wet stacking
Post Fiend
Joined: Oct 2003
Posts: 5,903
Likes: 1
From: MICHIGAN
It's usually not a concern with our trucks, big rigs or heavy equipment may experience it but it's rare.
Wet stacking occurs when the engine is run cold at too light of a load (idleing). This causes unburnt fuel and oil to collect in the exhaust system and forms a black tar-like substance and can leak out any loose exhaust joints.
If you run a new engine at light loads and/or idle for too long, the rings will may seat properly. That's not a concern on this forum though, Is it?? LOL
Wet stacking occurs when the engine is run cold at too light of a load (idleing). This causes unburnt fuel and oil to collect in the exhaust system and forms a black tar-like substance and can leak out any loose exhaust joints.
If you run a new engine at light loads and/or idle for too long, the rings will may seat properly. That's not a concern on this forum though, Is it?? LOL
Fleet Owner
Joined: Jan 2004
Posts: 26,007
Likes: 575
From: Brentwood,CA
Originally Posted by Cuda_jim
It's usually not a concern with our trucks, big rigs or heavy equipment may experience it but it's rare.
Wet stacking occurs when the engine is run cold at too light of a load (idleing). This causes unburnt fuel and oil to collect in the exhaust system and forms a black tar-like substance and can leak out any loose exhaust joints.
If you run a new engine at light loads and/or idle for too long, the rings will may seat properly. That's not a concern on this forum though, Is it?? LOL
Wet stacking occurs when the engine is run cold at too light of a load (idleing). This causes unburnt fuel and oil to collect in the exhaust system and forms a black tar-like substance and can leak out any loose exhaust joints.
If you run a new engine at light loads and/or idle for too long, the rings will may seat properly. That's not a concern on this forum though, Is it?? LOL
Thats close but not correct. The unburnt fuel builds on top of the piston and coolas the chamber off. This starts the chain reaction. Fuel is then allowed to stack on top of the previous unburnt fuel charge. The liquid fills the chamber and because fuel does not compress something must give and in most cases its the connecting rod.You end up with a blown engine.
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Posting Guru
Joined: Nov 2003
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From: THUNDER BAY
My father in law works is the forest Industry and was telling me that the chippers they run out there have 12 cylinder diesels and if they Idle too long the will puke oil and fuel out the exhaust he said it happens often kinda interested me so I have been all over the net checking this topic out because of the problem I have been having and in some of the forums from other sites guys talk about older 7.3,s having this problem? I have never seen it myself so I figured I would ask you guys
thanks for the Info
thanks for the Info
Elder User
Joined: Nov 2005
Posts: 555
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From: Cincinnati OH
big truck drivers idle a LOT. the only time I have ever seen any fluids leaking out the exhaust was an indirect symptom of another more serioius problem like a split injector tip or blown turbo causing large amounts of oil or fuel to run through the cylinders. i dont see how a running engine could have burnt or unburnt anything left in the cylinders.
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Posting Guru
Joined: Nov 2006
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From: Herndon KY
we had to worry about it on long down hill runs 15-20 minutes plus with empty cattle trailers, the engines would cool so much that unburnt fuel was being pushed out the exhaust valve and leaking all over the place, with a full load the Jake would burn the fuel and keep the engine warm.
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Posting Guru
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From: Herndon KY
Yeah I've never heard of it building in the cylinder but there is a whole lot of stuff I have never heard of, but I do know that in colder temps sometimes our trucks would stall after running light down the mountain, so we would alway hit the jake whether it needed it or not before pushing in the clutch or slipshifting a gear, cause they would die cold turkey and that is scary, thank goodness for air brakes instead of vacuume, cause you don't have power steering.
Post Fiend
Joined: Apr 2004
Posts: 12,835
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From: Silver Lake Dunes, MI
Wet stacking can also wash the cylinder walls of lubrication. But we don't have much worry about that with our trucks that I have heard. If you do have to idle for long periods in cold weather high idle would be a good mod to do.
Postmaster
Joined: Jan 2004
Posts: 3,207
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From: Kearney, Nebr
During prolonged idle periods you should always have the high idle on. I've never seen happen on never engines, but have on a couple old NA ones where the diesel is just dripping out of the intake manifold.
Post Fiend
Joined: Oct 2003
Posts: 5,903
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From: MICHIGAN
Originally Posted by scatgo
A few times I heard pepole say they put there truck in high idel but never heard about the mod. Can you fill me in on this one.
Latter.....
Latter.....
https://www.ford-trucks.com/forums/6...a-97-auto.html