Trivia Q: What's the REAL reason for the weep hole on water pump snouts?

Hint - it has nothing to do with water leaking.

Ashton Crusher > wrote in
:

> Hint - it has nothing to do with water leaking.
>


I was told it was to protect the bearing from coolant ingress.

My Honda's factory shop manual tells me weepage from that hole is normal.


--
Tegger

Ashton Crusher wrote:
> Hint - it has nothing to do with water leaking.

Two things.
One it allows atmospheric pressure in to allow the seals to remain
seated. If the hole was missing, as the bearings and housing heat up the
air pressure behind the seal would increase and damage the seal.

Second is that it also does allow you to check the status of the seal by
checking for leakage.


--
Steve W.

"Steve W." > wrote in news:hj7grq$qlf$1
@speranza.aioe.org:

> Ashton Crusher wrote:
>> Hint - it has nothing to do with water leaking.
>
> Two things.
> One it allows atmospheric pressure in to allow the seals to remain
> seated. If the hole was missing, as the bearings and housing heat up the
> air pressure behind the seal would increase and damage the seal.
>
> Second is that it also does allow you to check the status of the seal by
> checking for leakage.
>
>



Quoting from several Honda factory manuals I have:
"NOTE: Small amount of "weeping" from the bleed hole is normal."

Quoting from a Toyota factory manual:
"Visually check the water hole for coolant leakage. If leakage is found,
replace the water pump."

I'm confused.


--
Tegger

On Jan 20, 1:57*am, Tegger > wrote:
> Ashton Crusher > wrote :
>
> > Hint - it has nothing to do with water leaking.
>
> I was told it was to protect the bearing from coolant ingress.
>
> My Honda's factory shop manual tells me weepage from that hole is normal.
>
> --
> Tegger

WTF? Every manual I've ever read (NB: I've never owned a Honda, nor
in fact any Japanese car) says that coolant weeping out of the hole is
a sign that you should schedule an appointment with your helping
friendly mechanic.

nate

That Honda factory manual is Right.
Some houses and buildings have weep holes too, but that is a whole
nother story.
cuhulin

> Some houses and buildings have weep holes too,


I was considering trying an ex-wife joke ......

N8N > wrote in
:

> On Jan 20, 1:57*am, Tegger > wrote:

>>
>> My Honda's factory shop manual tells me weepage from that hole is
>> normal.
>>
>> --
>> Tegger
>
> WTF? Every manual I've ever read (NB: I've never owned a Honda, nor
> in fact any Japanese car) says that coolant weeping out of the hole is
> a sign that you should schedule an appointment with your helping
> friendly mechanic.
>


My eyes ain't lyin', I can tell you that. It says "seepage is normal",
plain as day, in all six Honda shop manuals I checked.


--
Tegger

On Tue, 19 Jan 2010 21:46:24 -0700, Ashton Crusher wrote:

> Hint - it has nothing to do with water leaking.

I would guess it has something to do with pressure buiding up in the pump...

On Tue, 19 Jan 2010 21:46:24 -0700, Ashton Crusher >
wrote:

>Hint - it has nothing to do with water leaking.


A couple of you are pretty close. The reason for the "weep hole" is
that without it, it would not be possible to press the bearing into
place due to trapped air. I think I saw this on a water pump
manufacturers web page at one time.