Catch Can on the Caravan (250km)

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Good move
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I was thinking of collecting all the junk it collects over the course of a year in a gallon container to see the cumulative amount going through my engine otherwise. I should put on about 50K KM (30K miles) in a year.
 
Originally Posted by StevieC
I was thinking of collecting all the junk it collects over the course of a year in a gallon container to see the cumulative amount going through my engine otherwise. I should put on about 50K KM (30K miles) in a year.



That'd actually be interesting to see. Could also distill out the water portion of it and see how much of it was oil/solids.
 
Originally Posted by OVERKILL
Originally Posted by StevieC
I was thinking of collecting all the junk it collects over the course of a year in a gallon container to see the cumulative amount going through my engine otherwise. I should put on about 50K KM (30K miles) in a year.



That'd actually be interesting to see. Could also distill out the water portion of it and see how much of it was oil/solids.

I think it might separate out over time but yeah, I'll keep that in mind if it doesn't. That's a good idea.
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JC1 - https://www.amazon.ca/gp/product/B072JW82S1/ (Canada)

For everyone else in the U.S. that might be interested - https://www.amazon.com/Twilight-Baffled-Universal-Aluminum-Reservoir/dp/B07CM3FF9P (Same Design)

The hose it comes with is terrible. I found 1/2" Fuel Hose on RockAuto as I had a hard time finding it locally. (1/2" fits the bigger fittings the can comes with perfectly) You can also shove the 3/8" fuel hose into the 1/2" fuel hose if you need to go from one size to the other. It fits snugly.

3/8" Fuel Hose which is the other common PCV size is available most places and fits the smaller fittings this can comes with.

Don't use Vinyl hose or heater hose or garden hose. It's not good long term with the vapor traveling through it.
 
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How long does it take for that amount to accumulate? Also, is the rate of accumulation consistent or variable depending upon conditions, usage, etc.? Nice install, btw.
 
Originally Posted by ekpolk
How long does it take for that amount to accumulate? Also, is the rate of accumulation consistent or variable depending upon conditions, usage, etc.? Nice install, btw.

I just put it on, on Friday and it has been 250km since then. The photo above is the first check since installing it on the Caravan. I did have it on my Highlander previously and it caught just oil but this was in the summer when there is a lot less condensation and higher under hood temperatures to evaporate it so I think this is why it's milky now and wasn't in the summer.

I have saved some to let it separate out in a water bottle to see how much oil and how much moisture.
 
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Originally Posted by JC1
Thanks Stevie. In your pics I cannot see where the lower hose goes. I'm guessing there was a small hose that connected the two connectors?


The OEM setup is Bank 1 Camshaft (at the back in the Caravan on the right side) has the PCV valve mounted to it and there is a boot, then a plastic line and then another boot where it connects to the intake. I took the plastic line off the boot for the Intake, attached the one hose to the plastic line to go to the can's input. Then out of the can on the output side it goes over to the boot on the Intake. I took the 1/2" hose and just pushed it into the boot. (Nice and snug)

This way if I want to take it off I haven't modified the OEM parts and can put it back.

No making fun of my mad MS-Pain skills.
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PCV Caravan Modification.webp


PCV line Routing.webp
 
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Originally Posted by StevieC
Originally Posted by demarpaint
Originally Posted by StevieC
Its -4F (-20c) today and its liquid still.

I ran the hoses by the engine so it should keep them warm until it get to the can.

I'd be interesting in how long the mix can sit w/o freezing in a vehicle that isn't driven during the cold weather everyday.


I will take the next sample and let it sit in a water bottle out in the cold for a couple days and let you know.

Thanks.
 
Just in case the above is confusing... Here is where it's normally connected so you know what I'm talking about disconnecting to make the modification.

Normal Connection.webp
 
Originally Posted by antonmnster
It can and *will* freeze. The result of that isn't pretty.


I have had a catch can on a different vehicle in the winter it was fine and it gets pretty cold here in February, I will of course monitor.
89 VW Cabriolet (Used to catch about 1/2 this can's size in an OCI. It was a milky emulsion similar to above)

Today it was -17c (1.4F) and the liquid shown in the first picture was cold as the van had sat for a couple hours before I started mucking around with it today. It gets colder than this in February but I don't see it being an issue. It's using 1/2" hoses as well so there is lots of open area for flow and the hoses and catch-can get warm to the touch while driving. Similar to grabbing a hot upper radiator hose.

The hoses are also running right beside the engine where there is ample heat as well.
 
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I had to go to my office today for a meeting. It's an 85km trip from the house one way.
When I got to the office, I pulled out the dipstick for the catch can and it shows liquid in there again.

I didn't bother to empty it out but I'm going to see if it freezes over the course of today in these really frigid temperatures we are having. (-18c / -1F)

I'll check it before restarting the van to go home. Should be 8 hours or more by that point.

temp.webp
 
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When I took the dogs out our weather station said it was -21c though... I think we are a bit warmer because we are right at the lake and because temps have been mild until now the lake is still quite warm so it affects local weather. My office is North of Toronto which I expected to be colder but it isn't.
 
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What is this supposed to fix? I know some people swore that catch cans were required for DI motors; I can accept that some vehicles (DI or otherwise) may need further engineering to overcome problems (TDI's with intake gunking being a great example). But I was not aware of a problem with the Pentastar motors, outside of cylinder heads (long rectified) and rocker arms (also a past issue?).

Water is a normal byproduct of combustion, so having water vapor in the PCV system would be expected.
 
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