Piston ouch
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Freshman User
Joined: Mar 2002
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Piston ouch
I have an 86 BII with 2.9
I rebuilt the engine two years ago. I also drive another truck, so I have probably put on 5,000 miles.
Somehow I got a piece of metal into the #5 cylinder. I took the head off and the piston is cracked.
All I can think of, is there was a washer I dropped when I was putting the engine back together. I hope it did not come from anywhere else.
Has anyone heard of pieces of steel in a cylinder?
If nothing else, you can have a great weekend, knowing you are not re-re-building an engine.
:-X11
I rebuilt the engine two years ago. I also drive another truck, so I have probably put on 5,000 miles.
Somehow I got a piece of metal into the #5 cylinder. I took the head off and the piston is cracked.
All I can think of, is there was a washer I dropped when I was putting the engine back together. I hope it did not come from anywhere else.
Has anyone heard of pieces of steel in a cylinder?
If nothing else, you can have a great weekend, knowing you are not re-re-building an engine.
:-X11
Elder User
Joined: Aug 2000
Posts: 763
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From: home
Piston ouch
I have seen pistons cracked by valves that have dropped after the valve keepers let go. Also seen parts of a spark plug imbedded in the piston that was destroyed by severe detonation. Besides destoying the piston the cylinder wall was scored & the rod bent. You are probably right on what happened. 
Post Fiend
Joined: Jan 2002
Posts: 5,859
Likes: 7
From: USA
Piston ouch
>I have seen pistons cracked by valves that have dropped
>after the valve keepers let go. Also seen parts of a spark
>plug imbedded in the piston that was destroyed by severe
>detonation. Besides destoying the piston the cylinder wall
>was scored & the rod bent. You are probably right on what
>happened.
I've seen bad casting in the cylinder walls or airpockets inthe
casting let go and get popped out into the combustion chambers
makes for a real mess!
Rich
Ford Trucks Built Tough!
not with rocks
Watch out "X" Mayor of Truckville
>after the valve keepers let go. Also seen parts of a spark
>plug imbedded in the piston that was destroyed by severe
>detonation. Besides destoying the piston the cylinder wall
>was scored & the rod bent. You are probably right on what
>happened.
I've seen bad casting in the cylinder walls or airpockets inthe
casting let go and get popped out into the combustion chambers
makes for a real mess!
Rich
Ford Trucks Built Tough!
not with rocks
Watch out "X" Mayor of Truckville
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