Dirty Oil...again
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Junior User
Joined: Nov 2008
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From: Vancouver WA.
Dirty Oil...again
I've got a 67 f250 ranger with a 352/ COM combo.
I flushed the motor and changed the oil 2x in the last 600 miles due to the oil turning black so quickly.
I just looked at the oil this weekend and the oil is black again with only 250 miles on it.
I have been using the Castrol high mileage 10-40 in it.
What is causing the oil to turn so quickly?
I flushed the motor and changed the oil 2x in the last 600 miles due to the oil turning black so quickly.
I just looked at the oil this weekend and the oil is black again with only 250 miles on it.
I have been using the Castrol high mileage 10-40 in it.
What is causing the oil to turn so quickly?
Posting Guru
Joined: Dec 2010
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From: Chino Hills
I saw it one time with an old penzoil engine I got, but I after the first time in 250 miles. I flushed with diesel oil, and used a drill to prime. That pretty much disolved all the "sludge", and primed with cheap oil. Then ran that for 500 miles, but it seemed normal for the age of the engine.
I've also seen it with extreme blow-by when the engine was richer then needed.
I've also seen it with extreme blow-by when the engine was richer then needed.
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Joined: Jul 2002
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From: Long Island USA
Yep, if that's the original motor, any newer detergent oil is going to start melting away decades of paraffin buildup.
Just keep an eye on it. When it turns again, change it. And keep changing it.
Or pull it all apart and get rid of the sludge. But then you should just rebuild it, and so on and so on...
Pull the valve covers, I bet there's a bunch of it under there. Most of it, matter of fact. Be careful not to let anything get loose into the head drains. It might be the best way to get rid of most of the crud.
Just keep an eye on it. When it turns again, change it. And keep changing it.
Or pull it all apart and get rid of the sludge. But then you should just rebuild it, and so on and so on...
Pull the valve covers, I bet there's a bunch of it under there. Most of it, matter of fact. Be careful not to let anything get loose into the head drains. It might be the best way to get rid of most of the crud.
Posting Guru
Joined: Jan 2005
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From: Douglas, Georgia
gasket set $80
or if the sludge happens to go through the pump and past the filter you'll need a rebuild.
I don't know your situation, it might be your only driver, but I've pulled some motors apart that folks said "we run it everyday, it runs great"
after seeing the 5gallon bucket full of black crap when I'm done cleaning, I opt for the gasket set.
Under the valve covers and the tray above the lifters can hold ALOT of junk.
good luck,
Drew
or if the sludge happens to go through the pump and past the filter you'll need a rebuild.
I don't know your situation, it might be your only driver, but I've pulled some motors apart that folks said "we run it everyday, it runs great"
after seeing the 5gallon bucket full of black crap when I'm done cleaning, I opt for the gasket set.
Under the valve covers and the tray above the lifters can hold ALOT of junk.
good luck,
Drew
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Posting Guru
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From: Mississippi
Nothing unusual for high mileage engines, particularly older carberated ones, IME. If the oil is just black and not broken down, just change it every 3000 miles and dont worry about it. We used to have detroit diesels for irrigation units. The oil would be black as pitch, change it, crank it, check for leaks, shut it off and check oil level. The oil would be so black you would swear it hadnt been changed in years. Take it to the field and let it rip.
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Junior User
Joined: Nov 2008
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From: Vancouver WA.
Thanks for the advice all....I will pull the valve covers and check for "extra crud" and flush the motor again. I need to change the Valve cover gaskets anyway..
I do have a small exhaust leak on the passenger side...would that have anything to do with the oil color changing so quickly?
I do have a small exhaust leak on the passenger side...would that have anything to do with the oil color changing so quickly?
Hotshot
Joined: Jul 2005
Posts: 13,834
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From: Middle Tn.
Thanks for the advice all....I will pull the valve covers and check for "extra crud" and flush the motor again. I need to change the Valve cover gaskets anyway..
I do have a small exhaust leak on the passenger side...would that have anything to do with the oil color changing so quickly?
I do have a small exhaust leak on the passenger side...would that have anything to do with the oil color changing so quickly?
In a word, NO!
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