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Engine Specific Info and Questions => Non VW Group Diesel => Topic started by: shwak23 on May 04, 2012, 12:04:42 pm
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A friend of mine told me recently that his "repair guy" told him that in order to "clean" his 7.3 he should drain the oil and replace it with diesel and run the motor for 1 minute. Then drain and refill with diesel. Run... Drain... Real oilz.... Drive away.
I said... Don't ever do that. My friend has a 2005 6.0 Ford.
This is lol right?
Sent from my DROID X2
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Ive heard of filling with ATF before in a similar situation, but its at least got some lubricant in it.
I personally have considered filling my crankcase from top to bottom with diesel and maybe spinning it over SLOWLY by hand. but not flushing the oil galleys of all oil.
then just filter that fuel and run it as normal. but I had so much blow by that it wouldn't have mattered if I cleaned it out one week.
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I would have thought that maybe running 20% diesel, at most, would be about right, and just for a minute. Kerosene would be preferable but diesel is close.
The "motor flush" products at the auto parts store are mostly kerosene anyway, and they work pretty well for real gunked up engines.
I have a friend who bought a used 4.3 V6 GM engine. I told him to pull the rocker covers and oil pan at they yard and inspect. He didn't. They were packed with what looked like asphalt. I have bought engines at the junkyard that were only recently professionally rebuilt. It pays to look really carefully at what you're buying and look for the telltale signs but the stuff does work.
Honestly though, why does he think he needs to do this to his engine? If he's been changing the oil regularly and using the right kind of oil it's probably fine. Did these motors have a known sludge problem? Diesel engine oil has a lot of detergent additives to keep all the soot from clogging up the engine. It tends to keep any engine really clean inside.
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7.3 IDI will probably run the same no matter what you do to it.
7.3 PSD uses high pressure oil to run the injectors, and degraded oil will cause it to run like crap long before sludging is significant.
Of course an idiot could continue to sputter along another 10000 miles before changing the oil I suppose.
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7.3 IDI will probably run the same no matter what you do to it.
7.3 PSD uses high pressure oil to run the injectors, and degraded oil will cause it to run like crap long before sludging is significant.
Of course an idiot could continue to sputter along another 10000 miles before changing the oil I suppose.
thats kinda what i was thinking..
the 7.3 powersmoke, and 6.0 powersmoke use HEUI injectors, and they rely on high pressure oil to operate correctly..
i dont think the diesel would build enough pressure to operate the injectors.. i would think you would need 15w40 thickness oil to operate the injectors..
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6.9 and 7.3 IH are probably the toughest engine known to man... LOL.
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The 6.0 is running fine. He has had some weird turbo problems. That threw codes but solved themselves. He also has a weird internal high pressure oil pump leak or something that causes the oil pressure gauge to drop to 0 at idle... Yet obviously it still has oil pressure since it continues to run.
They are terrible trucks. It seems the cummins or maybe the duramax is the only way to go these days.
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Yeah the 6.0 powerjokes are notoriously problematic. They actually forgot to properly torque the torque-to-yield head bolts for some of the early motors at the factory, causing head lifting and cracking concerns followed by engine hydrolock! Couple that with an EGR (that, SURPRISE, fills the intake with crap) and half-spotty turbos like schwak found out. Over/underboost faults? Probably the turbine VNT vanes, or EGR valve sticking.
The Six-Liter Salute: Hood up w/ a green coolant puddle. :P
Now the International-sourced 6.9's and 7.3's?
They. Do. Not. Die. 8)
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What kind of reputation does the "new" engine have, the one that replaced the 6.0 after only a few years?
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What kind of reputation does the "new" engine have, the one that replaced the 6.0 after only a few years?
the 6.4 was also junk, AFAIK..
i know the compound turbo setup was junk.. they would make ~100psi drive pressure, while only producing 50-60psi boost..
the NEW 6.7 powersmoke is basically just a copy of the isuzu d-max, with a CP4 injection system, instead of the good ol CP3, and a whopping 80 cc's more displacement..
its still a ford tho..
had they went to isuzu, like GM did, and develop an engine for their trucks, then they might have something when they were done with it.
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Or just dump Navistar and go back to International engines like they used to in the 80's. Millions of truckers can't be wrong. ;)
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Or just dump Navistar and go back to International engines like they used to in the 80's. Millions of truckers can't be wrong. ;)
Was that supposed to be a joke?
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Or just dump Navistar and go back to International engines like they used to in the 80's. Millions of truckers can't be wrong. ;)
Was that supposed to be a joke?
arent Navistar/International sleeping in the same bed tho?
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Isn't it kind of a myth that you need to clean out an old engine that is in service? I had an 85 6.9 until a few months ago. I junked it because my brother ran it low on oil and I think a valve was going to drop or something. 230,000 miles on it, compression was within spec, non turbo and it did everything we needed. It pulled loads slowly, but once up to speed with 3.55 gears still got 15+ mpg.
I talked with a local who had his lift pump go out on the freeway and it didn't take long for a knock to develop and he pulled over. Didn't go away after a drain. His oil level was high on the side of the road and he got it towed home. I actually had an electrical carrier pump on my truck just because of the potential of such a thing with my bad luck :)
I have heard of people doing the seafoam and marvel mystery oil thing to.
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how would a bad lift pump let it run long enough to damage anything? when my lift pump quits, my car DIES in short order!
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how would a bad lift pump let it run long enough to damage anything? when my lift pump quits, my car DIES in short order!
It's mounted on the block and when it fails it typically leaks diesel into the crankcase. The IP does have an internal lift pump so it can pull it's own fuel, it just isn't good for the IP.
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. He also has a weird internal high pressure oil pump leak or something that causes the oil pressure gauge to drop to 0 at idle... Yet obviously it still has oil pressure since it continues to run.
Ahhh...... No. An engine will run a surprising long time with 0 oil pressure, A buddy of mine had a 3 year old Caddy with a motor that was going bad 500 miles before the warranty ran out. So we drained the oil and drove it until it lunched the bottom end. We then put the oil back in and headed for the dealer. Almost made it before we ventilated the block. It took 25 minute with no oil at highway speeds before it went.
I once rode back from the crusher in a big 6 car hulk transporter with no oil in it because of a filter leak. The owner would not pay fro the oil to limp it home. Almost made it. We got about 25 miles before it failed. Had to finish the 1/2 rack before we could hitch hike home.
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. He also has a weird internal high pressure oil pump leak or something that causes the oil pressure gauge to drop to 0 at idle... Yet obviously it still has oil pressure since it continues to run.
Ahhh...... No. An engine will run a surprising long time with 0 oil pressure,
Not one that runs its injectors by pressurizing oil.
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. He also has a weird internal high pressure oil pump leak or something that causes the oil pressure gauge to drop to 0 at idle... Yet obviously it still has oil pressure since it continues to run.
Ahhh...... No. An engine will run a surprising long time with 0 oil pressure,
Not one that runs its injectors by pressurizing oil.
its QUITE impossible to run a 6.0 or 7.3 powerchoke out of oil.. the oil is used to operate the injectors.. without oil for the HPOP to pump, it DOES NOT run..