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Old 04-01-2012, 09:47 PM   #1
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Newly developed oil leak... Could newly installed catch can be to blame?

I'm not real sure where to post this, it doesn't really seem mantenance related, or bolt on related, seems pretty general, so here goes...

Went to drive the Camaro today, got to my Dad's and the car smelled of burning oil. (SEE PIC 1) Pop the hood and see there was oil on the top of the catch can, and running down the side... Weird, I wipe it off.. Open the drain valve, nothing came out at all. I didn't expect anything to come out, because I just installed the catch can 2 days ago on FRIDAY.

Yes, the hoses are going to the correct locations to the valley cover, and to the intake nipple. I triple checked the install and checked on here to make sure it was right on Friday...

Came home to picture #2 giant oil leak where the Camaro was parked last night. Huh, wtf? I checked the oil, and sure enough it wasn't even on the hash marked area. Drive to the shop, jack the car up look for oil leak... It appears to be coming from between the engine and trans, I assume the rear main seal...

Double check hoses on can again, the center one goes to the valley cover, and the outer one goes to the nipple on the intake just behind the throttle body... Checked to see if valves on can, and breather cap are operating, they seem to function normally. The can drain valve is closed. Open drain valve, start car, there is vacuum at the drain hose with valve open. Shut off car, close valve. Everything seems to function normally.

Did I forget something on the can install? It seemed pretty straight forward.

Back to Friday when I installed the can I had to remove the throttle body to access the hose from the valley cover to the intake and discovered oil on the back of the TB (PIC 3), the intake was moist, but there were no puddles of oil (PIC 4)... Does my car have blow by issues?

I parked the car in a different spot in the driveway, we'll see if I get another big spot tomorrow. I also removed the breather and put the stock oil fill cap back on, and reconnected the hose to the intake elbow for the time being.

The only thing that has changed is the addition of the can. It is an RX can. I'm not saying it's the can's fault, and it seems to function as normal. The car never leaked oil before, and currently has 17,000 miles on it.
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Old 04-01-2012, 10:02 PM   #2
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The car is not supercharged correct?
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Old 04-01-2012, 10:07 PM   #3
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The car is not supercharged correct?
The car is not supercharged, I'm too poor for that LOL

I see this was also moved, I guess it was not considered general. I didn't want to put it in the bolt on section as it could be a general problem not related to the bolt on RX catch can.
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Old 04-01-2012, 10:10 PM   #4
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Did you open the valve on the bottom of the can and test for vacuum there? It might be a stuck ball valve in the nipples of the can.
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Old 04-01-2012, 10:11 PM   #5
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Did you open the valve on the bottom of the can and test for vacuum there? It might be a stuck ball valve in the nipples of the can.
Yes I did, there is vacuum there with the valve open.
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Old 04-01-2012, 10:34 PM   #6
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I'm outa ideas, sorry. It sure does seem that your car is acting like the crank case is getting pressurized by a blocked PVC vacuum line though. Maybe send a personal message to sc1250 ?
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Old 04-01-2012, 11:11 PM   #7
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I will send him a message asking him to view the thread...
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Old 04-01-2012, 11:48 PM   #8
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To me, those who have this issue always have the breather installed with the RX CC. Anybody else notice this? I have the RX CC, without breather, and I have no problems so far.
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Old 04-02-2012, 12:19 AM   #9
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Quote:
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To me, those who have this issue always have the breather installed with the RX CC. Anybody else notice this? I have the RX CC, without breather, and I have no problems so far.
I have also noticed there seems to be a connection between the breather, and problems similar to this.
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Old 04-02-2012, 12:49 AM   #10
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I wonder if you might have accidentally got a V6 breather cap instead of a V8 cap? I understand that the V6 breather is metered to let less fresh air in than the V8 breather...

Best of luck. Hope this gets resolved soon.
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Old 04-02-2012, 12:43 PM   #11
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I had the same problem

I had 10k miles on my car with no problems. Had headers/tune/CAI and it ran fine.

Then I put on the RX can and breather and after 2-3k miles my car was gushing oil from the rear main seal. The tech at GM said the oil pressure in my car was double what it should be and my crankcase pressure was about to blow the engine.

Long story short, I removed the can and now all is good and the car runs perfect. If you poke around on here you will find quite a few post identical to this. Same problem, same leak, same burnt oil smell. Im not flaming the cans, in fact I still have mine (just not on the car) and I also have the RX ported TB on my car currently, which I love. I even triple checked to make sure the hoses were hooked up right and the can was actually creating a vacum and the valves were not broken. It all came down to the can and breather.

p.s. The dealership where I took in the car replaced the rear main seal under warranty, but said if I didn't remove the can, next time its not free. For something that was supposed to be cheap insurance, it almost cost me an arm and leg.
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Old 04-02-2012, 12:59 PM   #12
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Sounds like it may be the breather I will put stock cap and hose back on and leave can on. ( that cant hurt ? )I do get a oil smell once in a while since I installed can? yet no leaks but have less then 200 miles on can.
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Old 04-02-2012, 01:07 PM   #13
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I too agree it sounds like to me to be a breather issue.

Everyone that I've see who posts this problem has the breather cap installed as well. I've yet to see a thread or post from someone who has had this happen only have the catch can installed.

I have the RX catch can. I installed it first thing as soon as I brought the car home and that was a year and a half ago. I have zero issues with the can nor with my engine.
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Old 04-02-2012, 02:01 PM   #14
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Hey Tracy could you post the numbers here as to aprox. how many people have bought the CC and breather and how many have had this issue with the oil leak?
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