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Custom Dodge Ram Performance Mods - Engine - 5.7 HEMI V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!
Factory Spec: 5.7-liter HEMI® V8 engine - 390 horsepower, 407 lb-ft of torque.


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  #11  
Old 12-04-2010, 12:09 AM
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Quote:
Originally Posted by RamTex View Post
Ok so im changing my oil for the dyno day tomorrow and this is what i found in my catch can should i be worried? Last time it was a lot darker. The oil from the pan was normal colored.
I emptied my catch can this past week also. My oil in the can was exactly the same. The first time I emptied the can it was normal color too. Hope it's nothing to worry about.
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  #12  
Old 12-04-2010, 10:34 AM
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awesome thanks for all the responses i like having this catch can its great to see that all that mess didnt run through my entire engine system WTG CATCH CAN!
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  #13  
Old 12-04-2010, 09:24 PM
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Quote:
Originally Posted by HEMILANCER View Post
it probably got moisture in the can from somewhere. i've seen that under oil caps on older cars when the cap doesnt seal well
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Originally Posted by sprintertech View Post
probably condensation.....if the oil in the pan dont look like that i wouldnt be worried....
looks like some moisture build up like already stated. Do you make a bunch a "short" trips where the truck doesn't quite get up to temp?

If you want to run a comparo test try putting your OEM t-stat back in and see if your can looks like that at your next oil change.
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  #14  
Old 12-04-2010, 11:06 PM
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Cold air on aluminum catch can,,, hot crankcase fumes on cold aluminum,,,
Condensation be my guess.
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  #15  
Old 12-05-2010, 03:08 PM
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Nothing to worry about. It is colder in NE this time of year and you are getting condensation in with the oil, especially in a remote catch can. I got that on the underside of my oil cap every winter.
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Old 12-16-2010, 02:42 PM
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What is a catch can for? Where does it mount? Whats its purpose?
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  #17  
Old 12-17-2010, 02:07 AM
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Quote:
Originally Posted by RamManiac View Post
What is a catch can for? Where does it mount? Whats its purpose?

Its for catching oil pushed into the intake system by crankcase pressure. Most late model vehicles have a PCV, which makes the engine "burn" the crankcase pressure rather than vent it to atmosphere. Pollution reasons.

A catch can is used to try and "catch" the oil pushed into the intake tract by crankcase pressure.

As for the cafe mocha in the first pic, its normal when in winter months and higher humidity. If the oil in the pan looked like that, you'd have a problem. My old VW race engines would do that in the catch can as well, between the months of October to February.

FYI, late model Hemi's have higher positive crankcase pressures than other pushrod V8's, and as such actually burn more oil than lets say a LS3 Chevy.
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  #18  
Old 12-17-2010, 06:32 AM
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Just be glad that is not going back in your engine. Looks like the can is doing the job it was designed to do. It is condensation from the weather. You will see some of the same color in your oil pan the next morning if you leave your drained oil outside in a metal catch pan like I have done and that coloring is around the edges of the pan from the condensation. I think you are fine - just keep an eye on it and check your can each week. Wish I could put a catch can on my 2007.
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  #19  
Old 12-17-2010, 08:04 AM
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One more mod going to my list after seeing what DID NOT end up back in your engine!
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  #20  
Old 12-17-2010, 12:15 PM
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Where does this catch can get perchased from, and is it easy to mount. Thanks
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