[Vwdiesel] Apologies to Roger

[Roger Brown]

Mark Shepherd wrote:
> 
> I've reread your posting and its logic is converging with my
> own.
> 
> I think if we can take a good reading 'X' between #2 and #1
> then with all plugs good;  voltage will be double 'X'
> between #3 and #2 and triple 'X' between #4 and #3.
> I shant work out the 'dead GP' combinations as this is
> workoutable...
> Sorry Roger..
> 
> BUT here's another 'bone'
>   A week ago I had a glowplug die and then having replaced
> it 2 others died 2 days later :(
> It has been said on this forum that GP death is probably not
> linked save for general communal aging... If these plugs are
> rated at 11 Volts and whilst 4 are loading the battery and
> starter cranking is also dragging the battery down applied
> Volts are not too far above this. If a plug dies however
> then what effect does this have? 0.25 of a volt? Thats some
> 5 % extra power applied to the remaining plugs.. and if 2
> were to die how much brighter is the interior light? maybe
> 0.5 Volt? or 10% more power to the last plugs...?
> So maybe this is telling me that I should always change all
> plugs when one or more dies??
> Mark(The Miser)UK

I always change out all 4 on mine, testing the old plugs on a 10A battery charger.  If it glows red hot, it goes into a spare
parts box, if not it is into the trash.  

--
   Roger