850 windshield washer check valve cleaning

[Ted]

I noticed that fluid was squirting out the check valve hole.
I took it apart and it was all gunked up. It is all clean, but
something doesn't look right... the black valve/stopper has
a pin sized hole in the center of it, which looks original, but
doesn't make sense to me. That would seem to allow air
into both the squirter lines AND the supply line, not to
mention fluid to squirt straight out the hole in the red cap.
Is a hole in the black thingy normal, or has it developed?

 

[Mike F]

I noticed that fluid was squirting out the check valve hole.
I took it apart and it was all gunked up. It is all clean, but
something doesn't look right... the black valve/stopper has
a pin sized hole in the center of it, which looks original, but
doesn't make sense to me. That would seem to allow air
into both the squirter lines AND the supply line, not to
mention fluid to squirt straight out the hole in the red cap.
Is a hole in the black thingy normal, or has it developed?

There's a diaphragm held against the pipes with a small spring to stop
any fluid from leaking out that hole. If yours is bad, you'll need a
new check valve.

--
Mike F.
Thornhill (near Toronto), Ont.

NOTE: new address!!
Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)

 

[Ted]

Ted wrote:

[] something doesn't look right... the black valve/stopper has
a pin sized hole in the center of it, which looks original, but
doesn't make sense to me. That would seem to allow air
into both the squirter lines AND the supply line, not to
mention fluid to squirt straight out the hole in the red cap.
Is a hole in the black thingy normal, or has it developed?

There's a diaphragm held against the pipes with a small spring to stop
any fluid from leaking out that hole. If yours is bad, you'll need a
new check valve.

Unless the design has changed, what you are calling a diaghragm
I was calling a valve/stopper. I realize this was an obscure question.
Who has a check valve sitting next to their computer... who
remembers what the black diaphragm/stopper/whatever looks
like. I think the hole in mine shouldn't be there, it is just weird
that it is there. I doubt someone stuck a pin in there, and I doubt
the supply line pressure could have bored a hole in it. Gremlins
perhaps?

 

[Mike F]

Ted wrote:

[] something doesn't look right... the black valve/stopper has
a pin sized hole in the center of it, which looks original, but
doesn't make sense to me. That would seem to allow air
into both the squirter lines AND the supply line, not to
mention fluid to squirt straight out the hole in the red cap.
Is a hole in the black thingy normal, or has it developed?

There's a diaphragm held against the pipes with a small spring to stop
any fluid from leaking out that hole. If yours is bad, you'll need a
new check valve.

Unless the design has changed, what you are calling a diaghragm
I was calling a valve/stopper. I realize this was an obscure question.
Who has a check valve sitting next to their computer... who
remembers what the black diaphragm/stopper/whatever looks
like. I think the hole in mine shouldn't be there, it is just weird
that it is there. I doubt someone stuck a pin in there, and I doubt
the supply line pressure could have bored a hole in it. Gremlins
perhaps?

I call the whole thing a valve, and what you call a valve/stopper I call
a diaphragm. In any case the latter shouldn't have a hole in it.

--
Mike F.
Thornhill (near Toronto), Ont.

NOTE: new address!!
Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)