The Unknowable Issue!
Hotshot
Joined: Dec 2005
Posts: 10,253
Likes: 7,684
From: Chino Valley, Arizona
Hotshot
Joined: Dec 2005
Posts: 10,253
Likes: 7,684
From: Chino Valley, Arizona
Diesel burns slow which is why everything in the engine can handle the high pressures. either burns instantly and shocks the rings and can crack them, once they crack they don't seal anymore.
Lead Driver
Joined: Apr 2016
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From: Bahstun
HUH, diesels run leanest at idle AKA starting up
there is nothing to restrict air flow to regulate fuel to air ratio like that on a gas powered engine
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
I have 70"s vintage case 188 350 that needed starting fluid every time I started it till I replaced the starter ( have had it for 34 years ) . My 70's vintage case 188 580C came factory equipped with a starting fluid applicator . Has never needed it .
(20 years ) .
Back to the pic . I would bet the piston cracked from the wrist pin, then there would be a path to the rings . The top of the piston being beat to death is beyond me .Believe what you wish .
BTW don't "HUH" me .
Hotshot
Joined: Dec 2005
Posts: 10,253
Likes: 7,684
From: Chino Valley, Arizona
Not too sure about too lean at startup . Thats when they smoke the most . (Obviously not lean ) Since they need compression to create heat , a less than capable motor takes longer . The turbo is spooling slow at startup so regulated air does not apply .My statement about octane still stands . GPs can ignite starting fluid sooner than the valves closing completely causing detonation at much lower compression .The explanation was (No GPS ) The picture of the piston is not from a shot or two of ether (Or a year) . If it was it would be all 8. That piston was a problem long before ether was added .
I have 70"s vintage case 188 350 that needed starting fluid every time I started it till I replaced the starter ( have had it for 34 years ) . My 70's vintage case 188 580C came factory equipped with a starting fluid applicator . Has never needed it .
(20 years ) .
Back to the pic . I would bet the piston cracked from the wrist pin, then there would be a path to the rings . The top of the piston being beat to death is beyond me .Believe what you wish .
BTW don't "HUH" me .
I have 70"s vintage case 188 350 that needed starting fluid every time I started it till I replaced the starter ( have had it for 34 years ) . My 70's vintage case 188 580C came factory equipped with a starting fluid applicator . Has never needed it .
(20 years ) .
Back to the pic . I would bet the piston cracked from the wrist pin, then there would be a path to the rings . The top of the piston being beat to death is beyond me .Believe what you wish .
BTW don't "HUH" me .
all of the pistons had broken rings, and the burnt out sides. this is the only one I kept.
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
Hotshot
Joined: Dec 2005
Posts: 10,253
Likes: 7,684
From: Chino Valley, Arizona
I didn't take a picture of the wrist pin when I rebuilt that engine as they were all in serviceable condition and went back in the engine.
starting fluid didn't "burn through the piston" the shock of it exploding can and does fracture the brittle rings, thus letting burning diesel to go past them.
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Lead Driver
Joined: Apr 2016
Posts: 7,213
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From: Bahstun
Not too sure about too lean at startup . Thats when they smoke the most . (Obviously not lean ) Since they need compression to create heat , a less than capable motor takes longer . The turbo is spooling slow at startup so regulated air does not apply .My statement about octane still stands . GPs can ignite starting fluid sooner than the valves closing completely causing detonation at much lower compression .The explanation was (No GPS ) The picture of the piston is not from a shot or two of ether (Or a year) . If it was it would be all 8. That piston was a problem long before ether was added .
I have 70"s vintage case 188 350 that needed starting fluid every time I started it till I replaced the starter ( have had it for 34 years ) . My 70's vintage case 188 580C came factory equipped with a starting fluid applicator . Has never needed it .
(20 years ) .
Back to the pic . I would bet the piston cracked from the wrist pin, then there would be a path to the rings . The top of the piston being beat to death is beyond me .Believe what you wish .
BTW don't "HUH" me .
I have 70"s vintage case 188 350 that needed starting fluid every time I started it till I replaced the starter ( have had it for 34 years ) . My 70's vintage case 188 580C came factory equipped with a starting fluid applicator . Has never needed it .
(20 years ) .
Back to the pic . I would bet the piston cracked from the wrist pin, then there would be a path to the rings . The top of the piston being beat to death is beyond me .Believe what you wish .
BTW don't "HUH" me .
HUH?
That white smoke is incomplete fuel and moisture vapors
compare 17:1 to a 7.3 that has 22:1
ether ignites around 360
internal combustion chamber heat generated surpasses 360 even on a 0 temp day with out GPs ( that where you see the lean smoke from)
17:1 might be 20-30 BTDC when it ignites but with 22:1 it happens much sooner which bends rods or blows starter off the block
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
HUH?
That white smoke is incomplete fuel and moisture vapors
compare 17:1 to a 7.3 that has 22:1
ether ignites around 360
internal combustion chamber heat generated surpasses 360 even on a 0 temp day with out GPs ( that where you see the lean smoke from)
17:1 might be 20-30 BTDC when it ignites but with 22:1 it happens much sooner which bends rods or blows starter off the block
That white smoke is incomplete fuel and moisture vapors
compare 17:1 to a 7.3 that has 22:1
ether ignites around 360
internal combustion chamber heat generated surpasses 360 even on a 0 temp day with out GPs ( that where you see the lean smoke from)
17:1 might be 20-30 BTDC when it ignites but with 22:1 it happens much sooner which bends rods or blows starter off the block
Show me proof , not maybe this or that . In another post the picture was of one piston . The comment was "all 8 were the same ". If all 8 were the same the engine would not even run on gas . If you just want to be right , you win .
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