Dodge Durango Forum banner

Catch Can Contents

15K views 42 replies 18 participants last post by  Raxons  
#1 ·
Hey everyone, like many of you, I have installed a catch can, and am surprised by the amount of oil that it collects! Glad that isn't going into by intake any longer. This may be a weird question, but what are you all doing with the oil when you check? Dumping it back into the crankcase, since it's just as clean as the oil in your engine, or disposing? Seems like it would be most convenient to simply unscrew the oil cap on top of the engine and dump it back in. Any reason not why or why not?

Also, how often are those of you with one installed on the Hemi checking the level? It's not a big pain to check, but seems to be no use in unscrewing the cap more often than necessary. I checked after about 1,500 miles and it was less than 1/4 full. At this point, it seems like I could just empty it with every oil change. Thoughts? Thanks.
 
#3 ·
I have a clear catch can and can see what I am collecting. I empty it at 1/2 full and dispose of it
STEVE
 

Attachments

#4 ·
Any particular reason not to reintroduce it to the crankcase to keep the oil topped off? Probably no big deal but it seems like it's identical to the oil that's in the engine at the time, or is it diluted/contaminated somehow?
 
#6 ·
Probably about 2K depending on driving style
Now I dont put it back in because especially this time of year it gets a bit of condensation in it as well, so I am not putting that snot back in my motor. We are talking about 3 oz or so
STEVE
 
#7 ·
OK, that makes good sense to me. Didn't think of that, and will be discarding mine as well. Thanks Steve. Your knowledge of the Durango and related issues is impressive...
 
#9 ·
Ivanstein, thanks for the detailed explanation. I didn't realize the technology of PCV had changed so dramatically over the years. I've saved mine in an old oil can since I first asked the question. I don't get a lot; about the same as Steve, but I sure don't want all that crap in my intake OR back in my crankcase. Not sure why all motors don['t have these, except many people are too lazy to do any maintenance.
Stuart.
 
#10 ·
All About pennies...the OEM thinks it works fine like it is
STEVE
 
#12 · (Edited)
They don't use catch cans Cuz it's cheaper with a pcv set up and less maintenance.
The only idiot oem I saw tried to change this was bmw they put in sense and vacumm pump to suck the vapors out. Omg what a piece of junk set up which always clogged up or the pcv lines rotted away from the oil.
The catch can does a great job when maintained.
 
#13 ·
Has anyone ever had problems with the dealer/warranty concerning catch cans? I am thinking about adding one to my 13 Ram but I'm still on the fence. I can see the benefits of using a can but it still doesn't seem like a major issue if you decide not to use one. If it is a warranty risk, then that is a deal breaker for me!
 
#14 ·
My Dealer has no issues whatsoever
STEVE
 
#16 ·
He will say you dont need it, Most hire putz's with no true auto background. My secretaries Husband is a service writer at another Dodge dealer he doesnt have any auto skills at all. This is why Other manufacturers kill dodge in service. All other manufacturers require a minimum amount of years as a tech before they can become a service writer.
Read this here>>> http://hsrd.yahoo.com/_ylt=A2KLtYxO...XV0by1icmFuZHMtdW5kZXItMjExNjAwOTI2Lmh0bWw-/RS=^ADANKzA0FQnvwi0CTeP4h9QSQQX18o-
My dealer has at least 3-4 enthusiast with chargers/Challengers that have them.
STEVE
 
#17 ·
When I worked for one dealer they would hire any one to be a service writer. It really sucked me being a tech trying to explain a issue to a person who knows that a car turns off and on . They were more concerned with robbing customers.

The oil the catch can removes does nothing inside the engine but get burned up or stuck to intake valves.
Make sure your lines are secure and the can is as well. They are gonna have a hell of a time trying to prove why a catch can should void a warranty .
 
#19 ·
It's never to late, over time the fuel spray will wash the intake valves off if they have any deposits on them.
If you feel your dealer would give you a issue its easily removed from your truck.
My last car was direct injected turbo car and they would nearly clogg the intake port with sludge from the blow by.
We are all motor so it's there, just not being forced down the engines throat by a turbo.
This is a mod you will not notice working I will add, it is simply a maintenance product.
When you go to empty the can you will say wtf is that doing in my engine and then you will say wow I'm glad I put the catch can on.
In the winter my cc contents would look like coffee with milk from all the moisture in the air.
Inspect it every 1000 miles and you should be fine.
Don't add that oil back to your crank case. It's contaminated .
 
#20 ·
Get one and get a Clear bottom then you can see when its filling up
STEVE
 
#23 ·
#24 ·
can someone comment on which way the oil blows? I just picked up the UPR catch can extended piece for the billet tech, and it actually differentiates for inlet side and outlet side

Is the front of the car inlet or outlet? vs the side closer to the firewall?
 
#25 ·
If possible, try blowing in each on the can and see if one side seems restricted, that will tell you if can is actually directional. My BT is non directional and I had wondered if it was as well when I installed. If your can is directional then start engine with hoses off and see if one side or the other seems to has positive pressure vs.vacume, if not then my guess would be that the front is the outlet. You might try putting your finger over each while engine running to see if you can feel a difference, (it won't be much and hardly noticable if at all).
 
#27 ·
#31 ·
ok i will bite
i had a 2009 SRT SRT8 challenger , never put a catch can on it, thought all the forums promoted the catch can addition.
so my car used oil for about 12k miles, then it never used any more.
please help me understand why i need a catch can. and what is the benefit?
Allan
 
#35 ·
No its not a Hemi "thing". They can be used on any car/truck that runs a standard PCV system that just dumps oil vapor back into the intake. The catch can catches and collects this oil vapor preventing it from going into the intake and depositing in the intake, on the valves, and diluting the air/fuel mixture. I ran a catch can on my 07 Chevy Trailblazer SS
 
#36 ·
Oil being introduced into the intake causes a decrease in your octane level and thus forces your computer to adjust to compensate which results in a loss of power (Albeit a small loss) fuel economy and potential knocking. Some potential issues that have been noted are.

• Intake ducting contamination if oil pools and run back out the intake system after engine shutdown
• Reduced octane of the air/fuel mixture, which can cause detonation and the ECM (Engine Control Module) to retard timing, thereby reducing engine power.
• Excessive carbon build-up on valves, piston crowns, combustion chambers and spark plugs. This also increases the chance of detonation and power loss.
• Increased emissions & possible contamination of catalytic converters and oxygen sensors.
 
  • Like
Reactions: REDRUM
#37 ·
The long version of what I was trying to say;) After running one on my TBSS I wouldn't not run one on any future vehicles that I care about and plan on keeping.
 
#39 ·
#41 ·
You dont need to do anything to add a catch can at all. Just add it
No tuner available for 15's anyway, it involves a new PCM etc.
Just get the catch can with right mount and start protecting that HEMI
STEVE
 
#42 ·
I installed my BT catch can after having installed a custom tune. Do I need to retune? Or is this a negligible affect to my setup?