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From: Built_Well on 12 Jul 2008 23:09

There's no mention in the Camry's owner's manual or
scheduled maintenance guide about PCV valve replacement.

Wikipedia says, "Typical maintenance schedules for gasoline
engines include PCV valve replacement whenever spark plugs
are replaced."

The '06 Camry Maintenance Guide mentions to replace spark
plugs at 120,000 miles or 12 years, and to inspect the
engine valve clearances at that time, but no mention at
all is made of the important PCV system that recirculates
blow-by fuel and water vapor from the crankcase to the
intake manifold en route to the combustion chamber
for re-burning.

By the way, iridium spark plugs lasting 12 years is great.
I remember my old Dodge Colt needed new plugs every couple
years or so. I guess that's one of the advantages of having
iridium and also having a Direct Ignition or Distributor-less
Ignition system. I'm getting into this car talk.

Not sure I'll be able to resist changing the spark plugs
for 12 whole years, though. Maybe 8 or 10.
From: Jeff Strickland on 12 Jul 2008 23:22
Is it possible that the PCV is not a V at all, but a simple orifice?

Back in the olden days, the PCV held a ball on the inside and a calibrated
spring. These days, the PCV is just an orifice and does not have a
maintenance schedule.





"Built_Well" <Built_Well_Toyota(a)hotmail.com> wrote in message
news:577a8e49-d15b-4826-a077-74e6e4fe0730(a)8g2000hse.googlegroups.com...
>
> There's no mention in the Camry's owner's manual or
> scheduled maintenance guide about PCV valve replacement.
>
> Wikipedia says, "Typical maintenance schedules for gasoline
> engines include PCV valve replacement whenever spark plugs
> are replaced."
>
> The '06 Camry Maintenance Guide mentions to replace spark
> plugs at 120,000 miles or 12 years, and to inspect the
> engine valve clearances at that time, but no mention at
> all is made of the important PCV system that recirculates
> blow-by fuel and water vapor from the crankcase to the
> intake manifold en route to the combustion chamber
> for re-burning.
>
> By the way, iridium spark plugs lasting 12 years is great.
> I remember my old Dodge Colt needed new plugs every couple
> years or so. I guess that's one of the advantages of having
> iridium and also having a Direct Ignition or Distributor-less
> Ignition system. I'm getting into this car talk.
>
> Not sure I'll be able to resist changing the spark plugs
> for 12 whole years, though. Maybe 8 or 10.

From: Ray O on 12 Jul 2008 23:39

"Jeff Strickland" <crwlr(a)verizon.net> wrote in message
news:g5bsek$qi8$1(a)registered.motzarella.org...
> Is it possible that the PCV is not a V at all, but a simple orifice?
>
> Back in the olden days, the PCV held a ball on the inside and a calibrated
> spring. These days, the PCV is just an orifice and does not have a
> maintenance schedule.
>

PCV = positive crankcase ventilation so there is a "V" in a PCV system.

Yes, it is possible that there is no valve in the positive crankcase
ventilation system, not sure if the 2006 Camry has a valve or not.

There are two easy ways to check - follow the crankcase ventilation tube
from the throttle body to the engine and look for a PCV valve, or look in
the factory service manual.
--

Ray O
(correct punctuation to reply)


From: johngdole on 13 Jul 2008 00:29
Do it every 30K miles, along with the PCV grommet. Many cars only call
for "inspections." These valves can still click but do not work as
well as new valves.

Now the crank is open to the intake hose through the vent hose, but
how some of these still can get over pressurized is beyond me.



On Jul 12, 8:09 pm, Built_Well <Built_Well_Toy...(a)hotmail.com> wrote:
> There's no mention in the Camry's owner's manual or
> scheduled maintenance guide about PCV valve replacement.
>
> Wikipedia says, "Typical maintenance schedules for gasoline
> engines include PCV valve replacement whenever spark plugs
> are replaced."
>
> The '06 Camry Maintenance Guide mentions to replace spark
> plugs at 120,000 miles or 12 years, and to inspect the
> engine valve clearances at that time, but no mention at
> all is made of the important PCV system that recirculates
> blow-by fuel and water vapor from the crankcase to the
> intake manifold en route to the combustion chamber
> for re-burning.
>
> By the way, iridium spark plugs lasting 12 years is great.
> I remember my old Dodge Colt needed new plugs every couple
> years or so.  I guess that's one of the advantages of having
> iridium and also having a Direct Ignition or Distributor-less
> Ignition system. I'm getting into this car talk.
>
> Not sure I'll be able to resist changing the spark plugs
> for 12 whole years, though.  Maybe 8 or 10.

From: Built_Well on 13 Jul 2008 00:48
Ray O wrote:
> "Jeff Strickland" <crwlr(a)verizon.net> wrote
>
> > Is it possible that the PCV is not a V at all, but a simple orifice?
> >
> > Back in the olden days, the PCV held a ball on the inside and a calibrated
> > spring. These days, the PCV is just an orifice and does not have a
> > maintenance schedule.
> > ================
>
> PCV = positive crankcase ventilation so there is a "V" in a PCV system.
>
> Yes, it is possible that there is no valve in the positive crankcase
> ventilation system, not sure if the 2006 Camry has a valve or not.
>
> There are two easy ways to check - follow the crankcase ventilation tube
> from the throttle body to the engine and look for a PCV valve, or look in
> the factory service manual.
> --
>
> Ray O
> (correct punctuation to reply)
> ===========================

Jeff, you're a very smart man who knows a lot about cars, but it
looks to me like the '06 Camry's PCV valve does have a moving part
inside (a valve), so it's not just an orifice in this model :-)

Judging from a diagram in the Emissions section of the Camry
service and repair manual I downloaded from CamryStuff.com , the
moving part looks more like a cone than a ball. But I know
there are both types. The diagram is on Page 1,500.

For other beginners like myself, since the PCV valve is not
the empty type, it's possible it may wear out over enough
time, and it might be a good idea to change it with the
spark plugs every 12 years, or 8 to 10 years if you
wanna jump the gun a little bit like me.
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