Saturn Sky Forum banner
1 - 20 of 26 Posts

·
Registered
Joined
·
39 Posts
Discussion Starter · #1 · (Edited)
Hand Automotive lighting Finger Gadget Gas
Finger Material property Nickel Gas Electric blue

Water Wood Liquid Tints and shades Metal

Recently replaced the MAF because I thought that was the issue throwing the check engine light for my MAF sensor, but turns out theres oil making it's was into the intake and wreaking havoc on the sensor. Any suggestions or ideas I can try to DIY before I head to my mechanic?
 

·
Registered
Joined
·
1,256 Posts
Is your K&N filter a pre-oiled one? You could try a dry filter replacement if it is?
The catch can is an option. Many of our owners have it installed.
How much oil is the question, a little or a lot? Keep plenty of cleaner spray on
hand until you solve this leakage. Has the oil leaked past the MAF towards the
TB? Is your car a turbo model RL? Are there any other signs of oil leaks anywhere
in the engine bay?

Keep us up to date- with your efforts.

LAC
 

·
Registered
Joined
·
994 Posts
That certainly looks like engine oil vs K&N filter oil. I used to run K&Ns on a few other vehicles and bikes so I'm familiar with K&N filter oil and it's basically a mineral oil that's dyed red. I'm thinking you have some engine oil blow back. An oil catch can is probably your best and easiest fix to get that remedied. That seems like quite a bit of oil making it's way down to the MAF.
 

·
Registered
Joined
·
4,702 Posts
I VERY much doubt that an oil catch can would help at all for oil on the MAF. First, it wouldn't be installed in any of the paths to the MAF, and second, if you really are getting that much oil blown UPSTREAM from the turbo, you have way more problems than just a dirty MAF.

Given that you state you have an oiled K&N filter, I would almost guarantee that is the culprit here.
 

·
Premium Member
Joined
·
440 Posts
Has anyone had experience with catch cans actually catching fluids?

All I’ve ever read about was how they’re installed... but no one has been able to retrieve unwanted fluids.

I’m used to oil separators from my pre-ecotec days and it’s my understanding that since our PCV‘s are locked inside the intake manifold, that there will always be oil seepage.

Anyone have more (and/or positive) experience with this?
 

·
Administrator
Joined
·
8,700 Posts
Has anyone had experience with catch cans actually catching fluids?

All I’ve ever read about was how they’re installed... but no one has been able to retrieve unwanted fluids.

I’m used to oil separators from my pre-ecotec days and it’s my understanding that since our PCV‘s are locked inside the intake manifold, that there will always be oil seepage.

Anyone have more (and/or positive) experience with this?
I do not have a catch can. I have seen a small number of posts that showed small amounts of oil caught. Most reports have indicated that nothing was collected.

The only posts I have seen that discussed oil contamination of the MAF have been related to oiled air filters, and installations of catch cans have been attempts to reduce or eliminate intake valve coking.
 

·
Registered
Joined
·
39 Posts
Discussion Starter · #11 ·
Is your K&N filter a pre-oiled one? You could try a dry filter replacement if it is?
The catch can is an option. Many of our owners have it installed.
How much oil is the question, a little or a lot? Keep plenty of cleaner spray on
hand until you solve this leakage. Has the oil leaked past the MAF towards the
TB? Is your car a turbo model RL? Are there any other signs of oil leaks anywhere
in the engine bay?

Keep us up to date- with your efforts.

LAC
Automotive tire Motor vehicle Automotive lighting Alloy wheel Wood

This was BEFORE I installed the CAI and took a picture of the oil that accumulated on the inside of the turbo inlet and there was also oil that accumulated in the stock intake as well, so this isn't a pre-oiled filter issue. This is a 2.0 RL and there are no other signs of oil leaks coming from the turbo.
 

·
Registered
Joined
·
39 Posts
Discussion Starter · #12 ·
That certainly looks like engine oil vs K&N filter oil. I used to run K&Ns on a few other vehicles and bikes so I'm familiar with K&N filter oil and it's basically a mineral oil that's dyed red. I'm thinking you have some engine oil blow back. An oil catch can is probably your best and easiest fix to get that remedied. That seems like quite a bit of oil making it's way down to the MAF.
Yeah, this is definitely engine oil, but I'm not sure how so much of it is making it's way back into the intake and coating everything. I'm definitely open to taking a catch can, but I'm afraid it's putting a bandaid on a bullet hole, so to speak. There has to be a larger issue at hand here.
 

·
Registered
Joined
·
994 Posts
Yeah, this is definitely engine oil, but I'm not sure how so much of it is making it's way back into the intake and coating everything. I'm definitely open to taking a catch can, but I'm afraid it's putting a bandaid on a bullet hole, so to speak. There has to be a larger issue at hand here.
The check valve is a known failure on the hose that connects the valve cover to the intake. This is most likely where the oil is coming from in the intake. The MAF sits pretty close to that nipple on the K&N setup so it's not too surprising oil would be getting sprayed on it depending on the pressures. Some of the other CAIs relocate the MAF closer to the filter like the GMPP and DDM one so that might help if the problem continues. Those are also dry filter CAIs as opposed to the K&N setup which does use a oiled filter. So either way it may resolve your MAF issues by getting a different CAI, plus the GMPP is CARB compliant.

I personally have no experience with an OCC, but I do trust DDM Works products as he has a lot of time and research into the products they have brought to the market and they have detailed the oil in the intake and developed an OCC kit specifically for our setup.
 

·
Registered
Joined
·
4,702 Posts
The check valve is a known failure on the hose that connects the valve cover to the intake. This is most likely where the oil is coming from in the intake. The MAF sits pretty close to that nipple on the K&N setup so it's not too surprising oil would be getting sprayed on it depending on the pressures.
I agree with the above. Take the check valve & flex pipe off and make sure it's not gummed up. Blow into the pipe end and it should block the flow, but you should be able to suck through it. If it passes air in both directions, it's gummed. Rinse with alcohol or kerosene or similar (or replace if that doesn't work).

See also: (22) Why & where you should/shouldn't run an Oil Catch Can (OCC) on an LNF kappa | Pontiac Solstice Forum
 

·
Registered
2008 Redline Manual, GMPP, AX car
Joined
·
177 Posts
I have CCan on my Trans Am and yes it certainly does trap oil. I don't have one on Sky V8 (yet) but will very soon. There are a lot of models out there. Some are better than others, and any decent one is better than none (but make sure it has some kind of filtering element).
I also have run a K&N filter on my TA since nearly the day I bought it and never ever had I seen oil from the filter on my MAF (over 50k miles). If you do, you put way too much oil on the filter to start.
 

·
Administrator
Joined
·
8,700 Posts
I have CCan on my Trans Am and yes it certainly does trap oil. I don't have one on Sky V8 (yet) but will very soon. There are a lot of models out there. Some are better than others, and any decent one is better than none (but make sure it has some kind of filtering element).
I also have run a K&N filter on my TA since nearly the day I bought it and never ever had I seen oil from the filter on my MAF (over 50k miles). If you do, you put way too much oil on the filter to start.
Catch can experience on a V8 is not going to translate to an EcoTec 4.
 

·
Administrator
Joined
·
8,700 Posts
Respectfully, they all work the same to do the same job. Routing for a turbo is different I know (NA vs pressurized).
Different engines are plumbed differently and have different needs, so experience with one does not apply to a different one.
 
1 - 20 of 26 Posts
Top