hail naw 
Catch can drain back to oil pan Do or Don't??
Catch can drain back to oil pan Do or Don't?? Is there any reason I shouldn't run a drain back into my oil pan from the catch can. LSx 427 / Large frame T-6 turbo. First hand answers please, Thanks! [IMG]
[/IMG]
[/IMG] The whole idea of a catch can or crankcase evac system is to pull/collect vapors from your engine, vapors include condensation thats accumulates just like the morning dew accumulates on your window. So draining it back into the pan would undo what you wanted it to do to begin with. When my car runs E85 I can dump out almost a quart of water in a month.
Trending Topics
The whole idea of a catch can or crankcase evac system is to pull/collect vapors from your engine, vapors include condensation thats accumulates just like the morning dew accumulates on your window. So draining it back into the pan would undo what you wanted it to do to begin with. When my car runs E85 I can dump out almost a quart of water in a month.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Its would be easier for you to run no catch can then. You are defeating the purpose. On a side note, how necessary are catch cans? On my turbo car im sure oil temps are over 212. So wouldn't the water boil away? I have never run one,boosted for 4 years now and no issues. I just run open breathers
Its would be easier for you to run no catch can then. You are defeating the purpose. On a side note, how necessary are catch cans? On my turbo car im sure oil temps are over 212. So wouldn't the water boil away? I have never run one,boosted for 4 years now and no issues. I just run open breathers
TECH Resident
Joined: Nov 2011
Posts: 916
Likes: 5
From: Las Vegas, NV
This is what a typical catch can will capture. About 80% water (on the bottom), 20% oil. Depends on how much oil gets blown out of the line, but for the most part, the catch can is condensing the steam and combustion blow-by that gets past the rings and could contaminate the oil. Imagine pouring this back into your motor oil (i.e. drainback).
Not healthy for the motor oil/engine.
Not healthy for the motor oil/engine.
Last edited by HRHohio; Jul 18, 2013 at 12:06 PM. Reason: Corrected typo - Rings -> oil
TECH Resident
Joined: Dec 2004
Posts: 905
Likes: 0
This is what a typical catch can will capture. About 80% water (on the bottom), 20% oil. Depends on how much oil gets blown out of the line, but for the most part, the catch can is condensing the steam and combustion blow-by that gets past the rings and could contaminate the rings. Imagine pouring this back into your motor oil (i.e. drainback).
Not healthy for the motor oil/engine.
http://redlinemotorworks.files.wordp...oil-closer.jpg
Not healthy for the motor oil/engine.
http://redlinemotorworks.files.wordp...oil-closer.jpg
9 Second Club
Joined: Nov 2003
Posts: 13,616
Likes: 185
From: Norn Iron
Been running mine like that for a few years with no issues.
The can itself does gather a lot of mayo, but it's certainly never caused any problems and is more down to the can being remotely mounted and being cooler than the engine itself actually causes the condensation to form.
The can itself does gather a lot of mayo, but it's certainly never caused any problems and is more down to the can being remotely mounted and being cooler than the engine itself actually causes the condensation to form.
The benefit of crankcase ventilation is to prevent the inside of an engine from becoming the pressurized and propagating leaks.
Positive crankcase ventilation induces a controlled flow pattern of: in through the breather and out into the intake tract. The benefits of this are preventing oil mess at the breather and to prevent emissions into the atmosphere.
The benefit of the catch can is to stop engine oil picked up in the positive crankcase ventilation from entering the intake tract. Engine oil in the intake tract leads to: fuel mixture contamination as well as valve and combustion chamber deposits that can cause reduced flow, and pre-ignition.
Positive crankcase ventilation induces a controlled flow pattern of: in through the breather and out into the intake tract. The benefits of this are preventing oil mess at the breather and to prevent emissions into the atmosphere.
The benefit of the catch can is to stop engine oil picked up in the positive crankcase ventilation from entering the intake tract. Engine oil in the intake tract leads to: fuel mixture contamination as well as valve and combustion chamber deposits that can cause reduced flow, and pre-ignition.
