To Stag or Not To Stag - Page 4

Badger wrote:

I think you are being a tad pedantic there Dave, now if we had been
talking about the Imp engine....

Dave Plowman (News) wrote:


So where does it leak from?

Out of the *top* of the block perhaps?!...


                 Pump
                    V
        _O_              _O_    <cams
        \___\__[ ]__/___/    <heads
        l                        l
        l         Block       l
        l______________l

:Jerry: wrote:


http://www.rimmerbros.co.uk/stag/images/ld25a.gif

Thats the pump and housing, which are inserted into the top of the block.


It has to drain at a lower point than the top, the pump and cover are
virtually flush/lower in the block. The impeller is lower than the
housing flange and the housing steps into the block about 15mm.

The actual weep holes, in the brass cage (148454 - holes not shown in
diagram) are about 40-50 mm lower than the top bolt (149095), between
the impeller seal(water) (148332) and the lower oil (sump)(148501) seal.

The brass cage pushes into the block, sealing off the water jacket. and
  the lower seal the sump from the weep channel. (between the two O
rings which are shown, go onto the cage top and bottom)

The method used to let the weeping water out is through the block.

Yep! clear an muddy water :)

r

wrote:

Anywhere it feels like. ;-) I just wanted to help anyone who didn't know
the engine find the pump as it should certainly be checked for leaks.

--
*How much deeper would the oceans be without sponges? *

    Dave Plowman        dave@davenoise.co.uk           London SW
                  To e-mail, change noise into sound.

There is a "tell-tale" hole in the casting, I *think* to the rear of the
pump body. If coolant is leaking here, it will be visible in the valley area
and means the pump gland seals are about to fail. Don't confuse this with
leaking inlet manifold gaskets which also cause coolant to be visible in the
valley though.
Badger.

<snip>

Hmm, that's clear enough, assuming that you think a cesspit have
crystal clear water in them...

OK, how does one tell if it's the inlet manifold gasket leaking - and
don't say that coolant will be visible in the valley?! :~)

Howsabout this - Looking carefully, with the aid of a small mirror and a
decent light source?
Not wanting to sound pedantic, but what did you expect? You need to look and
see where it's coming from.
Badger.

Exactly, so your previous message wasn't really not much help, it
doesn't *mean* the pump gland seals are about to fail, it just means
that the engine *probably* [1] has a coolant leak. Either away any
suspected water leak on either the Stag (or 1850 based [1]) engines
need investigating PDQ.

[1] basically half a Stag engine - although not quite as 'fragile' as
it's big brother.

No, Jerry, read it again. IF the leak is from the tell-tale hole at the
pump, then it's a safe assumption that the pump needs attention, wouldn't
you say? Now, if you want to continue being pedantic when someone is trying
to offer genuine help based on personal experience, may I suggest you go
troll another newsgroup? Do you or have you ever actually owned a stag? No,
I didn't think so!
Oh, and don't bother going back to uk.rec.models.rail as everyone there has
plonked you!

So you did not write the following then?

<quote>
Don't confuse this with leaking inlet manifold gaskets which also
cause coolant to be visible in the valley though.

alt.troll is that way ====>>>

:Jerry: wrote:


The best way to look for leaks is to have coolant in the motor which is
coloured. Coolant is thinner than water and leaks show better and
distinguish from wet weather water.

Also keep an eye on the temperature gauge for variations.

:Jerry: wrote:


Coolant, which should be in the engine, is coloured.

Err, yes, but how does that help the owner know were it's leaking
from?! :~)

FFS, you moron, BY LOOKING!

NOW GO TROLL SOMEWHERE ELSE!

We know that one needs to look but *where* and how, obviously not
simply looking for water in the 'valley', as the water could be from
more than one place [1].

Might I suggest that if one suspects a water leak the best course of
action is to carry out a (controlled) pressure test on the coolant
system, after any suspect areas have been dried of water - using
compressed air in hard to reach areas - doing this one should be able
to see the coolant *actually* escaping.

[1] the same is true for most V engines even where the water pump is
conventionally placed

Indeed. On my Rover V8 EFI there are a number of ways water can end up in
the valley and it's very difficult to tell where it's coming from. I
suspected the worst with a recent case on mine but it turned out to be
leaking round the threads of the temp sensor. Phew.

--
*To be intoxicated is to feel sophisticated, but not be able to say it.

    Dave Plowman        dave@davenoise.co.uk           London SW
                  To e-mail, change noise into sound.

:Jerry: wrote:

Its is visible.

That's like saying, because there is a puddle of water, it must have
rained...