Fitted pro vent to td5

[wozapinin]

Fitted a pro vent catch can to the td5 and thought I’d better share.
152916
Simple bracket from angle iron
152917
With the pro vent fitted
152918
Bolted on the fire wall using the existing bolts
152919
Different angle
152920
Plumbed in.
Rough enough for the bush😁

[twr7cx]

As he Provent has its own built in PCV the factory one in the air intake tube between air filter box and turbo becomes redundant and can be replaced with a 3/4” or 19m, right angle elbow.

[PhilipA]

Good one if no second battery.
I covered fitting a 100series equivalent with a second battery a while ago.
Regard sPhilip A

[Bohica]

I have one in that position, with the Aux batt on the air compressor shelf.

[Noisy]

I have one in that position, with the Aux batt on the air compressor shelf.

If you are talking about the sls compressor shelf, then that is the same set up i wanna do. Have you had any issues with it, as people seem to think its not an ideal spot for it.

Also to the OP nice job on the install, bracket is simple, yet effective

[Bohica]

If you are talking about the sls compressor shelf, then that is the same set up i wanna do. Have you had any issues with it, as people seem to think its not an ideal spot for it.



You are limited in battery size. I'd recommend putting some thin sheet to help protect it. My metal sheet is a bit short. I installed this in July 2017. It is a bit of a pain to instal the battery, if you are lying under the car. A hoist would help. No issues so far. If you go in the sea, you will have electrolysis ocuring at the terminals. Nothing to worry about, and you can always cover the terminals with Vaseline or similar.
The only picture I could find.
What happened to your Discovery 2 today? (https://www.aulro.com/afvb/discovery-2-a/232420-what-happened-your-discovery-2-today-181.html)

[laslo71]

Fitted a pro vent catch can to the td5 and thought I’d better share.
152916
Simple bracket from angle iron
152917
With the pro vent fitted
152918
Bolted on the fire wall using the existing bolts
152919
Different angle
152920
Plumbed in.
Rough enough for the bush😁

What was the reason to install Provent? Too much oil in breather hose? I am also thinking about it as I have quite a lot of oil comes out from the hose when I remove and place it in vertical position. See photo. Some peaple says it is normal.
My problem is that I have no place on the left side only on the right (my car is LHD) which means much longer pipes and more difficult routing.153530

[Kaaaiju]

We're do people put the provent when there is an ARB compressor then? As I don't much room any where else?

[Bohica]

I have seen one mounted over the suspension turret

[onebob]

We're do people put the provent when there is an ARB compressor then? As I don't much room any where else?

I have an ARB compressor on an ARB auxillary battery shelf - I am in the process of installing a PROVENT 100 and it will be bolted to the heat shield plate / battery clamp that came with the shelf when purchased. Will post photos well done.

[onebob]

As he Provent has its own built in PCV the factory one in the air intake tube between air filter box and turbo becomes redundant and can be replaced with a 3/4” or 19m, right angle elbow.

I would leave it in..... it’s a DCV ie a Depression Control Valve, it’s there to regulate the crankcase pressure. It’s normal state is open - unless the engine is breathing really hard, whereby it progressively closes as engine speed increases, thereby limiting depression in the crankcase. Its operation is the reverse of Positive Crankcase Ventilation. Nothing is gained by it’s removal.

[Bohica]

I would leave it in..... it’s a DCV ie a Depression Control Valve, it’s there to regulate the crankcase pressure. It’s normal state is open - unless the engine is breathing really hard, whereby it progressively closes as engine speed increases, thereby limiting depression in the crankcase. Its operation is the reverse of Positive Crankcase Ventilation. Nothing is gained by it’s removal.

Any disadvantage to its removal? [bigwhistle] Just curious!

[onebob]

Any disadvantage to its removal? [bigwhistle] Just curious!

Any disadvantage to its removal? .... yes, but how much depends on how hard the engine works. The CDV actually controls pressure/vacuum in crankcase to prevent oil consumption through the intake system via the turbo air inlet. For example when the Td5 takes a sudden deep breath, like what happens when the auto trans kicks down and the revs slam up to 3000+ plus in a nano second, the CDV valve will in that circumstance be pulled and held closed until the revs diminish.

[onebob]

We're do people put the provent when there is an ARB compressor then? As I don't much room any where else?

I bolted mine to the Aux battery shelf’s heat shield...
https://uploads.tapatalk-cdn.com/20191020/2fb19066b7a8425c78c97e43ed93220d.jpghttps://uploads.tapatalk-cdn.com/20191020/ba0d3e30de6f45a5b0b3d989ee62da11.jpg

[onebob]

Any disadvantage to its removal? .... yes, but how much depends on how hard the engine works. The CDV actually controls pressure/vacuum in crankcase to prevent oil consumption through the intake system via the turbo air inlet. For example when the Td5 takes a sudden deep breath, like what happens when the auto trans kicks down and the revs slam up to 3000+ plus in a nano second, the CDV valve will in that circumstance be pulled and held closed until the revs diminish.

I’ve had my PROVENT installed 1 week now and I’ve changed my thinking - yes the CDV in a factory configuration is there to prevent the engine consuming (sucking) oil under high inlet vacuum / high engine speed situations, however a PROVENT will perform that function also when installed. I imagine also that a PROVENT would be most efficient operating with a constant air flow, especially under high speed engine conditions / high inlet vacuum situations when blow-by gasses would be at their greatest, however a CDV under these conditions would be pulled closed, and shut off crank case breathing altogether for the duration....
I have replaced my CDV with a brass elbow.

[twr7cx]

I have replaced my CDV with a brass elbow.

Welcome to the club! You’ve reached the same conclusion a group of us had in discussions sometime ago.

[onebob]

Welcome to the club! You’ve reached the same conclusion a group of us had in discussions sometime ago.

Thank-you [emoji4] .... at first it occurred to me that with the CDR and now a PROVENT inserted into the breather circuit it would slow down the air velocity and volume and perhaps work to pressurise the crankcase instead of maintaining the normal de-pressurised situation. Although the normal state of the CDV is ‘open’ a peek inside of it revealed it’s design created some restriction and that a 3/4” or 19mm elbow would allow more more air / gas to pass. All things considered i thought it best to have ‘full time’ crankcase ventillation. Cheers

[PhilipA]

I must admit I haven't looked closely but my impression is that the diaphragm in a Provent and others is a pressure relief valve that opens when the filter is blocked.
Regards PhilipA

[onebob]

I must admit I haven't looked closely but my impression is that the diaphragm in a Provent and others is a pressure relief valve that opens when the filter is blocked.
Regards PhilipA

The valve in discussion (CDV ie crankcase depression valve) is the disc shaped valve at the end of the factory breather pipe that connects onto the rubber bellows pre turbo.

[PhilipA]

The valve in discussion (CDV ie crankcase depression valve) is the disc shaped valve at the end of the factory breather pipe that connects onto the rubber bellows pre turbo
I am aware of that and how the CDV works. I have also pulled one apart. It works by inlet depression pulling it shut and is usually open.
The point I was tentatively making is that Many think that the valve in a Provent can replace the valve.

First I have never seen specs on the manifold depression required to shut the valve or even if the valve is a CDV.
After having a look at my fake one a week ago, I wondered if it was actually a relief/bypass valve for when the filter became blocked. In other words the opposite of a CDV. Can anyone confirm the function of the valve? I cannot recall it's function in the specs as listed on the Mann Hummel site.
In the meantime I have left my CDV alone.
Regards PhilipA

[onebob]

I am aware of that and how the CDV works. I have also pulled one apart. It works by inlet depression pulling it shut and is usually open.
The point I was tentatively making is that Many think that the valve in a Provent can replace the valve.

First I have never seen specs on the manifold depression required to shut the valve or even if the valve is a CDV.
After having a look at my fake one a week ago, I wondered if it was actually a relief/bypass valve for when the filter became blocked. In other words the opposite of a CDV. Can anyone confirm the function of the valve? I cannot recall it's function in the specs as listed on the Mann Hummel site.
In the meantime I have left my CDV alone.
Regards PhilipA

Ah! Now I understand where you’re coming from... on a Provent 100 / Flashlube Catch Can Pro and presumably their clones - the bottom side vent near the inlet pipe is the pressure relief value and the top vent above the outlet pipe is the vacuum relief valve. When the filter blocks both vents open to atmosphere.

[wozapinin]

What was the reason to install Provent? Too much oil in breather hose? I am also thinking about it as I have quite a lot of oil comes out from the hose when I remove and place it in vertical position. See photo. Some peaple says it is normal.
My problem is that I have no place on the left side only on the right (my car is LHD) which means much longer pipes and more difficult routing.153530

Sorry for late reply. I fitted the “catch can” because it catches the oil before it gets into the intercooler and pipes, which effects performance. I’m sure theirs other reasons but my motor passed a lot of oil through.

[Bohica]

Sorry for late reply. I fitted the “catch can” because it catches the oil before it gets into the intercooler and pipes, which effects performance. I’m sure theirs other reasons but my motor passed a lot of oil through.

I added mine to improve the air getting into the engine, and to extend the inter cooler cleaning kms up to 380k kms