Engine coolant mixing with engine oil is a sign of an internal gasket or engine failure. When the coolant mixes with the oil, it robs the oil of its lubricating properties and can destroy an engine rather quickly. In the event coolant is suspected of mixing with the engine oil, the engine should be shut off and not started again until the failure has been corrected.
If the coolant level continues to drop, but there are no signs of coolant leaks on the ground or from the exhaust pipe, there is a good chance the coolant is leaking into the crankcase and mixing with the engine oil. A cooling system should not need to be topped off frequently. In fact, adding more than a pint or so at each oil change interval may be indicative of a loss of cooling system integrity. While oil has an earthy, musky smell, coolant smells almost sickeningly sweet.
In the event coolant loss is evident, but no leaks are seen, pull the engine oil dipstick and take a whiff. If even the faintest hint of sugar hits the olfactory sense, odds are the cooling system is swapping fluid with the engine oil. When coolant first invades the crankcase and mixes with the oil, it can leave an odd river of green, red or orange in the brown of the oil, depending on the type of coolant the vehicle uses.
Down below the thinner portion of the mixture is a thick, gooey concoction that resembles a melted milk chocolate bar.
The latter mixture gums up engine passageways and is normally indicative of a ruined engine. Once the fluid has had time to mix to this visual consistency, the grit in the coolant has overcome the lubricity of the oil and scoured the bearing beyond repair. This article was written by the It Still Runs team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.
To submit your questions or ideas, or to simply learn more about It Still Runs, contact us. The Dreaded Milkshake When coolant first invades the crankcase and mixes with the oil, it can leave an odd river of green, red or orange in the brown of the oil, depending on the type of coolant the vehicle uses.
References Ford Parts. About the Author This article was written by the It Still Runs team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.Skip to content propecia buy now. Return to Engine.
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what would cause oil in coolant on cummins ISM?
Post a reply. Also, the truck does not smoke at all, whatsoever. By the way, your truck can't be stock. Not if it blows black smoke at least Take it out and do a pressure test under water and that will tell you. I have heard of people finding a bad cooler and then find out the gasket is bad also. I have a question that goes along with this for somebody smarter then me.
If the cooler was bad it would leak oil into the coolant while the engine was running due to the oil pressure being more then the coolant pressure.
Wouldn't the coolant then get into the oil after you shut the truck off? The cooling system has 10 to 15 psi for a while after you shut down. How much oil are you seeing in the coolant? The pepper becomes incredibly sticky in hot coolant and seals leaks permanently. This of course won't work in Calgary because it makes the horses sneeze.I have a cummins qsx15 in a farm tractor and I am getting oil in the water and excess coolant pressure in my radiator.
I have replaced the oil coolers coreswhich I have to do every hrs, and I still have the problem. I had the head off hrs ago and I don't think we used new head bolts when we put it back on. The elevated coolant pressure is suspect to me.
Just asking. Maybe pocketchange can tell us if there is water in the engine or hydraulic oil, I'm still curious. It is more common to get water in the oil rather than oil in the water. It's more a question of viscosity than pressure. The viscosity of the coolant could be as low as 0. This makes a big difference to the amount of pressure required to force the fluid through a small crack.
You could get oil into the water at start-up, when the oil is pressurized but the coolant is not. But then you would also get water into the oil at shutdown, when the coolant is still pressurized and very low viscosity but the oil is not.
If you are only getting oil in the water, and not vice-versa, then something unusual could be happening, and it might not be a blown gasket or cracked head. There are lots of ways to pin point the issue at hand. But, in reading your question I would 1st say, when ever you are working on engines of any make or style and have to remove a head, intake or other major component, new bolts are mandatory. You don't say why you had to removed the head 2. I assume it is correlates to the head removal.
If so I would cough up the money and have a Cummings repair person make the needed diagnose and repair. You will be money ahead. Well I went ahead and pulled the motor out of the tractor yesterday and took it over to Cummins Southern Plains in Houston, they should start on it today.
I'll keep ya'll posted on the damages. The mechanic told me yesterday that they have new updated liners they can use. He said this motor is bad about blowing head gaskets at the fireing ring and the new liners have a different head gasket.If there is an engine out there that old school guys always go to is the older mechanical 4BT Cummins.
The reason these engines are still used in industrial and jeep swap applications is due to their reliability. This engine is a pure mechanical engine with very few electronic components. However, no diesel engine is perfect which includes the 4BT and 6BT.
This short article will explain the few issues with these engines and how to diagnose them. The first generation 6BT 5. Overtime these 53 Blocks are susceptible to cracking causing coolant leaks. The cracks start out very small but these 53 Blocks will eventually have to be J-B welded, hot welded or cold stitched back together. These repairs can extend the life of the engine but overall the engine will need to be replaced when the block goes south for good.
There is some evidence to indicate the 53 style block was used in some 12v models but the cracking seems to be much smaller than the 24v engines. The Carbon content should be 1. In addition to the incorrect cast iron chemical composition, poor design led to thin walls in the water jacket that made the blocks prone to cracking. The cracks in the block are caused by overheating, towing heavy loads and over revving the engine.
The other big issue with the 4BT and 6BT 5. The dowel pins are known to either crack or become loose. The pins were made from steel and located on the front timing gearcase. The problem with the steel pins is that the constant heat cycles expand and contract the steel causing it to unhinge from the casing. Once the pin falls from the casing either one of three things will happen. The best case scenario is it will fall into the gearcase but miss everything and safely land in the oil pan causing no major damage.
There's Oil in my coolant, but no coolant in oil! 2007 VNL670 w ISX
If the dowel pin falls into the timing gearcase and hits one of the gears in mid rotation it can cause the pin to immediately bounce around and eject out the side of the crankcase. If this happens oil pressure will immediate drop and probably destroy the engine due to lack of lubrication.Log in or Sign up.
Find Trucking Jobs. There's Oil in my coolant, but no coolant in oil! Dec 30, Oil pressure in engine runs from 30 to 40 psi. Water pressure is much lower, so oil willl flow into water. Possibly oil cooler Had several Cummins do it. Cooler can be checked at radiator shop, and is the first thing to check. Could be pitted liners, or O-ring on liner. Good luck. Yes, let employers and TruckersReport text me with new opportunities, job alerts and other career information to the number I provided.
There is no charge for this service, but standard message and data rates may apply. One more thing I forgot to mention. When I put my finger into the bottom of the blow by tube there was a big gob of sludge at the end coolant and oil mixed.
Not sure if that makes a difference, but I figured it was worth mentioning. What part of the engine does the blow by tube lead into, and could a failed oil cooler have led to the sludge coming out of the tube? I know how to take things apart and put them back together, but that's about as far as my knowledge goes. I should have taken it to a radiator shop to have the system pressure tested before I started tearing it apart I reckon, but I've already started now haha.
I have the instructions on how to test the oil cooler once I get it off. I really hope thats what the problem is. I haul containers money is less than idealso I try to do as much myself as I can. I'd much rather spend time at home working on my truck than driving to make back what I spent at a shop, so yalls advice is a huge help!
The oil cooler did not cause the blow-by. The blow-by comes because something is worn in the engine, quite often the rings allowing compression gasses to get in the areas that lead to the area betwen the valve covers and the heads. That tube you speak of allows the gasses to escape and not build up in the block.We can see that your guest and been lurking about. When you register on the MoparMan.
Com site you'll be able to interact with all the other members. This is the most friendliest Cummins forum you'll ever join. Com this will open up many more options and functions on the website. Everyone is very friendly and helpful just ask questions and everyone will help you out the best they can. Usually I search the Forum before asking, usually find the answer.
Breaking protocol this time and asking first - small panic. On the way home from work last night, noted temp guage a little higher than typical, not high but not where it sits normally. This morning, found radiator cooland about " lower than filler neck, some oily-looking emulsion in it.
Immediately thought "head gasket! Ashamed here Unfortunately the only thing I can think of is a cylinder leakdown test and I 1 dont have the gauges and 2 don't know how to do it on a diesel.
Maybe I should leave the cap off, start the engine, and look for bubbles in the coolant as it flows by the neck? Yep look for bubbles in the coolant at idle but, don't drive it if there are, as you'll cause more damage to the engine.
I hope it is a simple head gasket. My 92 is approaching k miles. No problems yet.
Never knew - I've only had this truck for 20 years - that such a thing existed. On my way to read up on it. I don't know if it is alright to post links to other forums here.
If not, please excuse me and please delete this. And they told us at work we can't carry vacation days over to next year, use them or loose them All trucks have the oil cooler which is behind the oil filter mount.
These can leak and generally it pushes oil into the coolant since the oil pressure is higher than coolant pressure. I think I can attribute the coolant loss to the cap, that only holds about 7 psi - but the lost coolant should have gone into the overflow bottle I think. I did find the oil cooler, gunked it all down in preparation to take it apart. Book says test with 70 psi air, the psi I put on the radiator held but probably wasn't enough.Discussion in ' Trucks [ Eighteen Wheelers ] ' started by adistoe82Nov 12, Log in or Sign up.
Find Trucking Jobs.Engine oil in RADIATOR problem
Nov 12, 1. A few months ago I nottice that my coolant exapansion tank is turning a little black inside and I though it's just gunk from the engine running hot during summer with heavy load in California. A few days ago I pulled the coolant filter out and surprize, a few drops of oil inside. In the past few moths I did oil analisys and everything was great, no coolant in oil.
There are no air bubbles in the expansion tank. Does anybody know how this small amount of oil got into my coolant??? Thank you. Yes, let employers and TruckersReport text me with new opportunities, job alerts and other career information to the number I provided. There is no charge for this service, but standard message and data rates may apply.
Nov 13, 2.
Oil cooler housing to block gasket. They were bad for minor seepage. Where the oil leaves the filter head and goes to the block through about a 1" diameter hole the gasket seeps right there.
All around the pass through is the coolant jacket. When the engine cools down the metal contract and oil seeps through to the coolant. Once warm and the metal expands again it makes a good seal, that is why the leak into the coolant is so slow.
Not that bad of a job, turbo has to come off.
Turbo studs and nuts probably all rusted and seized, that would be worst part. Not sure how great the access would be on a volvo, but I would guess around 6 hours labor. HeavydNov 13, Nov 13, 3. Nov 14, 4. Dec 2, 5. I just got my truck out from the Volvo dealer and they found a bad oil cooler. The bill was almost but I had everything replaced, coolant, coolant filter, oil cooler, expansion tank and two flushes. Thank you all for your answers.
Jan 20, 7. ISX cummins We have had the same Issue. We also had a large amount of oil missing and low coolant level in the expansion tank. With no smoke in the exhaust Any trouble shooting ideas