thought you had engine problems
Post Fiend
Joined: Jul 2005
Posts: 6,127
Likes: 6
This is for the benefit of Ford Reman / Failure Analysis
Most probable cause of failure is a sleeve for the injectors failed, leading to a trickle coolant leak into a cylinder when the engine was shut down hot.
Other sleeved parts where the sleeve blocks coolant flow should also be investigated.
What then happened when the engine shut down was coolant leaked and filled the cylinder under coolant pressure.
When the engine was restarted, the first stroke expelled much of the coolant into the exhaust manifold, filling several cylinders with coolant at the same time. Then on the next upstroke, the original filled cylinder self destructed.
As the engine continued to rotate, multiple cylinders hydrolocked.
Hence, the destruction occurred at the rods, etc. and there is so little signs of damage elsewhere at the crankshaft, etc.
What this suggest is there is a real quality control issue in the reman process at Ford Reman or whoever the contractor is.
Other sleeved parts where the sleeve blocks coolant flow should also be investigated.
What then happened when the engine shut down was coolant leaked and filled the cylinder under coolant pressure.
When the engine was restarted, the first stroke expelled much of the coolant into the exhaust manifold, filling several cylinders with coolant at the same time. Then on the next upstroke, the original filled cylinder self destructed.
As the engine continued to rotate, multiple cylinders hydrolocked.
Hence, the destruction occurred at the rods, etc. and there is so little signs of damage elsewhere at the crankshaft, etc.
What this suggest is there is a real quality control issue in the reman process at Ford Reman or whoever the contractor is.
Thread Starter
|
Post Fiend
Joined: Oct 2009
Posts: 12,123
Likes: 35
From: N. Fort Worth, tx
Most probable cause of failure is a sleeve for the injectors failed, leading to a trickle coolant leak into a cylinder when the engine was shut down hot.
Other sleeved parts where the sleeve blocks coolant flow should also be investigated.
What then happened when the engine shut down was coolant leaked and filled the cylinder under coolant pressure.
When the engine was restarted, the first stroke expelled much of the coolant into the exhaust manifold, filling several cylinders with coolant at the same time. Then on the next upstroke, the original filled cylinder self destructed.
As the engine continued to rotate, multiple cylinders hydrolocked.
Hence, the destruction occurred at the rods, etc. and there is so little signs of damage elsewhere at the crankshaft, etc.
What this suggest is there is a real quality control issue in the reman process at Ford Reman or whoever the contractor is.
Other sleeved parts where the sleeve blocks coolant flow should also be investigated.
What then happened when the engine shut down was coolant leaked and filled the cylinder under coolant pressure.
When the engine was restarted, the first stroke expelled much of the coolant into the exhaust manifold, filling several cylinders with coolant at the same time. Then on the next upstroke, the original filled cylinder self destructed.
As the engine continued to rotate, multiple cylinders hydrolocked.
Hence, the destruction occurred at the rods, etc. and there is so little signs of damage elsewhere at the crankshaft, etc.
What this suggest is there is a real quality control issue in the reman process at Ford Reman or whoever the contractor is.
also we know from experance that if we have enugh liquid to hydro a cyclinder it will bend only one rod at start up (think 6.4L and #8 rod)
this was a case of over rev on the engine.
Lead Driver
Joined: Feb 2005
Posts: 7,963
Likes: 2,662
From: The Great State of Texas
good theory but not at all the case. the one issue with this theory is that would have happened much slower and would not ever kick the keepers out of the valve spriong retainers.
also we know from experance that if we have enugh liquid to hydro a cyclinder it will bend only one rod at start up (think 6.4L and #8 rod)
this was a case of over rev on the engine.
also we know from experance that if we have enugh liquid to hydro a cyclinder it will bend only one rod at start up (think 6.4L and #8 rod)
this was a case of over rev on the engine.
) with similar results.
Thread
Thread Starter
Forum
Replies
Last Post
bulabula
Big Block V8 - 385 Series (6.1/370, 7.0/429, 7.5/460)
6
Oct 11, 2001 10:24 PM
