i have done a further modification here. per this picture

i have removed the tube in the red circles. this tube is part of the warm positive crankase ventilation valve circuit. it connects to the back of the intake manifold just below the spark plug connections.

per my earlier posts here, i am wondering, removing this tube, putting a vacuum cap at this side between the two red caps, and putting a cap on the end of the valve switch at the back, would that cause any problems????

i am even considering unplugging the valve switch back there. per my wire diagram it seems entirely for the heater. the heater part is already removed, which was connected where the two red caps are.

 

If thats the vacuum hose for PCV Valve then yes it would cause issues if removed
You would end up with blow-by pressure and oil vapor blowing out valve cover gaskets and oil pan gaskets

PCV system is there to reduce pressure from blow-by in crank case, so crank case/valve cover areas have a slight negative pressure

 

Okay ron. well i did remove the hose. plugged the end between the two red caps with a vacuum cap. the other end has a sort of filter on it. it still has the valve power connector connected, but not fully closed.

is that connector really needed, since its for the 'heater' which isnt being used now?

AND, per that hose, which direction does the vacuum air move? does it come through the valve area by the firewall, or the side there by the heater hoses?

 

@ibmp200
Late to this conversation. You've got a 2007 V6~4.0L~SOHC.
Your messing with what I call the "PCV Coolant Loop", it's a smaller 5/16" Coolant Loop
that flows parallel with the larger 5/8" Coolant Loop for the HeaterCore,
& comes ON only with the HeaterValve when driver calls for CabHeat (stupid logic).
In my 2001 V6~4.0L~SOHC, this 5/16" loop ran
from the 5/8"~5/16"~5/8" SteelTee assembly bolted to the right side of the engine,
thru the PCVHeatExchanger on the rightside of the IntakeManifoldThroat (your red circles & red cap\covers),
thru an "OxBow" around the neck of the PCVValve on the rear of the left ValveCover,
then to a 5/8"~5/16"~5/8" PlasticTee asseembly (notorious leaker) on the FireWall HeaterCore connection.
Sometime between 2001 & 2007, the PCVValve was redesigned with an ElectricHeatElement instead of a CoolantOxbow
so that part of the 5/16" Coolant side loop went away.
I deleted the 5/16" Coolant Loop on my 2001 a couple of years ago,
living at 9000ft & 5months of winter down to -20f, without ill effect; though vehicle is pampered in a garage at night.
The two 5/16"HoseBarbs on PCVHeatExchanger were ground off & filled with JBWeld.
The two Tee assemblies noted above, were deleted.

The larger vacuum tube\hose assembly, from the "PitchFork" PCVHeatExchanger on the rightside IntakeManifoldThroat
to the PCVValve on the rear of the left ValveCover, is REQUIRED & should not be deleted or capped.
You already have oil leaks around the ValveCovers; if you disable\cap the PCVValve or VacLine,
your engine will likely run rough, develop more oil leaks, & NOT comply with emissions.
Just either clean or replace the PCVValve every couple of years to keep it working.

You've likely got a PCVValve with ElecticHeat like this one.

How I modified the PCVHeatExchanger.

 

well dillard, i do have the electric valve you included picture of. its more or less a pintle, that is opened or closed depending on what the computer thinks is necessary per occurrance of blow by. i live in northwest oregon, and am never subject to freezing tempreatures.

before this recent modification, i had since cut off the two things the red caps are on, making it very much like your j b weld modification. and did away with the heater core loop. the other hose, that usually connects to the larger piece between the two red caps; wrapping around to the back of the manifold, i removed that hose altogether. putting a vacuum cap on the main part that is between the two red caps. and the other end, that connects to the 'electric' valve; i am in the process of putting an 'air filter' at the end of that valve. the end opposite the blue ring seal in your picture.

for the time being tho, i have attached a very short and tapered to a point, rubber hose in that place. it tapers to about an eighth inch opening. which, i guess in effect, goes back to what vehicles used to do before such crankcase ventilation. --just letting the stuff go to atmosphere.

i did some modifications to the fuel vapor lines, and added a sort of filter at the top of the fuel tank. just needa go back to auto zone and get a similar attachment for the end of that valve. :) --these vapor line modifications positively affected my miles per gallon. those vapor lines may be saving the environment, but they utilize more gasoline than without.

 

Alternative facts?
Best i not comment further on this thread.
Good luck with your mods.

 

What are you referring to with the response of "Alternative facts"??? i didnt write that. what do you mean?

 

here is my finished modification to the positive crankcase ventilation line between the intake manifold and the left side valve cover

the first picture has a vacuum cap in the intake manifold and the metal bar is attached to prevent it from coming loose per vacuum.


and at the back side, there is a fuel filter at the end of the valve.



in full, no blow by gases are 'redirected' into the intake manifold. simply sent out through the filter. all this has ben installed a few days and no operation issues yet.

 

Nice! I've been wondering about this when I took my intake manifold off the other day. I'm glad to see this can be deleted to reduce the spaghetti of hoses under my hood. I live in CA where it never gets below freezing.

 

I'd think the fuel filter (2nd photo in post #33) will become a gunky mess in short order.

Blowing crankcase vapor into the atmosphere is so 1940"s.

Isn't this "odd mod" a 50 state violation? What did you get out of it?

 

Samoflan,

When you do it its better if you leave the part installed appearing at third picture in post 29 and putting a vacuum cap on that nipple

 

Georgeandkira

If it becomes a mess its an easy cheap replacement 😆

I personally dont care bout any violations. The system is closed and has the filter. Any pollution will be very minimal

My benefit is a slightly neater engine bay.

too much cookie cut crap in vehicle engine bays🙄🙄😆😆😆