On Feb 13, 8:09 am, "trad...@[EMAIL PROTECTED]
" <trad...@[EMAIL PROTECTED]
>
wrote:
> On Feb 12, 11:56 pm, "Tiger" <tiger0...@[EMAIL PROTECTED]
> wrote:
>
> > Only one time for my car... 95.
>
> This is something I've always wondered about too. Many here
> recommend cycling the glow plugs several times before trying to start
> the car in cold weather. I've rarely done that and can't say I
> noticed any difference. And if you think about it, I'm not sure it
> will do any good. All the glow plugs are really designed to do is
> get the very tip hot to serve as an ignition source. The indicator
> light is designed to go out about the time that has occured. After
> that, they stay on for probably another 2 mins or so anyway. So,
> I'm not sure what cycling them several times is going to accomplish.
> Certainly they can't raise the temp of the cylinder head much at all.
> And any air that is heated is quickly expelled and refilled during
> cranking.
Only one for my car as well. 84 with over 268k miles on it.
Although the glow plugs aren't an ignition source. They are a pre-
heater. They heat the pre-chamber (a smaller cavity above the
cylinder), which is where the fuel is injected into, and they heat it
very well. They don't have to heat the whole block or head, just this
pre-chamber.
As far as cycling them goes. I don't think it helps to do this. As you
said, they stay on for a couple of minutes anyway. I have noticed that
the light stays on longer when the ambient temperature is lower, and
it stays on a very short period of time when the engine is warm, or
outside air is warm. I have found on my car, that in below freezing
temps, I need to wait a few more seconds after the light goes off, or
just give a slight throttle when it starts. Otherwise, it starts first
time every time.
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