I've asked on uk.rec.cars.maintenance without much success so fall back to
the experts.;-)

I've got a problem on the old Rover with the one way valve in the petrol
pump failing. It's a fuel injected car so has a high pressure pump mounted
underneath and close to the tank. There is a filter after the pump and a
gauze one inside the tank which I'm told often fails by falling off. ;-)
So what I need is a 1/2" fitting in line filter to go in the rubber hose
between the tank and pump - there's plenty of room for near any size and
shape within the transmission tunnel behind the pump.

I can get one from a specialist racing shop no problem - apart from the
cost of anything up to 100 quid, whereas the normal disposable inline 3/8"
type for the high pressure side only cost a few pounds.
So can anyone think of a suitable lower cost one? It doesn't have to be a
fine particle filter - the original only being a gauze type. And of course
suitable for low pressure only. Perhaps something for a tractor? ;-)

--
*Could it be that "I do " is the longest sentence? *

Dave Plowman London SW
To e-mail, change noise into sound.

On 25 Jul, 08:29, "Dave Plowman (News)" wrote:
I've asked on uk.rec.cars.maintenance without much success so fall back to
the experts.;-)

I've got a problem on the old Rover with the one way valve in the petrol
pump failing. It's a fuel injected car so has a high pressure pump mounted
underneath and close to the tank. There is a filter after the pump and a
gauze one inside the tank which I'm told often fails by falling off. ;-)
So what I need is a 1/2" fitting in line filter to go in the rubber hose
between the tank and pump - there's plenty of room for near any size and
shape within the transmission tunnel behind the pump.

I can get one from a specialist racing shop no problem - apart from the
cost of anything up to 100 quid, whereas the normal disposable inline 3/8"
type for the high pressure side only cost a few pounds.
So can anyone think of a suitable lower cost one? It doesn't have to be a
fine particle filter - the original only being a gauze type. And of course
suitable for low pressure only. Perhaps something for a tractor? ;-)

--
*Could it be that "I do " is the longest sentence? *

Dave Plowman London SW
To e-mail, change noise into sound.

What about using one of those disposable inline filters they use on
the high pressure side, together with something to make it fit the
1/2" tubing? Or am I missing somethng? Alternatively, I wonder if
the filters they fit on heating oil supplys would be suitable, or are
they just water traps?

In article om,
wrote:
What about using one of those disposable inline filters they use on
the high pressure side, together with something to make it fit the
1/2" tubing?

I'm concerned it may restrict the flow since that is only gravity to the
pump. The feed is 1/2" but with the more usual 3/8" output. And you
*really* don't want constant cavitation with a high pressure petrol pump.

Or am I missing somethng? Alternatively, I wonder if
the filters they fit on heating oil supplys would be suitable, or are
they just water traps?

Dunno - that's why I'm asking.

--
*If you don't like the news, go out and make some.

Dave Plowman London SW
To e-mail, change noise into sound.

"Dave Plowman (News)" wrote in message
...
I've asked on uk.rec.cars.maintenance without much success so fall back to
the experts.;-)

I've got a problem on the old Rover with the one way valve in the petrol
pump failing. It's a fuel injected car so has a high pressure pump mounted
underneath and close to the tank. There is a filter after the pump and a
gauze one inside the tank which I'm told often fails by falling off. ;-)
So what I need is a 1/2" fitting in line filter to go in the rubber hose
between the tank and pump - there's plenty of room for near any size and
shape within the transmission tunnel behind the pump.

I'd question the wisdom of fitting a filter in the location you suggest. At
the most you don't want any more than a strainer because positive
displacement roller cell (is this correct?) pumps don't like to suck, and
given the low vapour pressure of modern fuel it will cavitate and make
noise.

But, many manufacturers don't even bother with even a strainer between tank
and pump, so why fit one? I suspect you suspect that there's crap in the
tank? IMHO you should remove the tank and clean it out and forget about
fitting strainers.

Julian

In article , Julian
wrote:

"Dave Plowman (News)" wrote in message
...
I've asked on uk.rec.cars.maintenance without much success so fall
back to the experts.;-)

I've got a problem on the old Rover with the one way valve in the
petrol pump failing. It's a fuel injected car so has a high pressure
pump mounted underneath and close to the tank. There is a filter after
the pump and a gauze one inside the tank which I'm told often fails by
falling off. ;-) So what I need is a 1/2" fitting in line filter to go
in the rubber hose between the tank and pump - there's plenty of room
for near any size and shape within the transmission tunnel behind the
pump.

I'd question the wisdom of fitting a filter in the location you suggest.
At the most you don't want any more than a strainer because positive
displacement roller cell (is this correct?) pumps don't like to suck,
and given the low vapour pressure of modern fuel it will cavitate and
make noise.

Indeed - hence my mention of a low pressure one.

But, many manufacturers don't even bother with even a strainer between
tank and pump, so why fit one? I suspect you suspect that there's crap
in the tank? IMHO you should remove the tank and clean it out and
forget about fitting strainers.

I think you'll find all tanks have a gauze filter internally. And I've
read reports that most pump failures are due to dirt entering them. My
tank did have a gauze filter but it's broken off - hence the desire to
replace it with something similar externally. Specialist ones specifically
for this are available but expensive.

Julian

--
*The hardness of the butter is proportional to the softness of the bread *

Dave Plowman London SW
To e-mail, change noise into sound.

"Dave Plowman (News)" wrote in message
...
In article , Julian
wrote:

"Dave Plowman (News)" wrote in message
...
I've asked on uk.rec.cars.maintenance without much success so fall
back to the experts.;-)

I've got a problem on the old Rover with the one way valve in the
petrol pump failing. It's a fuel injected car so has a high pressure
pump mounted underneath and close to the tank. There is a filter after
the pump and a gauze one inside the tank which I'm told often fails by
falling off. ;-) So what I need is a 1/2" fitting in line filter to go
in the rubber hose between the tank and pump - there's plenty of room
for near any size and shape within the transmission tunnel behind the
pump.

I'd question the wisdom of fitting a filter in the location you suggest.
At the most you don't want any more than a strainer because positive
displacement roller cell (is this correct?) pumps don't like to suck,
and given the low vapour pressure of modern fuel it will cavitate and
make noise.

Indeed - hence my mention of a low pressure one.

I don't think you understand the problem. The question is one of pressure
drop or delta P. It has nothing to do with the mechanical strength of the
filter - ie 'a low pressure one.' Any filter (unless it's the size of a
dustbin for your application) will cause too much restriction or pressure
drop. You can get away with a gauze or strainer but that's your lot.



But, many manufacturers don't even bother with even a strainer between
tank and pump, so why fit one? I suspect you suspect that there's crap
in the tank? IMHO you should remove the tank and clean it out and
forget about fitting strainers.

I think you'll find all tanks have a gauze filter internally.

No, (for instance) Audi deleted the tank strainer 1/2 way through one model
production - car equipped with K-jet and L-jet. No problems result
whatsoever.

And I've
read reports that most pump failures are due to dirt entering them.

Odd reports! Most expire through normal wear and tear. They slowly become
noisy and pump current consumption increases.


My
tank did have a gauze filter but it's broken off - hence the desire to
replace it with something similar externally. Specialist ones specifically
for this are available but expensive.

Do as you wish, but you're barking up the wrong tree.

Julian.

In article ,
Julian wrote:
Indeed - hence my mention of a low pressure one.

I don't think you understand the problem. The question is one of
pressure drop or delta P.

Hence the need for a low pressure one. Carb cars run at a pressure of only
a few PSI so must have a non restrictive filter - compared to injection
types.

It has nothing to do with the mechanical
strength of the filter - ie 'a low pressure one.'

Did I say it did?

Any filter (unless
it's the size of a dustbin for your application) will cause too much
restriction or pressure drop. You can get away with a gauze or strainer
but that's your lot.

Which is a filter.


But, many manufacturers don't even bother with even a strainer
between tank and pump, so why fit one? I suspect you suspect that
there's crap in the tank? IMHO you should remove the tank and clean
it out and forget about fitting strainers.

I think you'll find all tanks have a gauze filter internally.

No, (for instance) Audi deleted the tank strainer 1/2 way through one
model production - car equipped with K-jet and L-jet. No problems
result whatsoever.

Fine if that's your experience.

And I've read reports that most pump failures are due to dirt
entering them.

Odd reports! Most expire through normal wear and tear. They slowly
become noisy and pump current consumption increases.

On mine the one way valve has failed. Likely caused by dirt, I'm told. And
it so happens to have coincided with the internal filter braking off. So
I'm not keen on the same happening to the expensive replacement I have
waiting to fit.


My tank did have a gauze filter but it's broken off - hence the desire
to replace it with something similar externally. Specialist ones
specifically for this are available but expensive.

Do as you wish, but you're barking up the wrong tree.

I don't think I am.

--
*Caution: I drive like you do.

Dave Plowman London SW
To e-mail, change noise into sound.

"Dave Plowman (News)" wrote in message
...
In article ,
Julian wrote:
Indeed - hence my mention of a low pressure one.

I don't think you understand the problem. The question is one of
pressure drop or delta P.

Hence the need for a low pressure one. Carb cars run at a pressure of only
a few PSI so must have a non restrictive filter - compared to injection
types.

As a rule (if fitted, and not just a gauze on the carb inlet or fuel pum)
they'll be a small paper affair and fitted after a pump. Totally unsuited
for a 'suck' through application for reasons I gave earlier on. Please try
it though - I'll be interested in your follow up report!



It has nothing to do with the mechanical
strength of the filter - ie 'a low pressure one.'

Did I say it did?

It's what you _didn't_ say. Low pressure or high pressure - neither give an
indication of pressure differential versus flow or the level of filtration.



Any filter (unless
it's the size of a dustbin for your application) will cause too much
restriction or pressure drop. You can get away with a gauze or strainer
but that's your lot.

Which is a filter.

Don't be so bloody argumentative, do drew a distinction between gauze and
filter yourself in your opening post. Do you want a constructive dialogue or
the normal ****wit style newsgroup argument that you seem to enjoy with
Doctor D?




But, many manufacturers don't even bother with even a strainer
between tank and pump, so why fit one? I suspect you suspect that
there's crap in the tank? IMHO you should remove the tank and clean
it out and forget about fitting strainers.

I think you'll find all tanks have a gauze filter internally.

No, (for instance) Audi deleted the tank strainer 1/2 way through one
model production - car equipped with K-jet and L-jet. No problems
result whatsoever.

Fine if that's your experience.

And I've read reports that most pump failures are due to dirt
entering them.

Odd reports! Most expire through normal wear and tear. They slowly
become noisy and pump current consumption increases.

And
it so happens to have coincided with the internal filter braking off.

Have you determined that this is the case? - You only seem to suspect this
in your opening comments. What are the facts?

Julian.

In article , Dave Plowman (News)
writes

On mine the one way valve has failed. Likely caused by dirt, I'm told. And
it so happens to have coincided with the internal filter braking off. So
I'm not keen on the same happening to the expensive replacement I have
waiting to fit.

Totally agree with your logic, no knowing what crud is in an old tank or
may fall in later.

Would a Y-strainer suit you? I thought of the CH ones that BES do but
who knows if the sealing O-ring would be fuel friendly. Here's one that is
fuel rated and only a fiver but it's 1" BSP, second item down:
http://www.fuelproof.co.uk/filters/index.htm
Hopefully some kind of fuel hose adaptor could be found or fabricated.
--
fred
Plusnet - I hope you like vanilla

Dave Plowman (News) wrote in message
...
I've asked on uk.rec.cars.maintenance without much success so fall back to
the experts.;-)

I've got a problem on the old Rover with the one way valve in the petrol
pump failing. It's a fuel injected car so has a high pressure pump mounted
underneath and close to the tank. There is a filter after the pump and a
gauze one inside the tank which I'm told often fails by falling off. ;-)
So what I need is a 1/2" fitting in line filter to go in the rubber hose
between the tank and pump - there's plenty of room for near any size and
shape within the transmission tunnel behind the pump.

I can get one from a specialist racing shop no problem - apart from the
cost of anything up to 100 quid, whereas the normal disposable inline 3/8"
type for the high pressure side only cost a few pounds.
So can anyone think of a suitable lower cost one? It doesn't have to be a
fine particle filter - the original only being a gauze type. And of course
suitable for low pressure only. Perhaps something for a tractor? ;-)


Tractors are mostly diesel with typically cav296 filters, old petrol
tractors used AC glass bowl type filters which are still available from
Demon Tweeks.

Halfords do a range of external metal canister filters for modern injection
cars, you would need to apply some diy to convert the ends to 1/2.




-

On Jul 25, 5:29 am, "Dave Plowman (News)"
wrote:
I've asked on uk.rec.cars.maintenance without much success so fall back to
the experts.;-)

I've got a problem on the old Rover with the one way valve in the petrol
pump failing. It's a fuel injected car so has a high pressure pump mounted
underneath and close to the tank. There is a filter after the pump and a
gauze one inside the tank which I'm told often fails by falling off. ;-)
So what I need is a 1/2" fitting in line filter to go in the rubber hose
between the tank and pump - there's plenty of room for near any size and
shape within the transmission tunnel behind the pump.

I can get one from a specialist racing shop no problem - apart from the
cost of anything up to 100 quid, whereas the normal disposable inline 3/8"
type for the high pressure side only cost a few pounds.
So can anyone think of a suitable lower cost one? It doesn't have to be a
fine particle filter - the original only being a gauze type. And of course
suitable for low pressure only. Perhaps something for a tractor? ;-)

--
*Could it be that "I do " is the longest sentence? *

Dave Plowman London SW
To e-mail, change noise into sound.

Something like this?????????
NEW EARLS IN-LINE FUEL FILTER Part# 230206 -6AN
on eBay!

In article . com,
terry wrote:
Something like this?????????
NEW EARLS IN-LINE FUEL FILTER Part# 230206 -6AN
on eBay!

Can't seem to find it even on a worldwide Ebay search. The actual Ebay
listing number usually finds these things, though.

--
*I see you've set aside this special time to humiliate yourself in public

Dave Plowman London SW
To e-mail, change noise into sound.