checking air filters

[davidkerryedwards]

How do people test their air filters? My European Mercedes motorhome had a
nifty feature.
It had a vacuum operated piston in the intake. When the air filter go dirty and
vacuum
increased in the intake, it would suck the piston down and it would show red in
a little
window. I see my intake, pre-turbo has a schrader valve (inoperable) in it
which I assume is
for testing with a vacuum gauge. Do other people have that? If not, what are
the options?
With filters at $80 it's nice to have a test before replacing.

Kerry
82 FC 35
Denver

[Bob & Carol Howald`]

Dave That's oem on my 93pt also oem on my Dodge diesel truck. Bob
93pt-40



In WanderlodgeForum@yahoogroups.com, "davidkerryedwards"
wrote:
>
> How do people test their air filters? My European Mercedes
motorhome had a nifty feature.
> It had a vacuum operated piston in the intake. When the air filter
go dirty and vacuum
> increased in the intake, it would suck the piston down and it would
show red in a little
> window. I see my intake, pre-turbo has a schrader valve
(inoperable) in it which I assume is
> for testing with a vacuum gauge. Do other people have that? If
not, what are the options?
> With filters at $80 it's nice to have a test before replacing.
>
> Kerry
> 82 FC 35
> Denver
>

[davidkerryedwards]

Ok, I found one. I'll probably get it and install it in the intake.

http://www.knfilters.com/search/product....od=85-2444

Kerry
82 Fc 35
Denver

--- In WanderlodgeForum@yahoogroups.com, "Bob & Carol Howald`"
wrote:
>
> Dave That's oem on my 93pt also oem on my Dodge diesel truck. Bob
> 93pt-40
>
>
>
> In WanderlodgeForum@yahoogroups.com, "davidkerryedwards"
> wrote:
> >
> > How do people test their air filters? My European Mercedes
> motorhome had a nifty feature.
> > It had a vacuum operated piston in the intake. When the air filter
> go dirty and vacuum
> > increased in the intake, it would suck the piston down and it would
> show red in a little
> > window. I see my intake, pre-turbo has a schrader valve
> (inoperable) in it which I assume is
> > for testing with a vacuum gauge. Do other people have that? If
> not, what are the options?
> > With filters at $80 it's nice to have a test before replacing.
> >
> > Kerry
> > 82 FC 35
> > Denver
> >
>

[davidkerryedwards]

Picked up my air filter indicator yesterday. Overpriced at $38 but still a good
way to keep
track of the condition of the filter. It goes in the intake between the filter
and turbo or
filter and engine intake. It's basically a vacuum guage that shows highest
vacuum pulled.
It should help avoid the problem Julia had with a plugged filter. It comes in
two versions.
On is threaded and the other fits into a grommet that itself fits into an 11/16
hole drilled
in the intake.

Kerry
82 Fc 35
Denver

--- In WanderlodgeForum@yahoogroups.com, "davidkerryedwards"
wrote:
>
> Ok, I found one. I'll probably get it and install it in the intake.
>
> http://www.knfilters.com/search/product....od=85-2444
>
> Kerry
> 82 Fc 35
> Denver
>