Hey guys, just looking fr some advice if I should be concerned or not. I have a fresh rebuilt D16 built for boost in my Crx. I have only 500 miles on the rebuild so far.

I emptied my catch can for the first time today and it was nothing but water, about 100-150mL came out, had very little oil in it, just some residue it seemed, and was almost perfectly clear.

Is there anyway water would get into the catch can by exhausting from the engine?? Im almost assuming it is because of the very cold climate where I am now, or possibly the undercar car wash sprayer I use possibly got that water in there as my catch can has alot of drilled holes on the top as the "vent"

Just curious if water could be getting/going through the engine really

 

What fuel are you running?

 

That's a sign of a very healthy motor, minimal blow by and it appears that all of the moisture in the crankcase is effectively being evacuated, as it will condense back to water in the can.

Also sounds like your catch can is setup properly, as having a lot of oil in the can is normally a sign that the lines from motor to catch can are too small and crankcase pressure is forcing oil out with it. Or it means you have ring sealing issues.

So no oil is a good thing.. how is your can setup? Vent yo atmosphere, drain back etc?
Any pics? I'm curious (and I'm sure others are) as to the setup because clearly it's functioning well

 

Yep, motors get quite warm and, especially during colder climates, will excrete (tehe) a lot of water vapor. Your catch can likely has been steaming when the car warms up as well. It is not bad, infact, like wantboost said, you've got a properly working catch can system.

 

these guys have it right, you are good to go. that water is just condensation.

 

x4

 

Dang, and I thought it was a side effect of running an ethanol based fuel. I had this same thing in my catch can as well. Had a faint odor to it. Smelled a little bit of alcohol. Good to hear that I am not insane, and that everything I feel I am seeing with my engine still holds true.

 

iirc ethanol will have slightly more water vapor in blow by.. due to the fuel and different stoichiometric ratios

It should have an odor, it should smell almost clean but faint like this inside of a motor Lol.