Pcv valve

[Lunentucker]

Quick update, and @Lunentucker might be interested in this one since he also bought the same can. I've got just under 1000 miles on mine so I cracked it open to see what was in the can. Right now, I have a couple of ounces of oil and definitely water from crankcase condensation as the mixture has a milky consistency to it.

I also removed the PCV hose going from the can to the intake manifold too see if it was truly stopping anything from getting into the intake. I noticed these small balls of red "goo" about 2mm in diameter just inside the intake manifold and looking into the hose I could see more. I cleaned them out and reached out to J&L. They said this is red grease they use during assembly since the parts fit so snugly and "not to worry" about it.

I went ahead and cleaned out the hose, but I wasn't too thrilled with grease getting sucked into my intake. It was not a lot (maybe a couple of cc's worth).

I have peeked a couple of times. I am approaching my 1000 mile point that I had preset to empty the can, as that will give me a decent indication of how often I should empty and whether or not it can go a full 5,000 between changes.
So far, it's maybe 1/6 full on the standard sized can, and it's very much as you described. an oily water.
The way I see it, it can't do any harm, and it may do some good.
It's not really taking up any space that's otherwise needed, weighs next to nothing, isn't in my way for getting to anything else.

Sponsored

 

[willys 41]

I have never seen water in my Willys and only once in my Rubicon
Maybe because I always warm up both to about 185 degrees before I drive away
I have always warmed up all my cars and trucks for the last 50 years
I don't know whether it makes any difference

 

[OHJeeper]

The Starbucks over-priced drink look is an emulsion if it's a tan or brown color and ironically, is often mostly water. So 2 ounces of the emulsion may be under 1 of oil.
You are one of the few who actually honestly said "oil and water".

For every real ounce of oil caught, it means your crankcase is down that same amount. Can't be anything but.

I pulled the dipstick after sitting overnight - wasn't even noticeable. I'm sure it's mostly water in the can, or maybe 1/2 and 1/2 (an Americano, to use your Starbucks reference ? )

J&L says to empty every 10k. I'll take a peek at my next oil change which is way before that mark anyway.

 

[Minty JL]

I was running the Corsa catch can and that thing was sucking a ton of oil (yes, it was installed properly).

I want to go with the Mishimoto like I have on my JLUR. If I order I will have to modify the bracket as my ARB breather is where Mishimoto wants me to install the catch can

 

[ShadowsPapa]

I have peeked a couple of times. I am approaching my 1000 mile point that I had preset to empty the can, as that will give me a decent indication of how often I should empty and whether or not it can go a full 5,000 between changes.
So far, it's maybe 1/6 full on the standard sized can, and it's very much as you described. an oily water.
The way I see it, it can't do any harm, and it may do some good.
It's not really taking up any space that's otherwise needed, weighs next to nothing, isn't in my way for getting to anything else.

U and the fellow from OH, voices of reason and logic.

 

[Lunentucker]

Emptied the can today. 1500 miles. Probably around 30-40 hours of run time.

That much amortized over that many hours and miles probably isn't going to make a huge difference, but it's not getting back in and probably not hurting anything to filter it out.



There was a small amount of "mud" in the bottom that had to be diluted with solvent and wiped out.
Thick water.

 

[Escape.idiocracy]

I have never seen water in my Willys and only once in my Rubicon
Maybe because I always warm up both to about 185 degrees before I drive away
I have always warmed up all my cars and trucks for the last 50 years
I don't know whether it makes any difference

Hope you go for a long drive after letting it do that…. If not I am willing to bet an oil analysis will show high fuel dilution…

 

[OHJeeper]

I just got back from a trip to Windrock and put about 1000 miles on my JT, mostly highway but also about 10 miles of trails (I only had one day, sadly). As I was doing my post-ride inspection I also checked my catch can... it was almost full. So, roughly 2000 miles and about 3 ounces of oil:

I was reading on another thread about how lower temps cause catch cans to emulsify - that the water isn't coming from the crankcase, but is a result of the catch can condensating.

When I checked at my first 1000 miles I definitely had the "latte" look, but with the warmer temps, the oil in the can just now was ... oil!

 

[ShadowsPapa]

I just got back from a trip to Windrock and put about 1000 miles on my JT, mostly highway but also about 10 miles of trails (I only had one day, sadly). As I was doing my post-ride inspection I also checked my catch can... it was almost full. So, roughly 2000 miles and about 3 ounces of oil:

I was reading on another thread about how lower temps cause catch cans to emulsify - that the water isn't coming from the crankcase, but is a result of the catch can condensating.

When I checked at my first 1000 miles I definitely had the "latte" look, but with the warmer temps, the oil in the can just now was ... oil!

That looks like oil, not an emulsion like so many post when bragging about their catch can (and that's really what some of it is in a few cases).
Might be cool to keep a log of the miles and the ounces recovered and then when you reaches 16 ounces total recovered, it should be down 1/2 quart on the stick.
Measure it.
Once you recover 32 ounces, it should be just a bit over a quart low. (due to the fact that there's nothing that stops 100% of all oil - not good rings, not good anything)

For those with low miles, like under 10,000 miles, it's likely to show a bit more than after 10,000 miles.

 

[willys 41]

I just got back from a trip to Windrock and put about 1000 miles on my JT, mostly highway but also about 10 miles of trails (I only had one day, sadly). As I was doing my post-ride inspection I also checked my catch can... it was almost full. So, roughly 2000 miles and about 3 ounces of oil:

I was reading on another thread about how lower temps cause catch cans to emulsify - that the water isn't coming from the crankcase, but is a result of the catch can condensating.

When I checked at my first 1000 miles I definitely had the "latte" look, but with the warmer temps, the oil in the can just now was ... oil!

If possible. You can do what I did and add 3 or 4ft. long 1/2in. drain hose with a ball valve at the end of the hose. This will keep the oil out of the can and away from the PCV system and make it very easy to drain.

 

[OHJeeper]

That looks like oil, not an emulsion like so many post when bragging about their catch can (and that's really what some of it is in a few cases).

Yep, just oil... and no emulsion/mud at the bottom like what @Lunentucker saw in his. Not sure why, though.

 

[ShadowsPapa]

Yep, just oil... and no emulsion/mud at the bottom like what @Lunentucker saw in his. Not sure why, though.

Probably because of his orange trim?

Could probably list a few reasons but won't matter much - yours got oil, there's no question.

 

[OHJeeper]

Probably because of his orange trim?

?

 

[Lunentucker]

Probably because of his orange trim?

Could probably list a few reasons but won't matter much - yours got oil, there's no question.

I use water to detail the inside of the valve covers.

 

[ShadowsPapa]

I use water to detail the inside of the valve covers.

Once again, can always count on you.
Now I have a new trick for detailing the inside of my engine for car shows.

Sponsored