coolant flushing, refilling

[rob hod]

    I'm prolly coming in late on this one, but there's a big difference
between running the car with the coolant cap on and running with it off.

    Typically systems are run with around 13psi caps on, the result being
that the boiling temp of the coolant is raised substantially by the time the
pressure is close to that point. Not only that, at normal temps and usage
there will be a pressure increase and the coolants effectiveness is
increased. All this happens even with good ole tap water before you start
adding anything clever.

    Running without a cap increases the chance off localised overheating
(e.g. geyser effects!)

    My 0.02 GBP no doubt soon to be EUR

    HTH

rob
----- Original Message ----- > Message: 13
> Date: Sun, 18 Aug 2002 19:50:04 -0400
> From: Huw Powell <human747 at attbi.com>
> Reply-To: human747 at attbi.com
> Organization: HUMAN Speakers
> To: Brett Dikeman <brett at cloud9.net>
> Cc: quattro at audifans.com
> Subject: Re: coolant flushing, refilling
>
>  snippage
> > It never boils over with the cap on, so my thought is this- is the
> > Bentley procedure really only for when you've got water AND coolant
> > in the engine, not just water?
>
> Water won't work, it can't handle the temps and will boil over,
> basically.
>
> --
> Huw Powell
>