket/VVT mechanism works loose, letting the two parts slip out of alignment. The bolt holding the sprocket and variable-valve-timing mechanism to the camshaft keeps the parts tied together but can't prevent them from slipping out of time), or it could be signs of a far more expensive issue.

2: A "cooling system pressure test" will see if the system has any leaks. Leaks inside the engine itself (gaskets, cracks) generally require a lot of labor hours (=$$) to fix.

Any half-way decent repair shop can do those tests. I wouldn't drive the car to a shop though while it's making such noises. The tools to do those tests are small - many home mechanics have them - so the tests could be done in your garage/driveway. If both were okay, then time to locate the source of the noise. A "mechanic's stethoscope" (it looks like a doctor's stethoscope but it has a long metal rod rather than an audio pickup on the end) touched to various engine parts (engine block, cylinder heads, the body of the water pump, body of the alternator, body of the power steering pump, etc. - things that have moving stuff inside them - but don't touch the actual moving bits!) will pick up all sorts of sounds. It's amazing (and sometimes horrifying!) the sounds a healthy engine makes internally. Anyway, a mechanic's stethoscope will help identify the source of the new/ugly sounds you are hearing. And it's an inexpensive tool that any shop/mechanic will have.

mike c.

 

[ethanthereal]

That didn't sound like rod knock. Rod knock is generally a dull thud sound.

What color was the smoke - white, gray, or black?
White smoke = coolant is getting into the engine via a bad head gasket, bad gaskets around the intake manifold, cracks in a cylinder head or in the block, etc.
Gray smoke = oil burning. Aged piston rings, busted piston rings, scored cylinder walls, etc. Valve seals leaking badly (normally this slowly builds up, you'll get a puff of smoke on startup and then later when idling or decelerating, and eventually it smokes all the time), turbos leaking oil (on turbo equipped engines obviously, not found on Gen 1 or Gen 2 Hyundai Genesis sedans), head gaskets leaking.
Black smoke = running really rich. Fuel injector stuck wide-open, ignition not working on a cylinder, fuel pressure way too high, PCM/ECU gone stupid commanding excessive injector ON time (too much gas again), etc.

Step one: check the oil level on the dipstick. If it's suddenly really low, find out where the oil went. You may have already burned a lot of oil from an internal mechanical issue. Running an engine very low on oil is a sure way to hasten its death. The noise I heard in the video sounds more like a squeak sound... possibly from no oil or too little oil pressure from a failed oil pump or failed pump drive chain inside the engine.

Then check the radiator coolant level. If it is low, where did the coolant go? An overheating engine makes the coolant boil/expand into the expansion/overflow tank initially; after a bit the tank is over-filled and coolant then gets dumped onto the street. An engine with failed gaskets (head gaskets, intake manifold gaskets primarily) or with cracks in the engine block or cylinder heads will let coolant into the combustion chambers and it ends up going out the exhaust pipe as sweet smelling gray smoke. Bad radiator electric fans, bad temp sensors that tell the ECU/PCM to run the fans, etc. can lead to overheating. On older cars (with mechanical fans) a busted fan belt leads to overheating.

Besides checking the oil and coolant levels, tests I'd recommend are:
1: basic compression test. If one or more cylinders are really low (and different from others) then the engine has internal issues. It might be as simple as a sticking valve, or a camshaft out of time with the rest of the engine (on many Hyundai 2.0 liter engines a pin that ties the camshaft to the drive sprocket/VVT mechanism works loose, letting the two parts slip out of alignment. The bolt holding the sprocket and variable-valve-timing mechanism to the camshaft keeps the parts tied together but can't prevent them from slipping out of time), or it could be signs of a far more expensive issue.

2: A "cooling system pressure test" will see if the system has any leaks. Leaks inside the engine itself (gaskets, cracks) generally require a lot of labor hours (=$$) to fix.

Any half-way decent repair shop can do those tests. I wouldn't drive the car to a shop though while it's making such noises. The tools to do those tests are small - many home mechanics have them - so the tests could be done in your garage/driveway. If both were okay, then time to locate the source of the noise. A "mechanic's stethoscope" (it looks like a doctor's stethoscope but it has a long metal rod rather than an audio pickup on the end) touched to various engine parts (engine block, cylinder heads, the body of the water pump, body of the alternator, body of the power steering pump, etc. - things that have moving stuff inside them - but don't touch the actual moving bits!) will pick up all sorts of sounds. It's amazing (and sometimes horrifying!) the sounds a healthy engine makes internally. Anyway, a mechanic's stethoscope will help identify the source of the new/ugly sounds you are hearing. And it's an inexpensive tool that any shop/mechanic will have.

mike c.

so update on this after a few more minutes of it running it did make the sound ill post a vid ina sec that i got during its run time had it towed home and dropped the oil pan metal shavings everywhereill send theses ina sec

edit smoke was a blueish grey

 

[ethanthereal]

https://imgur.com/a/4E5OiLv

 

[ethanthereal]

https://imgur.com/a/4E5OiLv

Another update I missed this in the oil pan

 

[jep604]

Another update I missed this in the oil pan

That's not good. Video sounded like a rod knock.

 

[ethanthereal]

That's not good. Video sounded like a rod knock.

yea my wallets crying on this one

 

[jep604]

yea my wallets crying on this one

Might be cheaper to go IAA and buy a wrecked, swap the engine and ECM so they communicate. I'm at almost 240K miles so I've been checking out medium mileage wrecked ones just in case.

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[ethanthereal]

Might be cheaper to go IAA and buy a wrecked, swap the engine and ECM so they communicate. I'm at almost 240K miles so I've been checking out medium mileage wrecked ones just in case.

Landlord won't let me do that bc he's an odd one but I found a shop that will fix it and im getting some forged rods from a guy at Mt motorsports