Jump to content
Sign in to follow this  
Ben Oweis

smoke coming out of breather on oil overflow

Recommended Posts

Hi Guys,

 

I had my SR20DET rebuilt in my 180sx less then a year ago with all new internals including new pistons and piston rings. The engine has only done around 6,000ks. I have noticed that there is what looks like smoke coming out of my breather filter that's connected to my oil overflow can. I have been told its potentially blow-by or something to do with the crank case pressure caused by the piston rings not sealing correctly? I'm just wondering if I could get some more opinions.

 

Just some things I should note:

- The engine doesn't blow oil out of the breather just smoke.

- The breather has a hole in one end where the smoke is coming out (its not closed off)

- The dipstick doesn't pop out.

- When I take off the oil filler cap when the motor is running it feels like air is coming out the hole.

- Engine performs great.

 

 

Any advice would be appreciated thanks.

Share this post


Link to post
Share on other sites

Was the engine run in correctly? What is the compression figures on all cylinders?

 

Is your PCV working correctly? If it is not working correctly, that could be causing an excess in gasses in the crankcase - which is being fed through the breather to the Catch Can.

Share this post


Link to post
Share on other sites

It's probably oil vapour, not smoke.

Share this post


Link to post
Share on other sites

Engine was run in properly following directions from my mechanic and from run in procedures researched online. I agree I think its oil vapour and not smoke, I will change the breather filter to one that doesn't have a hole in it and see if that stops the vapour coming out. Also can the PCV be replaced? is it a big job? how do I check if its not functioning correctly?

Share this post


Link to post
Share on other sites

Shouldnt your line recirculate from catch to the intake and not vent to atmo with a gay filter?

Share this post


Link to post
Share on other sites

Shouldnt your line recirculate from catch to the intake and not vent to atmo with a gay filter?

 

That is correct. If that is re-circulated, you will not notice the vapour as it will be sucked back into the intake.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Sign in to follow this  

×