Date: Wed, 15 Mar 2000 05:01:53 -0800
Reply-To: steve delasalle <sdelasal@YAHOO.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: steve delasalle <sdelasal@YAHOO.COM>
Subject: Re: Cooling System Pressure
Content-Type: text/plain; charset=us-ascii
appologies for the format .. I promise not to 'cut &
paste' again!
--- steve delasalle <sdelasal@YAHOO.COM> wrote:
> errrr..this conflicts with the advice given on sure
> Tests for the Cooling System
> TEST #2
> DO'S & DON'TS
> FOR
> head REMOVAL
> WORDS TO THE WISE
> PARTS NEEDED TO
> REASSEMBLE
> PARTS # list
> PARTS: HARDWARE
> TIME TO REASSEMBLE
> PUSH RODS
> BLEEDING THE
> COOliNG
> SYSTEM
> THE LAST DETAILS
> TOOLS NEEDED FOR
> head REPLACEMENT
> FINAL NOTES
>
>
>
> So you're thinking its
> time
> to replace the heads on
> your
> water boxer, and you're
> asking yourself if you
> can
> do a job like this.
> Can
> this
> be done on the ground
> without a lift? I
> will
> try to
> help you answer these
> questions. First, lets
> go over
> the most common reasons
> to
> remove the cylinder
> heads.
> Make sure to be clear
> about
> what's leaking before
> you
> begin the job. It can
> be
> oil or
> coolant that's dripping
> from
> the heads.
>
> Washing the engine is very
>
> helpful when looking for leaks.
>
> If the push rod tubes are
>
> leaking or if a lifter has
>
> collapsed, you can use an
>
> expanding push rod tube,
>
> which is available at the dealer
>
> for $50 each, or in the
>
> aftermarket for about half of
>
> that.
>
>
> The most common coolant
>
> leak is from a cracking or
>
> splitting rubber outer coolant
>
> gasket at the head.
>
>
> Often this will be accompanied
>
> by a corrosive reaction where
>
> the rubber gasket contacts
> the
>
> head. Unfortunately, there
> is
>
> no easy way out of this
> repair.
>
>
> The heads must be removed to
>
> replace these gaskets, and at
>
> this time a close inspection
> of
>
> the heads will indicate the
>
> extent of corrosion. A
>
> corroded head will not make
>
> the best possible seal with
> the
>
> gasket.
>
>
> Another reason the heads may
>
> need to be removed is
>
> pressure build up in the
> cooling
>
> system.
>
>
>
> This is do to the head
> gasket at
> the top of the cylinder
> leaking
> compression when the
> engine
> is cold.
>
> TEST #1: Pressure Tests
> for the Cooling System
>
> The first test of the
> cooling
> system is done when the
> engine
> is cold. A cooling
> system
> pressure tester can be
> installed
> in place of the
> radiator
> cap.
> Pressure in the cooling
> system
> and hot coolant are not
> something to be treated
> lightly.
> Use caution, and never
>
> remove the radiator cap from
>
> a engine that has been run
>
> even for even a short time.
>
> After installing the gauge,
>
> pump it up to 10 pounds.
>
> Look around for leaks if the
>
> gauge shows any pressure
>
> loss.
>
>
> Common trouble spots
>
> include heads, hoses, water
>
> pump and rear heater core. If
>
> you smell something sweet
>
> when you turn the heater fans
>
> on, it may be a coolant leak
>
> at one of the heater cores, or
>
> simply the O-ring at the rear
>
> heater
>
> valve leaking. Because there
> is
>
> often more then one leak in
>
> the system, it is necessary
> to
>
>
=== message truncated ===
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