Ford Focus ST Forum banner

1 - 5 of 5 Posts

·
Registered
Joined
·
31 Posts
Discussion Starter · #1 ·
I installed my Damond Catch Can (the one that mounts by the driver side wheel well) about 10k miles ago. I have drained it numerous times. But this time I noticed a very milky fluid. It was watery/runny and smelled heavily of gas. I smelled the oil on the stick, as well as the cap, which resulted in the typical oil smell.. no gas. Not sure if it's common to have a gas smell in the occ or not on these vehicles.
 

Attachments

·
Registered
Joined
·
474 Posts
Very common to have a gas smell in catch can fluid. Mine has it too. Outside temps seem to have an effect on what the fluid looks like coming out of the catch can. In winter I tend to have slightly more of the light brown stuff. No worries.


Sent from my iPhone using Tapatalk
 

·
Registered
Joined
·
768 Posts
^ Agreed ^

I did an oil sample with my last oil change and about 2,000 miles or so with the can installed; zero traces of fuel in the oil.
 

·
Premium Member
Joined
·
1,152 Posts

·
Registered
Joined
·
206 Posts
Yup, totally normal. During the colder months you'll have more condensation inside your crank case when your engine is cold. When your engine heats up, that water turns into vapor and gets carried to the OCC where it hits baffles or some type of media, condenses and turns into that milky liquid for you to drain. Same thing for the gas smell, you'll have some unburned fuel slip by piston rings, blow-by, etc., and recondense in the OCC. So while an OCC is intended to catch oil vapor, it also catches a couple other things too that you don't necessarily want reintroduced into your intake manifold.
 
1 - 5 of 5 Posts
Top