Old Spice's dirty bottom... - Page 3

Ian M · 25 November 2009, 16:07

Quote:

Originally Posted by Pete7

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?

Jimbo · 25 November 2009, 16:08

Quote:

Originally Posted by Pete7

Oh I think we will see her back in action again

Pete

Hightower · 25 November 2009, 16:19

Quote:

Originally Posted by chris123

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?

Carl · 25 November 2009, 16:22

Quote:

Originally Posted by Pete7

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

Pete7 · 25 November 2009, 16:28

Quote:

Originally Posted by Carl

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

Carl · 25 November 2009, 16:48

i wasnt talking about your disco-very

spartacus · 25 November 2009, 17:25

Quote:

Originally Posted by mark_j

Like this.

http://www.youtube.com/watch?v=Fw2r_lIRgpY

Exactly like that. Personally I wouldn't return to the car.

chris123 · 25 November 2009, 18:50

Quote:

Originally Posted by Hightower

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

Hightower · 25 November 2009, 20:14

Quote:

Originally Posted by chris123

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.

Pete7 · 26 November 2009, 16:54

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

Jimbo · 26 November 2009, 22:46

Quote:

Originally Posted by Pete7

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

Cheers Pete - I'm not proposing to do the swap myself (if nothing else, the wiring loom has melted so will also need replacing - not sure if this will have to be rebuilt from scratch), but will definitely pass that on to whichever long suffering mechanic gets the job!

I am considering sending all three engines to Mermaid and requesting they build me one working one and keep the rest...

Jizm · 27 November 2009, 00:22

let me know if you need a hand with the loom.

doggypaddle · 27 November 2009, 11:54

may be worth doing a little modification to the new engine.
I have seen large petrol engine throttle bodies fitted to tractor pulling engine turbos intakes linked to the engine stop, so operation the stop shuts off air supply too.
In fact you used to be able to get an excess flow air valve made by Chalwyn who made the road lamps, when the engine over revved by any significant amount they shut off the air supply. they also protected against overboost too as they were operated by the air flow.
The main use for them was any diesel application where you couldnt stall a runaway, ie generators hydrostatic driven plant etc.

doggypaddle · 27 November 2009, 11:57

You can still get them

http://www.chalwyn.co.uk/EN/auto_air_intake/aisv1.html

Automatic overspeed air intake shut down (shut off) valves with automatic reset

CHALWYN D SERIES VALVES

Simple cost effective fully automatic engine overspeed protection valves requiring no mechanical or electrical connections. Models available to meet virtually all popular combinations of intake pipe sizes and engine rating.

Hightower · 27 November 2009, 12:06

Quote:

Originally Posted by doggypaddle

may be worth doing a little modification to the new engine.
I have seen large petrol engine throttle bodies fitted to tractor pulling engine turbos intakes linked to the engine stop, so operation the stop shuts off air supply too.
In fact you used to be able to get an excess flow air valve made by Chalwyn who made the road lamps, when the engine over revved by any significant amount they shut off the air supply. they also protected against overboost too as they were operated by the air flow.
The main use for them was any diesel application where you couldnt stall a runaway, ie generators hydrostatic driven plant etc.

I removed a quick warmup flap from the exhaust of my 3.1 TD Trooper a couple of months ago when swapping out a length of exhaust pipe. If you had a Vacumm pump on the engine (which you should) then this could be converted into an inlet shut off valve quite easily. It's free too

Hightower · 27 November 2009, 12:11

Quote:

Originally Posted by Hightower

I removed a quick warmup flap from the exhaust of my 3.1 TD Trooper a couple of months ago when swapping out a length of exhaust pipe. If you had a Vacumm pump on the engine (which you should) then this could be converted into an inlet shut off valve quite easily. It's free too

Photo's

doggypaddle · 27 November 2009, 12:36

its the same as the one i took off my isuzu 2.8td the butterfly probably wont seal properly or close completley enough to stop a runaway diesel

it would certainly slow it down though but you would need to block the little hole!
i guess though its a tad small for the intke on a 6.0 diesel which should really be 3"

Poly · 27 November 2009, 13:54

I may be completely wrong but I think old spice already has an air intake cut off connected to the kill cord (from vague memory of previous Pac22/Old Spice threads). Presumably she had gone bang by the time anyone realised there was a serious problem!

doggypaddle · 27 November 2009, 14:24

Quote:

Originally Posted by Polwart

Presumably she had gone bang by the time anyone realised there was a serious problem!

All the more reason to fit an automatic chalwyn one then

Hightower · 27 November 2009, 14:38

Quote:

Originally Posted by doggypaddle

its the same as the one i took off my isuzu 2.8td the butterfly probably wont seal properly or close completley enough to stop a runaway diesel

it would certainly slow it down though but you would need to block the little hole!
i guess though its a tad small for the intke on a 6.0 diesel which should really be 3"

Your right, it's only a 2" bore. I guess it's smaller than the exhaust on a Pac22 too?

I recon you'd do better by fitting a hinged spring loaded plate over the air intake and pulling a lever to release this in case of a problem if you wanted the cheap solution.