[ROVERNET - UK] Vapor lock

Warwick Brooks warwick at regscom.com.au
Tue Oct 23 09:42:05 BST 2007


My experience comes from the Range Rover engine from the early '70s to the
late '80s.  I am new to Rover cars having only acquired a P5B relatively
recently, so I will answer this generally and with the Range Rover in mind
and hope that someone with car engine experience jumps in.  There may be
subtle differences between the engines.

If I was adding an expansion tank I would use the unpressurized type that
connects to the radiator's overflow outlet.  This type of tank/bottle relies
on water being pushed out past the radiator cap and then drawing it back in
when the system cools.  The standard cap has to be replaced with one without
the vacuum-break valve or by rendering the valve in a standard cap

Hope this helps and that someone else picks up from here.


-----Original Message-----
From: rovernet-bounces at lyris.ccdata.com
[mailto:rovernet-bounces at lyris.ccdata.com] On Behalf Of denlet
Sent: Monday, 22 October 2007 11:26 PM
To: rovernet at lyris.ccdata.com
Subject: [ROVERNET - UK] Vapor lock


Is it a good solution to fit this hose on (or to ) an expansion chamber to
have complete results ( like in a SD1 ).

    best regards        denis

> Hello Denis,
> It has a different purpose.  It allows air trapped at the top of the water
> jacket in the inlet manifold to escape into the top of the radiator.  A
> consequence of this is that a small amount of water constantly flows
> the hose back to the radiator.  The blockage caused by corrosion deposits
> can eventually block the hole and so air can become trapped.
> Regards,
> Warwick.

rovernet mailing list
rovernet at lyris.ccdata.com
To unsubscribe, go to this web page, look near the bottom and follow
Back-up list and photos at:

More information about the rovernet mailing list