should it do that.....i don't know
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Junior User
Joined: Jul 2003
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should it do that.....i don't know
I went to check out a '03 7.3 SD the other day. It didn't seem to have a lot of surge when I accelerated to freeway speeds. Kind of lazy feeling. Didn't smoke out the back though. It did have a front end clunking sound going over the parking lot speed bumps. I opened the oil fill cap while it was idling and it blew a plume of vapor/oil about 9' high like a steam engine puffing. Held my hand over it and got a oil wet palm after just a few seconds. I'm hesitant to drop any $$ on it. advise?? thanks
Post Fiend
Joined: Mar 2007
Posts: 26,966
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From: Texas
When you say puffing, do you mean visual smoke like a chimney or pressure that you can feel? Flip the oil cap upside down with the engine at idle and see what it does.
If it vibrates and slides off the fill tube, I wouldn't worry about the amount of smoke. My truck will smoke different amounts depending on oil temp, outside temp, oil type, miles on oil, etc. The oils smell different too. It's acted that way for the last half million miles or so.
If the oil cap shoots up into the air and there's pressure behind the smoke, then don't sink anything into it. Time to look at a rebuild or used engine.
If it vibrates and slides off the fill tube, I wouldn't worry about the amount of smoke. My truck will smoke different amounts depending on oil temp, outside temp, oil type, miles on oil, etc. The oils smell different too. It's acted that way for the last half million miles or so.
If the oil cap shoots up into the air and there's pressure behind the smoke, then don't sink anything into it. Time to look at a rebuild or used engine.
FTE Leadership Emeritus
Joined: May 2014
Posts: 27,355
Likes: 5,951
From: Lake Hartwell, GA
The clunking sound is probably the front sway bar end links. Get under it and check the bushings on them, they are probably worn to the point of failure. That is an easy fix, the blow by is your biggest concern at this point.
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Junior User
Joined: Jul 2003
Posts: 73
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When you say puffing, do you mean visual smoke like a chimney or pressure that you can feel? Flip the oil cap upside down with the engine at idle and see what it does.
If it vibrates and slides off the fill tube, I wouldn't worry about the amount of smoke. My truck will smoke different amounts depending on oil temp, outside temp, oil type, miles on oil, etc. The oils smell different too. It's acted that way for the last half million miles or so.
If the oil cap shoots up into the air and there's pressure behind the smoke, then don't sink anything into it. Time to look at a rebuild or used engine.
If it vibrates and slides off the fill tube, I wouldn't worry about the amount of smoke. My truck will smoke different amounts depending on oil temp, outside temp, oil type, miles on oil, etc. The oils smell different too. It's acted that way for the last half million miles or so.
If the oil cap shoots up into the air and there's pressure behind the smoke, then don't sink anything into it. Time to look at a rebuild or used engine.
More Turbo
Joined: Jan 2006
Posts: 687
Likes: 15
From: Lake Charles, LA
There is no way the cap "would", says that you havent tried it yet. Not saying this is the case, but often regarding this issue looks can be deceiving. Ive got 322k, and i can visually see a plume coming from my fill tube, but when i turn the cap over, it just sits there. Only way to know for sure is to do it, dont assume..... just my two cents... but since its not yours and anticipating the purchase, depending on distance from you, i guess use your best judgement and gut feelings though...
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