Diagnosing Coolant in Oil on my 1999 7.3 PowerStroke
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- Опубліковано 21 вер 2021
- During my pre-trip inspection I noticed the engine sounded funny. I shut it down and started checking some things. I found the coolant bottle was empty and then the oil was way too full and obviously that's where the coolant went. I dug into the engine and decided to swap the engine so I could get back to work ASAP.
In this video I tear into the engine to try and figure out what went wrong and to repair it if possible. I still need to replace the leaky smoky 7.3 in my personal truck ASAP!
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My content is about my 1999 F350 with the legendary 7.3 Powerstroke, Hot Shot trucking and trucking tips in general.
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My Equipment for non-CDL Hot Shot Trucking:
1999 F350 4WD Dually with the 7.3 Powerstroke 11,200 GVWR
CM ALRD Flatbed body with added underbody Bauer tool boxes
2020 Big Tex Gooseneck Trailer 14GN25+5MR (30' with Mega Ramps) Derated to 14,799 GVWR
GoPro Hero 7 Black
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Just picked up a truck that has gray black oil was told its coolent in the oil engine runs perfectly other then the oil and small fuel leak
At least you had a spare when this one went down. Great video. Looks like your on the right track for having another good spare. Keep the videos coming
Been super busy with my latest project and a litter of boxer puppies. Need to edit videos of the project but I'm spending as much time on it as possible. Thinking of making it 2 or 3 parts. And I'm going to bid on another wrecked truck next week. One I was watching for today is up to $6300...128K miles on it. Sounds like the owner wants his truck back! After fees that will be around 8K!
@@2020HotShotTruckingLLC crazy money
Oil cooler it's on the outside of the drivers side of the block.I dealt with this issue on a brand new engine after 500 miles It's the Orings I had to fix mine on the side of the road in rural Kentucky the pouring rain. it took me 5hrs a job I don't want to ever do again in that situation.
The low pressure oil is till far higher pressure than the coolant and therefore when the oil cooler leaks you will wind up with oil in the coolant, not the other way around if the engine is running. My coolant was very low but what was left had no oil or diesel in it. This was caused by a crack between cylinder #1 and #3 which I showed at the end of the video.
You found cracks in the #1 and #3 cylinders which explains the coolant in the oil. But did you ever figure out how your #7 cylinder got filled with coolant?
No, I'm thinking that may have happened when I broke the head loose. Once I found the crack in the block the engine was toast. I stripped the block of usable parts and it went to the scrap yard this past Thursday. I apologize that I have fallen behind in my videos. The engine I swapped in place of this one cracked a piston. I bought another wreck for it's motor and installed it. I am in the process of rebuilding another one so for once, I will be starting with a fresh 7.3.
I learned that a radiator pressure tester is a great tool to diagnose leaking injector sleeves, cups, whatever you want to call them. If the system can hold 16lbs for an hour, you're probably good to go. Other wise check cylinders with a vacuum pump for coolant, or coolant coming out the top ring of the injector cups to head seal.
With cracked cups you would have fuel in the coolant as the fuel pressure is much higher than the coolant pressure. A small leak leaves tiny drops of fuel floating on the water. A larger leak overflows the degas bottle and pushes it out past the cap due to the pressure. On this engine I pressurized the coolant system and could hear it leaking into the engine. Found a crack between cyl 1 and 3.
@@2020HotShotTruckingLLC it's uncommon, but sometimes still happens. There are 3 possible leakage points on the cups. 1 at the top of cup to head seal point. This can allow fuel entering coolant. 2 a crack in the cup. This can allow fuel entering the coolant. 3 the bottom of the cup to top of cylinder seal. This leak can allow coolant to enter the cylinder. You usually notice the scent of evaporating coolant at the tailpipe. Unexplained loss of coolant is another big clue. The copper injector washer rarely allows fuel to enter the coolant.
@@Steakholder01 I've had 2 of the three: Cracked cups that allowed fuel into the coolant. I replaced the cups and after following the directions which unfortunately did not detail the injector hold down bolt torque procedure I had one or more injectors come loose and the cups raised up due to compression pressure. This pressurized the coolant system with combustion gasses. You will find the radiator return hose hard with pressure, but not hot and no heat from the defrosters. Also the cap will be venting coolant. So I got to replace the cups a second time and it was a lesson learned. My pre-trip inspections now include verifying heat out the defrosters so I know the coolant is throughout the system.
@@2020HotShotTruckingLLC that makes sense. Sorry to hear it. Riffraff diesel has stainless steel cups for sale now. Cleaning the bores is key. Got to be spotless. Putting the loctite 602 on the contact surfaces within the bore is another safeguard to having it seal the first time. Pressure testing with the radiator test kit after a warm 36 hour cure period is very important. The system should be capable of maintaining 16 psi for one hour. Just my 2 cents after doing it several times. It's the most pain in the backside things on this motor IMO. Good luck & God bless Hot Shot!
Are using dca in your coolant? Those engines are known for cavitation of the cylinder walls and you have to add dca to the green coolant. I installed a coolant filter on my truck and I buy the filters with the additive from a peterbuilt dealership
I was worried that was the cause of the coolant in the oil, but the timing cover looked fine. I had just bought the truck in December and hadn't used it much till early summer so it was still on whatever the previous owner had run. The engine I swapped into my truck I already had replaced the injector cups and I just bought ELC coolant for it. When I get done with my current project I will flush and fill with ELC. The injector cup sealant used on the early 99's and before was not compatible with the ELC.
It's SCA, supplemental coolant additives. Take a look at powerstroke help in depth dive into coolant technology. 99's are sketchy cause depending on the built date the "early" 99 cannot run ELC coolants. Fleet guard is one to look into. The chemicals in ELC eat the sealant around the injector cups, among other things, in early 99 models.
I got a 01 6.4 and oil won’t go down the filler neck. Any ideas ?
Well, for one the only 01 powerstrokes were 7.3's. If it's a 7.3, the filler neck is on top of the valve cover and there's nothing to stop the oil from going in unless the block is full. As for a 6.4, I have no experience with them at all. I would assume the oil fill would be similar to a 7.3. About the only thing that would cause that would be excessive sludge build up. I would pull the filler tube and look inside. Maybe remove the valve cover... doesn't sound good at all!
What would have caused this ?? How many miles do these engines have ??
Both engines are around 350K. This one wound up with a crack between cylinders 1 and 3. This past Monday the one I installed developed a bad miss and smoke right after picking up a load. I did a short video showing when it happened with video from the rear camera and audio inside the cab. The truck is at a mechanic waiting for him to diagnose it. Meanwhile, I tore down my other spare and found it had broken rings on one cylinder. Will take that engine to a machine shop to start the building process. It only had about 260K but the issue was there when I bought it a few years ago. Once I have a new or rebuilt engine, I should have no major issues for a long time. When you buy a used 20+ year old truck, you never really know the history of how it was abused or maintained.
Was you getting bubbles in the coolant tank ?
No, bubbles in the coolant are caused by combustion gasses. Most common cause for that in these 7.3's are loose injector hold down bolts that allow the injector cup to lift and this allows combustion gasses to enter the coolant from the cylinder(s) where the cups came loose. My block cracked and coolant entered the oil.
Why isnt the milage placed in the description
Didn't think it was necessary on a 20+ year old truck. Was around 360K.
@@2020HotShotTruckingLLC just curious thanks man for the fast reply
was your truck.turned up with tuner or.chip?
I used a 25 HP towing tune with a Hydra. When I bought the truck, I found a gold superchip in the glovebox so it may have been abused before I bought it with 333K miles on it.