Cylinder Wash
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4wd Low
Joined: Mar 2016
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Cylinder Wash
In my 2003 F250, the fuel injector on #4 cylinder got stuck open and a local mechanic says the excess fuel "washed" the cylinder and compression is <100psi. Lots of white smoke. He said to replace the engine. Perhaps so but is there anything to try before dropping thousands into another engine? I've seen online where some have had success by removing the spark plug and pouring in a quarter-ounce or so of oil or transmission fluid - then turning the engine over a couple of times to allow the oil to re-lube the cylinder wall. Maybe wouldn't hurt to try. Have any of you had success with this or any other similar procedure? Thanks in advance.
FTE Community Team
Joined: Jan 2019
Posts: 10,725
Likes: 1,496
Takes a lot of gasoline to do that, but it is possible.
Did he give compression readings for all ten cylinders?
Makes some sense to try what you're talking about, but use normal engine oil. I'd use 10W30 and let it sit for at least a couple of days. Don't try to turn it over with the spark plug installed until you know that all the oil is out of that cylinder (except residue).
Sitting here on the other side of the Internet, I don't know you or your mechanic or your truck. I wonder if the mechanic is sure that the rings are the issue. Could it be a valve instead? How did the mechanic come to this conclusion?
That being said, if it was doing this for a long time, your mechanic might be right. V-10s seem to be expensive these days, and almost all of them are well-beaten. You might be better off getting yours overhauled.
Did he give compression readings for all ten cylinders?
Makes some sense to try what you're talking about, but use normal engine oil. I'd use 10W30 and let it sit for at least a couple of days. Don't try to turn it over with the spark plug installed until you know that all the oil is out of that cylinder (except residue).
Sitting here on the other side of the Internet, I don't know you or your mechanic or your truck. I wonder if the mechanic is sure that the rings are the issue. Could it be a valve instead? How did the mechanic come to this conclusion?
That being said, if it was doing this for a long time, your mechanic might be right. V-10s seem to be expensive these days, and almost all of them are well-beaten. You might be better off getting yours overhauled.
FTE Leadership Emeritus
Joined: Sep 2003
Posts: 12,246
Likes: 761
From: Houston, Texas
I agree with getting it rebuilt, trying to find a long block for a reasonable price isn't easy. As long as you don't have any other issues, rings, a seal kit, and some machining should make this overhaul a success. Just don't go cheap on the parts, buy Motorcraft from Rock Auto or order them from a dealership online.
Tuned
Joined: Jun 2001
Posts: 271
Likes: 4
From: Central Texas
I had this happen to an Acura Legend that I owned in the late 90s. Just lots of white smoke and gas being dumped, and a little hard to start. I replaced the injector and just sent it. It was a little down on power and not quite as smooth, but overall it was fine until I sold it a couple of years later. Didn't have a noticeable increase in oil burning or anything like that.
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