do i need a crankcase breather?
This is a discussion on do i need a crankcase breather? within the General Help forums, part of the LSx Technical Help Section category; this is a sketch of how i have my pcv attached. on the drivers side i have it coming from ...
06-03-2011, 03:32 PM #1
do i need a crankcase breather?
this is a sketch of how i have my pcv attached.
on the drivers side i have it coming from the back of the valve cover to the catch can. the port which has the pcv valved attached.
on the passenger side.
the rear valve cover port is sealed.
the front valve cover port is going to the back of the tb.
catch can the other port on the catch can is going from there to the intake.
i was just wondering if it was good that way or if i should add a breather to the oil cap to get fresh air into the crankcase?
i have the stock ls1 valley.
catch can is a revx.
intake is a ls6
06-03-2011, 04:34 PM #2
i did put a small breather on the stock oil cap. I drilled a hole on top of it and put the breather on it. You know you don't need a breather. The way you connect everything is correct. i have mine the same way.
I took it off because i started to smell burnt oil inside the car when the a/c was on. Frost warn me about that.
here is how I made it:
Last edited by JayTA98; 06-03-2011 at 04:36 PM.
06-03-2011, 04:38 PM #3
thanks man. so i guess its a no go.
also wanted to make sure if was connected correctly.
06-03-2011, 07:58 PM #4
if you can post a pic of the can installed. If it is the cylindrical style the hose coming from the driver's side cover connects to the top of the can. The bottom outlet connects to the intake.
06-04-2011, 04:25 AM #5
- Join Date
- Oct 2008
- Coral Springs, Fl
Sunset Orange Metalic
- 2001 Camaro SS
If you were to delete your yellow hose and cap off the valve cover then yes you would need it
06-07-2011, 04:26 PM #6
sorry for the late responce.
i went ahead and removed the catch can today to see how much oil it had collected in the last 3000-5000k or so.
it did get some but not much.
anyways i got some pictures and after looking at my diagram and the way i had it on the car it was different.
this is how much oil it had.
this is how i had it setup. i think its wrong right?
this is basically like how it would be off of my diagram.
but then again lets say i had it connected wrong then it wouldn't had trapped any oil right?
sorry didnt add the [img] to the pics since they are big pics.
06-07-2011, 04:49 PM #7
The last image looks to me like the correct one. You won't have any issues but I believe that the input(where it comes from the PCV) has to go where the small filter is. Canisters are different so you have to look at it. The reason of the filter is to catch the particles of sprayed oil and let it drip in the canister while the air passes clean to the open output (to the TB).
06-07-2011, 05:11 PM #8
i will just go ahead and leave it that way (like the last pic) and see if i notice
the reason why all this got my attention is because lately i've been seeing little small leaks of oil. and since i saw that crankcase pressure can be the issue here.
thanks for the help. i will report back on this in a few days or so to see how its doing. tomorrow im going to clean the bottom to remove the oil stains and see if my opsu is the culprit or possibly the oil filter. i dont think its the rear main or pan gasket since i see oil a little higher.
06-08-2011, 09:03 PM #9
I've got the same Catch-can (Revx.)You had it correct going in the middle/out the PCV to the intake.
06-08-2011, 11:33 PM #10
06-09-2011, 02:23 PM #11
- Join Date
- Apr 2011
- 1999 Trans-Am, 2012 Sonic
I went with the universal breather and catch can as stated above and worked out perfect, also had a ses light on for o2 sensor, after running it after install I could smell the cats, few rips on the gas and the ses light went off and has not come back on! I wonder if the clean air to the intake burned out any old oil left behind and cleaned up the o2 sensor? Any rate I very happy to lose the light
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