Thread: 4BD1 Provent Install

Originally Posted by HotWired

Where is everyone connecting the filtered air outlet back onto the engine? Is it just that small tube on the intake pipe?

At the moment I am just running an open vent system. You can plumb it back into the engine intake anywhere pre-turbo. the OEM breather connection is both too small and on the wrong side of the turbo (after turbo fitment).

the connection should be 1"

My setup is:
- Provent located at front of LH wing just behind the top radiator bracket
- Provent inlet connected to NA tappet cover
- NA rocker cover hose tee'd into the Provent inlet hose (near the tappet cover)
- Return air from Provent connected into the inlet between air filter and turbo
- Oil return is plumbed into the tappet cover via non-return valve - but I'd prefer it went straight down into the sump as the plumbing would be nicer.

25K km's so far with no issues.

Edit: BTW - is there a recommended clean/change period for the element?

Steve

Originally Posted by steveG

...

Edit: BTW - is there a recommended clean/change period for the element?

...

Unlike dust/air filters, more frequent cleaning/changing is better. However you could wait until the pressure drop gets to 50 mBar and the valve in the cap pops open... (you will notice this by oil running down the side of the PV housing).

The filter should be good for ~5000 hrs.

If you want to run it plumbed back into the intake, then I'd recommend the anti-siphon valve is installed in the drain.

Correct me if I'm wrong.

The big vent down low on the left side of the engine connects to the Provent, and the Provent connects somewhere between the air cleaner and turbo.

Where does the little tube on the bottom of the Provent go?

Can the upper vent tube coming out of the rocker cover on the engines right side also be connected to the Provent?

Glenn

Engine breather/breathers, connect to inlet of provent.

Provent separates oil mist from air, and gravity takes oil to the bottom outlet, while air exits the upper outlet.

The separated oil can be returned to the sump, either directly, or captured in a container for later return to sump.

The air can be vented to atmosphere (not environmentally kosher) or to the engine inlet, before turbo.

Apparently when environmental rules mandated the engine breather vent to the engine intake, the turbo life of long haul trucks was being affected by fine oil particles in the air impacting the compressor impeller, thus the provent was developed.

We don't use our vehicles enough to have that turbo problem. The provent won't make your engine perform any better or be more reliable. It may however help the environment.

Corrections added for the PV200.

Originally Posted by Bush65

Engine breather/breathers, connect to inlet of provent (THE UPPER OF THE TWO 1" CONNECTIONS).

Provent separates oil mist from air, and gravity takes oil to the bottom outlet (0.5"), while air exits the LOWER 1" outlet.

The separated oil can be returned to the sump, either directly, or captured in a container for later return to sump. NOTE that this oil will be less viscous and have less soot than the oil in the sump - so better to have it in the engine.

The air can be vented to atmosphere (not environmentally kosher) or to the engine inlet, before turbo.

Apparently when environmental rules mandated the engine breather vent to the engine intake, the turbo life of long haul trucks was being affected by fine oil particles in the air impacting the compressor impeller, thus the provent was developed.Actually it is the soot in the oil. The oil evaporates but the soot stays behind and forms a grinding paste...

We don't use our vehicles enough to have that turbo problem. The provent won't make your engine perform any better or be more reliable. It may however help the environment.

I we into the Arndell Park office of Mann and Hummel Today and had a good talk with the Tech guys, how they suggest I hook up the Provent is to add a 'T' into the line combining the upper rocker vent to the PCV hose, connect to the upper Provent connection, add an input to our Donadson air cleaner where the turbo connection is for the output of the Provent to vent back between the air cleaner and the turbo, the small output on the bottom of the Provent has a check valve in-line and connects to another 'T' connector in the Turbo oil return line.

I then went to Sydney Filters Services behind Mann and Hummel to purchase a Provent and check valve.

I think I know what I'm doing this Weekend, over the next couple of days I'll get some clamps, hoses and 'T' connectors.

Glenn