I think the effects on battery and starter motor while real and true, aren't the serious issue.
The big difference is in the amount of unburnt fuel washing the oil off the bores. If pre-heat works properly, the engine starts more easily **and** continues to run smoothly, burning the fuel that is injected properly. If you make a habit of starting without allowing full pre-heat, then you should also be saving up for a re-bore and new pistons!
Number_Cruncher
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Cheers all.
Completely forgot to pay attention to the light this morning; reverted to HDi 'Wot glow plug light?' behaviour.
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Shouldn't really put any extra strain on the battery, as glow plugs stay on for several secs after the lamp goes out. In fact, they can be energised for a few minutes on some cars after a cold start, for emmissions purposes.
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Yes, nearly all cars glow while cranking anyway.
According to Beru's website, most have preheat, cranking heat and post start heat, how much of each depends on application and temperature.
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15 years ago or so a colleague had a Cav 1.7 TD, used to complain about how hard it was to start, she (no, I am not being sexist as it happends it was a she) had had it a year or so before some mentioned the glowplug light, "glowplug?", "light?", "wait 10 seconds? "I have just been putting the key in and starting it". Problem solved.
About the same time another colleague complained about how slow their Cav TD was, after a few weeks listening to their moaning and getting frustrated by their dismissal of my advise to take it to the dealer I took it for a drive and after moving the footwell mat from under the accelerator found that it went as well as the rest of them!
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The big difference is in the amount of unburnt fuel washing the oil off the bores. Number_Cruncher
Surely NC diesel is a fairly good lubricator, it is much more of a problem flooding a petrol engine for this reason.
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The worst aspect is probably air polution, my 405 smokes quite a bit for about 5 seconds if I don't wait for the plugs.
Steve.
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Xantia HDi.
Buy a Citroen and get to know the local GSF staff better...
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