On 10 jul, 15:38, "R.C. Payne"  wrote:
> Paul Scott wrote:
> > "Mortimer"  wrote in message
> >news:yuidnbrWDL8HmOvVnZ2dnUVZ8uadnZ2d@posted.plusnet...
> >>"R.C. Payne"  wrote in message
> >>news:g54vmd$aa$1@gemini.csx.cam.ac.uk...
>
> >>>I've never run a diesel road vehicle, but for the marine engines (on
> >>>yachts) that I've played with, you run the glow plugs for a couple of
> >>>seconds before trying to start in cold weather.  That generally does the
> >>>trick for the engines I've needed to use.  Then you check the exhaust to
> >>>make sure the cooling water is coming out.
> >>Cooling water coming out of the exhaust? Eh?
>
> > Fairly common on seagoing boats, even now. Without a radiator, engine
> > coolant passes through a sea water heat exchanger system . The sea water is
> > also injected into the exhaust flow somewhere, to cool & silence the exhaust
> > gases, being ejected from the boat through the exhaust pipe, which because
> > of the cooling can be a flexible hose, or contain plastic components.
>
> And the reason for checking is that the cooling water inlet can become
> fouled by various things floating in the sea.  If your intake is fouled> then you lose your cooling flow, and Bad Things will happen.  Standard
> kit on a boat is spares for things like the inlet filters and impellers.
>   The surrounding water is a much better heat sink than the surrounding
> air, and marine engines have taken advantage of this for a long time
> (for condensers in steam days, for cylinder cooling in diesel days).
>
> >>I'm intrigued by my Peugeot HDi engine. Unlike the older non-Turbo,
> >>non-direct-injection engine on my previous Peugeot 306, it's not necessary
> >>to wait a couple of seconds for the glow-plugs to heat up and the light to
> >>go out: you can get in, turn the key and the engine will start and you can
> >>drive straight off, even if the engine is cold and the ambient temperature
> >>is cold - exactly like a petrol engine, but without the sluggishness and
> >>fading on accelerating that I always used to get with petrol engines until
> >>the engine had warmed up a bit.
>
> > Higher compression ratio, so that even in coldest weather there is no need
> > for preheat. My boat engine is like this - starts instantly all year round.
>
> Except when you are caught on a lee shore, being swept onto rocks by the
> tide, with a big container ship bearing down on you, and you need the
> engine to start in a hurry.  Then it won't start at all :-)
>

Must be the same as the one I've got in my boat.
NM