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Old 25 November 2009, 12:07   #41
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Oh I think we will see her back in action again

Pete
What Are you taking sole possession again
Nice pic by the way, whatever happened to those lovely summer days?
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Old 25 November 2009, 12:08   #42
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Oh I think we will see her back in action again

Pete
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Old 25 November 2009, 12:19   #43
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Diesel engines rely on the heat generated by compression to ignite the diesel fuel, and control the engine revs by varying the quantity of fuel injected.

If the quantity of fuel injected is not restricted, the engine revs will rise (ie it will run away). A diesel engine is not fussed where it gets its fuel from, or what fuel it gets - a blown turbo or other failure that releases lube oil into the engine's air intake provides a great source of fuel.

Under these circumstances, shutting down the diesel supply or electrical supply will have no effect - the only thing that will work is cutting out the air supply - firing a CO2 extinguisher down the air intake is usually effective.

Be grateful that the engine remained intact - sometimes a piston or crank will let go and the ensuing shrapnel can be somewhat hazardous to health.

Cheers

Chris
Couldn't you just stick it in gear with foot on brakes and dump the clutch?
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Old 25 November 2009, 12:22   #44
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Oh I think we will see her back in action again

Pete
so mister how come you never got 29 knts out of the old girl
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Old 25 November 2009, 12:28   #45
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so mister how come you never got 29 knts out of the old girl
Oh we did, but had to slow down for you as Susie aged 11 at the time was driving a bit too quick

Pete
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Old 25 November 2009, 12:48   #46
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i wasnt talking about your disco-very
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Old 25 November 2009, 13:25   #47
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Exactly like that. Personally I wouldn't return to the car.
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Old 25 November 2009, 14:50   #48
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Couldn't you just stick it in gear with foot on brakes and dump the clutch?
I suppose you might be able to in theory with a car, although I suspect the outcome could be somewhat unpredictable - there is an awful lot of energy that has to go somewhere - in terms of shock loading probably more than a clutch could take.

My only experience of a runaway diesel was a marine engine - I'm just glad it wasn't me with the short straw holding the CO2 fire extinguisher

Cheers

Chris
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Old 25 November 2009, 16:14   #49
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I suppose you might be able to in theory with a car, although I suspect the outcome could be somewhat unpredictable - there is an awful lot of energy that has to go somewhere - in terms of shock loading probably more than a clutch could take.

My only experience of a runaway diesel was a marine engine - I'm just glad it wasn't me with the short straw holding the CO2 fire extinguisher

Cheers

Chris
Better to wreck a clutch trying than the entire engine.
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Old 26 November 2009, 12:54   #50
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James, take care when you swop out the engines. Some of those marinising parts are very expensive. In particular the phosphor bronze raw water pumps are about 600 each which is why they can run out of water for 5 minutes.

Pete
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