2012 Ram 1500 Hemi Oil In Coolant I Am At A Loss.

jws123 · Jan 31, 2023

I am working on a 2012 ram 5.7 overheated had oil in coolant like ALOT tons of it was packed but no coolant In oil. So I tore it down sent heads off to get checked/re surfaced he said they where warped throw it all back together flush the living hell out of the system new hoses new rad ect. Let it run hits 210f It boils over still getting oil in coolant residual? I dont know I flushed it so many dam times just keeps boiling over and spewing coolant/oil all over at operating temp. What I dont get is where could it be mixing oil with coolant but not coolant with oil... And overheating I am open to all suggestions at a loss here hate to condem the motor since it runs so good.

What has been done
-----------------------------------
Heads re surfaced
New gaskes
New tstat Twice! its for sure good.
Flushed it 10 times burped system.
Compression is great runs good dont smell any coolant out tailpipe.

EdGs · Jan 31, 2023

Could've sworn I read somewhere that there was a problem with water pumps where the impellers were not spinning as they should???

Plastic vs. metal impellers???

Is it using oil? Leftover residue maybe?

I would let it sit for a day, then crack the oil drain plug loose so that it drips and see if coolant comes out. If there's coolant in the crankcase, it should make itself known very quick.

Possible crack in the head? Or block?

Or if theres oil coòler in the radiator, mixing there?

Wild one · Jan 31, 2023

Cracked block/cylinder wall

Lee Peterson · Jan 31, 2023

Could it be the timing cover gasket?

Dodge 1500 4X4 · Jan 31, 2023

X2 on cracked block cylinder wall.

jws123 · Jan 31, 2023

Dodge 1500 4X4 said:
X2 on cracked block cylinder wall.

Wouldnt i show a compression loss? i dont remember seeing any when cleaning up cylinders anything is possible tho i will pressurize all cylinders see if any leak into coolant system

jws123 · Jan 31, 2023

EdGs said:
Could've sworn I read somewhere that there was a problem with water pumps where the impellers were not spinning as they should???

Plastic vs. metal impellers???

Is it using oil? Leftover residue maybe?

I would let it sit for a day, then crack the oil drain plug loose so that it drips and see if coolant comes out. If there's coolant in the crankcase, it should make itself known very quick.

Possible crack in the head? Or block?

Or if theres oil coòler in the radiator, mixing there?

Nothing in the oil pan no coolant.
To early to tell if using oil so far I dont think so not drivable since it overheats.
No cooler on this year truck.
Water pump looked good but going to remove it again make sure nothings slipping.

Dodge 1500 4X4 · Jan 31, 2023

jws123 said:
Wouldnt i show a compression loss? i dont remember seeing any when cleaning up cylinders anything is possible tho i will pressurize all cylinders see if any leak into coolant system if oil is getting into the cooling system.

Do a leak down test it will test the cylinders and it may pressurize the cooling system if there is a crack in one of the cylinders.

Wild one · Jan 31, 2023

jws123 said:
Wouldnt i show a compression loss? i dont remember seeing any when cleaning up cylinders anything is possible tho i will pressurize all cylinders see if any leak into coolant system

Cracked cylinder could be hard to see,especially if you're not looking for it,and probably won't show up on a compression test if the rings are still sealing.It's only a guess on my part though.

doc 11 ACR · Jan 31, 2023

X3 on the cracked block. Your problem only happens when the thermostat opens at op temp.

MRFREEZE57 · Jan 31, 2023

Years ago my brother had a 62 Chevy Nova that found oil in radiator, the block had a hairline crack in an oil pressure gallery and was forcing oil into the coolant. Dad found it by stripping the block, blocking the water passages and filling the block with gasoline and found the spot where was seeping into a lifter gallery.

pacofortacos · Feb 1, 2023

Oil pressure is generally significantly higher than coolant pressure, so if you have a small crack it is possible to get oil in the coolant but not coolant in the oil - at least not a bunch of coolant.

They do have ways to test for combustion gases in the coolant - this will tell you if you have a crack/leak in any of the combustion areas (head gasket, cylinder wall, etc). If there isn't any combustion gases then the leak is most likely in an area that the oil and coolant are close to each other (oil galley/block area, maybe some gasket area) ( I haven't been through a hemi block to know all of the passages.

Read this - the combustion gases part is at the end.

How to Test for Head Gasket Failure

Learn how to test for, identify, and diagnose a head gasket failure in your vehicle.

repairpal.com

or try what scotty shows

How to Test a Blown Head Gasket in Your Car

Blown head gasket. How to Test a Blown Head Gasket in Your Car, DIY with Scotty Kilmer. How to check head gasket. Head gasket leak. How to test for blown hea...

www.youtube.com

jws123 · Feb 1, 2023

Cracked cylinder is starting to sound likely I guess tomorrow I will do some more testing check water pump pressurize a few things if all fails guess I am tearing engine out I have a spare block but didnt really feel like building a motor right now lol..

jws123 · Feb 1, 2023

Well after hours of screwing with it confirming everything is 100% right still boils at 215f fine up until then Sooo guess motors shot.

jws123 · Feb 3, 2023

Found a motor its a 2019 Just want to double check besides sensors ect any reason why this wouldnt fit? did anything change on the hemi on newer ones? it looks the same to me.

jws123 · Feb 6, 2023

Old motor is out Il tear it down eventually looking for a crack it dove me crazy so I wanna know haha. The one I picked up looks spotless cant have many miles on it at all the only thing wrong with it was a broken valve spring... paid $200 for it was a 'core' to them. Blows my mind someone would change a $4000 motor just because of a spring lol motor has no other damage.

CaptCurt · Feb 6, 2023

jws123 said:
I am working on a 2012 ram 5.7 overheated had oil in coolant like ALOT tons of it was packed but no coolant In oil. So I tore it down sent heads off to get checked/re surfaced he said they where warped throw it all back together flush the living hell out of the system new hoses new rad ect. Let it run hits 210f It boils over still getting oil in coolant residual? I dont know I flushed it so many dam times just keeps boiling over and spewing coolant/oil all over at operating temp. What I dont get is where could it be mixing oil with coolant but not coolant with oil... And overheating I am open to all suggestions at a loss here hate to condem the motor since it runs so good.

What has been done
-----------------------------------
Heads re surfaced
New gaskes
New tstat Twice! its for sure good.
Flushed it 10 times burped system.
Compression is great runs good dont smell any coolant out tailpipe.

The oil mixing w/the coolant, and not Visa-versa, could be that you have 35-60lbs psi of oil pressure vs 12-18lbs psi of coolant pressure. Just a thought.

Sur5er · Feb 6, 2023

Most shops have a CO (Carbon Monoxide) tester just for that purpose. OTOH, if your radiator pressurizes in just a minute or two, go with warped/cracked block/heads!

blackbetty14 · Feb 6, 2023

Now that you have it out... pull the spark plugs and pressurize the cooling system (air compressor to the pump and block off Tstat with coolant in the engine). Crank up the pressure 20lbs and then hand rotate the engine over a few cycles after giving it 30s after applying pressure. I wonder if you will get coolant pushed out of the spark plug hole on the offending cylinder. Then you can pull the head and inspect to help narrow it down. If you have those cheap 5mm snake cameras off amazon you can put that in and look in the cylinders with the heads on after pressurizing.

To hook up to the water pump get some rubber couplers/reducers from home depot and a steel or brass reducer to 1/4" NPT, then screw in a air compressor quick disconnect. Hook up a compressor and adjust the regulator to your comfortable pressure. You will need coolant in the motor (full) for this to work though. Might work :shrug:

Dave rittco · Feb 6, 2023

jws123 said:
Nothing in the oil pan no coolant.

To early to tell if using oil so far I dont think so not drivable since it overheats.

No cooler on this year truck.

Water pump looked good but going to remove it again make sure nothings slipping.

2012 Ram 1500 Hemi Oil In Coolant I Am At A Loss.

Senior Member

Senior Member

Senior Member

Senior Member

Senior Member

Senior Member

Senior Member

Senior Member

Senior Member

Junior Member

Senior Member

Senior Member

Senior Member

Senior Member

Senior Member

Senior Member

Junior Member

Member

Senior Member

Junior Member

Similar threads

Forum statistics

Share this page