Oil Catch Can. Yes or No?

[HenryMac]

Even your obnoxious screen shot doesn't support that claim. The words "fine droplets of a substance and air" aren't anywhere in that. Now, if you check the dictionary.com definition of "aerosol" you'll find "colloidal particles dispersed in a gas", which sounds a lot more like what you originally wrote. It's an important distinction, because what you need to do to get a liquid out of a vapor is different from what you need to do to get a liquid out of an aerosol.

Geeze... have fun with all this Mike.

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[Gixxers]

I have the MM catch can on my 19 ranger and have a fuel smell from it. I just spray the hoses and can with simple green when I empty it. Does anyone else have that smell? I have read that most catch cans do this and it is normal

Yeah its normal, you can eliminate the smell buy using a/n fitting and better O rings.

 

[task65]

Yeah its normal, you can eliminate the smell buy using a/n fitting and better O rings.

So replace the orings on the two fittings atnthe can or even replace them with better fittings?

 

[Gixxers]

So replace the orings on the two fittings atnthe can or even replace them with better fittings?

Replace the o rings within the can with the proper one than Replace the fittings with a/n fittings and you will have no smell. Sucks but the company's make good cans but use cheap rings and fitting that are not rated for the what they are used for.

 

[jblc]

Replace the o rings within the can with the proper one than Replace the fittings with a/n fittings and you will have no smell. Sucks but the company's make good cans but use cheap rings and fitting that are not rated for the what they are used for.

Hmm, good thoughts.

"Replace the o rings within the can with the proper one"
Which one is the proper one?

"Replace the fittings with a/n fittings"
Do you mean, replace all the fittings (except the ones that go to the engine) with a/n fittings?

I had thought that the fittings to the engine were also loose, and so also cause smell. Someone had mentioned adding a 2nd O-ring to eliminate smell, but when I called UPR to ask about that, they said that it was a bad idea -- and that their connectors are the same tightness / looseness as Ford's OEM connectors.

 

[Gixxers]

Hmm, good thoughts.

"Replace the o rings within the can with the proper one"
Which one is the proper one?

"Replace the fittings with a/n fittings"
Do you mean, replace all the fittings (except the ones that go to the engine) with a/n fittings?

I had thought that the fittings to the engine were also loose, and so also cause smell. Someone had mentioned adding a 2nd O-ring to eliminate smell, but when I called UPR to ask about that, they said that it was a bad idea -- and that their connectors are the same tightness / looseness as Ford's OEM connectors.

Use viton o rings, I replaced the fittings at the can with a/n fittings. Like I said good can but cheap components considering the cost.

 

[Mike PD]

Found this on line. https://www.stratifiedauto.com/blog/understanding-your-pcv-system-upgrades-and-catch-cans/ Its from 2017 but still an interesting read.

 

[Trigganometry]

I have the MM catch can on my 19 ranger and have a fuel smell from it. I just spray the hoses and can with simple green when I empty it. Does anyone else have that smell? I have read that most catch cans do this and it is normal

smell is from the hoses they use. It’s permeable so you smell gas. PTFE lined hoses will not. They can be difficult to work with though so it’s understandable why they supply the non lined hose

 

[billwinkle]

I just retired from a Subaru Dealer in So Cal. (moved to N.C. as soon as I did) I dealt with Quirt Crawford and Ken Block when he was still racing Subarus. Quirt designed the first catch can for Subis. He found even new WRX engines with oil already in the intercooler. He tried to tell the engineers at Subaru this was a major reason why we were replacing so many engines under warranty. but they would not listen. I think Subaru was a bigger problem than our rangers but I am putting one on my new Ranger just to play it safe.

 

[Msfitoy]

Yes for my high performance, high output, high reving sports cars...not necessary for my lazy driving style Ranger...

 

[HenryMac]

"IC" what's that an abbreviation for?

 

[HenryMac]

So how would the crankcase gases that air piped into the intake go against the airflow and end up in the intercooler?

 

[Jacob]

So two weeks ago I went to drain the catch can and nothing came out. Thought oh it’s been dry out here probably not a whole lot of built up fluid. I was wrong. Took off the can today and it was completely gummed up with crap. Took it apart and cleaned the hell out of with with my trusty carb cleaner. The picture is of the chunk of crap that dropped out of the drain once I broke it free. Just reinforcing why I’m glad I installed a catch can

 

[Doc]

My Catch Can …

 

[DavidR]

So how would the crankcase gases that air piped into the intake go against the airflow and end up in the intercooler?

They're not going against the airflow, they're just getting introduced at a different point. In turbo engines, there are two paths that crankcase gases can take in order to be recycled into the intake. When manifold pressure is negative, i.e., the engine is behaving like a normally aspirated engine and there is vacuum in the manifold, the gasses go through the normal PCV valve -> intake manifold path. When the turbine compressor is creating enough pressure that the manifold pressure is positive, this path no longer works, so crankcase gases are routed to the intake of the compressor, which will have negative pressure at those times. From there, it travels through the compressor and through the intercooler along with the compressed air. As a result of this, oil in the blow-by can end up accumulating in the intercooler.

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