Cummins losing coolant no leaks

So I have a Dodge Ram and it has a little less thanmiles on it. I love this truck.

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Lately though I've been losing coolant for some unknown reason. It goes from full to empty between checks! I had not driven during the nighttime. So what's the deal? I didn't see any leaks under the truck today.

Any answers are greatly appreciated. You should check the freeze plugs. It's quite possible. They do go bad.

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Good luck. Are u smelling coolant? I had this mercury sable that that did the same as yours ever three to four days had to add anti freeze and had no visible leaks or no smoking out of tail pipe so what I did added some alumi seal stop leak.

My vehicle did not have a radiator cap just over flow tank with cap. If your vehicle does not have a radiator cap like mine you could add the stop leak to the over flow tank but that would take a couple of days for it to sucked back into the radiator to start working so I removed the top radiator hose when the engine was cold and poured the stop leak directly into the hose and reinstalled had no more problems since then and that was a year before selling vehicle and it was still holding then.

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Please do not hold me to it that it is going to work for you but it is worth a try. Kelly answered 4 years ago. Just because you have never run into that problem before does not mean it has not happened or why would we say that think about Kelly have nothing to prove by lying about something like that.

I go with my answer. Well thats me. I like Kelly. He's probably right. I don't care either way pal. Is your name Kelly? Bang on means that he's right.Dan Ferrell writes about do-it-yourself car maintenance and repair. He has certifications in automation and control technology.

Coolant loss may indicate a poorly maintained cooling system, a system fault, or even a change in driving patterns. For example, a coolant leak could have any of these causes:. Whatever the cause, you need to address the problem before it turns into a more serious and expensive repair.

Coolant loss can destroy your engine if a small leak suddenly turns into a larger one and the engine overheats without enough chance to cool. Within the next sections, you'll find the most common sources of coolant loss and some tests you can do in your own garage. Before going into full troubleshooting mode, the first few sections start you out with some simple diagnostic tests, things to check depending on your particular problem.

Later come some more involved troubleshooting tests. Overall, the tests are not difficult although some may require special tools.

Just keep in mind that one or more auto parts outlets in your area may lend you these and other tools. Take advantage of this service that can help you save hundreds of dollars in diagnostics and repairs. If you recently topped up the overflow tank, check that you are adding only the required amount for your system.

Consult your car owner's manual or vehicle repair manual. The radiator should have the coolant reaching just below the filler neck. If you just replaced the fluid, double-check that you properly closed the radiator petcock, reinstalled the radiator hoses, and used the right sealer for the thermostat gasket if you installed a new one.

Just like a combustion leak into the cooling system, a blown head gasket, cracked head or block, or faulty oil cooler lines can cause coolant to leak into the engine oil. Often, you can tell coolant has leaked into the lubricating system by the appearance of a milky white substance on the dipstick or under the valve covers. To check for this substance:. A blown head gasket, bad intake manifold gasket V8 enginesa cracked block, or a cracked cylinder head may cause coolant to mix with engine oil.

If you suspect coolant has mixed with the engine oil, repair the problem as soon as possible. Antifreeze in the oil can damage the cylinders and pistons. Coolant loss can cause overheating, but overheating can also cause coolant loss. To check this, you may need to top up the system and then see if the engine overheats and leads to coolant loss again. The temperature gauge may be indicating a higher than normal temperature or an overheating condition.

Check for the potential causes of overheating: 1. Make sure there's enough coolant in the system. Check for retarded ignition timing. Retarded timing can allow heat from the combustion to leak out through an open exhaust valve, raising heat in the exhaust valves and manifold. Coolant loss may also come from specific driving patterns and engine operating conditions.

If your driving pattern or traffic conditions have changed recently, this might be the reason for the drop in coolant in the system.Hey Guys, its been a long time. I am currently driving a 98 Buick with the 3. My problem is I seem to be losing coolant, at the rate of about the entire overflow in 2 weeks I only drive on avg miles a day. The problem is I have no leaks. The intake gaskets have already been done on this car, and I triple checked around it with the die.

I know I can keep adding coolant, but I like my cars as leak free as possible and if it is something bad, I want to know about it now not later. The first thought that comes to mind is that the coolant is getting pushed out the reservoir overflow tube when the engine warms up because of a bad radiator cap. You can test a radiattor cap with a thermometer, a hotplate, and a Pyrex vessel. Simply hang the cap into the water, turn the hotplate on, and see what temperature the T-stat opens at.

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Hey Mountain good to see you are still around. I forgot to mention the pressure test, when pumped up to 15 PSI it feel to around 10 or 11 PSI after about 10 or 15 min. I was told it is possible I did not have a good seal at the radiator. The overflow line from the rad to the overflow container was pinched off at the time of the test. Still though if I am losing coolant with die in it would I not see it somewhere around the over flow if this was happening??

There are other possibilities. Also, have you been smelling any sweet smell when the heater is on? You could have a miniscule leak in the heater core. You could if you desire pressure test this loop seperately from the rest of teh cooling system. Yes UV sensitive dye I work at a Honda dealership and they have all of the UV lights and eqipment … I did check the oil and trans fluid for signs of the dye and came up empty on both counts.

No smell of antifreeze, no white smoke while running, dry floors, no dye under the car at all looked all around the pass compartment as well ….By Steve MutterMarch 27, I got a f 6. Customer has come by 3 times to have coolant top up about 6 litres each time, good customer who takes care of his trucks. I have checked for external leaks and found none, oil level is not over full, trans oil looks red and is not over full, have pressure test with it running and found the cooling system holds a vacuum.

Anyone out there run into anything like this? Last thing I am going to do befor taking the heads off is pressure test it over night and check the glow plug holes for coolant, any input is appreciated.

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I have no answer or advice for you other than what has been done and discussed. We had three of these in the shop in the last few months with no diagnosis. We pretty much made the same inspections and tests that you did but I don't think either of us noted any pressure spikes.

I power braked it f with a ultility box and the pressure gauge would climb like a boost gauge.

cummins losing coolant no leaks

Damaged the head surface so its getting one head for sure, I have a video but its on my phone. If I can find the time I will try and upload it.

You can post now and register later. If you have an account, sign in now to post with your account. Paste as plain text instead. Only 75 emoji are allowed. Display as a link instead. Clear editor. Upload or insert images from URL. There are no registered users currently online.

All Activity Forums Engines and Drivetrain 6. Rate this topic 1 2 3 4 5. Posted March 27, Share this post Link to post Share on other sites. Posted March 28, Hi Steve! Look for discoloration in the ports of the exhaust manifolds as you tear down.

Probably nothing you didn't already think of Good Luck! Posted March 31, Thanks for the reply's, will be tearing down the engine this week and will post what I find. Posted April 2, Posted April 14, Log in or Sign up. Find Trucking Jobs. Sep 17, 1. Ok guys, first post and it's a challenge- I've gotten some pretty good info off this site before but this one is a bit odd.

In the fleet here, there is a Peterbilt with a Cummins ISX that is losing coolant at about a gallon a day around miles. There is not an external leak anymore, it previously had a leak at the coolant filter, filter valve o-rings, and then the fill cap on the surge tank. Now it's losing more coolant. There isn't any white smoke. The EGR cooler is not original, but I don't have any info on when that was changed. So far I have: Changed coolant filter, changed surge tank old one was cracked, replaced with Dormancoolant filter valve o-rings, new surge tank fill cap genuine Paccarput a hose from the pressure cap nipple to the frame so i can see any evidence of water loss- None so far.

Today I added a catch bottle so if there is stuff coming out and drying up maybe I'll see it now. There is more coolant on the secondary side of the surge tank than on the other trucks, I don't know if that indicates a defect or is just a design thing. I did pull the EGR venturi tube off the intake tube, and found liquid in it. The tubes were all fairly clean, just a light coat of soot, but the liquid was odd.

I dumped it and then rinsed the venturi tube out with water into a bowl. There was no sheen on the water in the bowl, just the soot swirling around in it, so it may be possible that this is my missing coolant, but is it possible to ingest that much coolant and not have any smoke?

This truck has been an ongoing headache for me, I only started here three months ago but this truck has spent more time in the shop than the others by far. It is fittingly numbered 13, I just refer to it as my unlucky 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. Sep 17, 2.

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EGR cooler is your problem. Venturi pipe would be bone dry if the cooler is ok. Yes, your engine will burn coolant and not produce any smoke as the DPF will actually collect the vaporized coolant. HeavydSep 17, Sep 17, 3. Thanks, the A team van of knowledge strikes again- I was figuring that might be the issue, and what I have read about these blocks "settling" makes sense as far as the timing of this failure.

The guy who was driving this truck for a short time was extremely abusive to the trucks, he blew multiple sets of motor mounts bolts out of another Kenworth here, and I guess when you run a truck harder it can cause the block to move around and break the cooler internally. It does make me wonder if the external leaks were a symptom of the issue all along, if the higher pressure of the exhaust gasses was pushing beyond what the pressure cap could vent and was just finding all the weak points.

These emissions systems have a pretty steep learning curve to them, I finished school when the E was the latest and greatest and EGR on big engines was just a campfire story to scare the young mechanics. Heavyd Thanks this. Sep 20, 4. X-CountrySep 20, Sep 24, 5.

Do you see any steam coming out of the oil breather? Have the EGR cooler pressure tested for leaks, that may be the problem. Good luck. MazelTruckSep 24, So I have a Dodge Ram and it has a little less thanmiles on it. I love this truck.

Coolant Keeps Disappearing?

Lately though I've been losing coolant for some unknown reason. It goes from full to empty between checks! I had not driven during the nighttime. So what's the deal? I didn't see any leaks under the truck today.

Any answers are greatly appreciated. You should check the freeze plugs. It's quite possible. They do go bad. Good luck. Are u smelling coolant? I had this mercury sable that that did the same as yours ever three to four days had to add anti freeze and had no visible leaks or no smoking out of tail pipe so what I did added some alumi seal stop leak.

My vehicle did not have a radiator cap just over flow tank with cap. If your vehicle does not have a radiator cap like mine you could add the stop leak to the over flow tank but that would take a couple of days for it to sucked back into the radiator to start working so I removed the top radiator hose when the engine was cold and poured the stop leak directly into the hose and reinstalled had no more problems since then and that was a year before selling vehicle and it was still holding then.

Please do not hold me to it that it is going to work for you but it is worth a try.

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Kelly answered 4 years ago. Just because you have never run into that problem before does not mean it has not happened or why would we say that think about Kelly have nothing to prove by lying about something like that. I go with my answer. Well thats me.Coolant, also known as radiator fluid and antifreeze, is vital for the hydration of the cooling system and the vehicle. Mechanical failures in the cooling system are one of the main reasons cars break down on the highways.

Monitoring its level and condition is a part of the regular maintenance of the vehicle.

Losing Antifreeze With No Apparent Leak

Generally, there should be a leak somewhat if the vehicle is losing a high amount of antifreeze. However, a car could be losing coolant but no leak. It may sound ghostly if you think of coolant loss, no visible leak. But, things are not as complicated as they appear to be.

Coolant Keeps Disappearing?

A poorly maintained antifreeze system, defective components, or a rapid change is the driving style may contribute to this coolant disappearing. These parts could be the culprit when the antifreeze level is sinking down without any visible leak:.

Overfilling the system can be the reason for the mysterious disappearance. You have to keep the liquid at the required level. The coolant in the radiator should be just below the filler neck.

cummins losing coolant no leaks

It could be a blown head gasket, a fractured cylinder head, damaged cylinder bores, or a manifold leak. It could also be a hydraulic lock. If the antifreeze vanishes without any apparent reason, check these components for cracks, damage, or defects. Any of these issues can destroy the engine if it is going for too long.

However, you may breathe easy if the mechanic does not find any trace of exhaust gases in the coolant.

cummins losing coolant no leaks

It means that the liquid has not reached the engine yet. The radiator cap can deteriorate over time, letting antifreeze slip through when you are driving.

A clogged radiator system could be a problem too as it blocks the flow of the liquid. Check the radiator when the coolant disappears without any trace. Engine overheating and coolant are closely related to each other. Loss of the liquid can lead to the overheated condition but overheating can also contribute to the coolant loss.

Just fill up the tank to the maximum limit and keep an eye on the engine condition and the rate of coolant usage. Using a temperature gauge will tell you whether the engine is running hotter than usual or not. If this is the case, take the car to a mechanic to find out the causes of overheating. Solving the issue will bring back the normal cycle of coolant consumption. Tsukasa Azuma is an awesome car blogger of Car From Japan.

He owns a car repair shop at downtown Osaka, and he put all that experience to good use in his sharing posts.


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