Smoking 360
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Senior User
Joined: Mar 2007
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From: arkadelphia, ar
Smoking 360
A little history: Truck sat 20 years. Changed oil, plugs, wires etc, and got it running. Used 10/30 and Marvel when I changed, and squirted a little in the cyl. before trying to start it. I have run it in 4 separate occasions for 15-20 min each. The truck smoked pretty bad, especially on one side.
Today changed the oil and filter again and used 10/40 and Lucas. Surprisingly, when I started after the oil change there was little if any smoke.
By the way the engine sounds very smooth and starts right up, almost like fuel injected.
I took it on it's first test drive and no smoke until I had to climb a fairly steep short hill. As soon as I loaded it up to maintain the hill, here came the smoke.
I'm fairly sure it needs valve seals, which can be done without removing anything, but does this sound like stuck rings? There is no appreciable noise such as knocking or ticking. I am getting some black liquid residue from the exhaust but I have attributed that to the cleaners I used but don't know.
Any ideas or thoughts?
Today changed the oil and filter again and used 10/40 and Lucas. Surprisingly, when I started after the oil change there was little if any smoke.
By the way the engine sounds very smooth and starts right up, almost like fuel injected.
I took it on it's first test drive and no smoke until I had to climb a fairly steep short hill. As soon as I loaded it up to maintain the hill, here came the smoke.
I'm fairly sure it needs valve seals, which can be done without removing anything, but does this sound like stuck rings? There is no appreciable noise such as knocking or ticking. I am getting some black liquid residue from the exhaust but I have attributed that to the cleaners I used but don't know.
Any ideas or thoughts?
Fleet Owner
Joined: Jun 1999
Posts: 24,552
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From: Creedmoor, North Carolina
Blue smoke or black smoke, you didn't say? Running an engine after 20 years of resting is risky at best. Many things tend to get gummed up in that much time. You may need to get 3-5,000 miles on the engine before you will know if it is going to be a keeper or not. IMHO
John
John
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Generally speaking, when you apply power (gas) and the engine smokes, the rings are suspect; under high vacuum such as coasting down hill, the valve guides and seals are suspects.
I once knew an old farmer who had similar troubles with an old 292. His solution was simple -he filled the crankcase with diesel fuel and let it idle for 5 or 10 minutes, then refilled with oil. Effective, but not recommended!
I once knew an old farmer who had similar troubles with an old 292. His solution was simple -he filled the crankcase with diesel fuel and let it idle for 5 or 10 minutes, then refilled with oil. Effective, but not recommended!
Logistics Pro
Joined: Oct 2005
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From: Mddl A MexCans
I'd just run it for about 2k change the oil about every 700 and let the fresh oil do it's job. Hopefully it's just carbon holding the rings hostage.
Diesel will dislodge a bunch **** you do not want getting in the bearings. DO NOT PUT DIESEL IN A MOTOR THAT SAT FOR 20 YEARS.
Diesel will dislodge a bunch **** you do not want getting in the bearings. DO NOT PUT DIESEL IN A MOTOR THAT SAT FOR 20 YEARS.
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Joined: Mar 2007
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From: arkadelphia, ar
Originally Posted by jowilker
Blue smoke or black smoke, you didn't say? Running an engine after 20 years of resting is risky at best. Many things tend to get gummed up in that much time. You may need to get 3-5,000 miles on the engine before you will know if it is going to be a keeper or not. IMHO
John
John
Fleet Mechanic
Joined: Aug 2007
Posts: 1,810
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From: Piney Woods of East Texas
Going up hill and adding more throttle would lend to bringing the Power Valve in to play. My guess is that it richened up. Depending on grade it could have a oil passage restricted on the heads and started sucking oil around the valve guides. But it would have to be a awlfull steep grade.
Fleet Owner
Joined: Jun 1999
Posts: 24,552
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From: Creedmoor, North Carolina
Originally Posted by ramarado
I'd say white!
Likely it is light blue and that is oil burning smoke. Black is too much gas.
John
