Toymods Car Club Inc: Tech & Conversions => oil catch can and oil breather tank

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Location:
Sydney
Registered:
September 2003

oil catch can and oil breather tank	Sat, 03 April 2004 11:38

ok, what is the difference and the function of each? For my 3SGTE I have an oil catch can, oil breather tank, remote oil filter kit, front mount oil cooler and thats about it. In what order are these setup? ie. From the adaptor plate on the block, the line goes to the remote oil filter, then to oil cooler, then back to adaptor plate?? then, breather on top of rocker cover, hose to breather tank or catch can?? All help would be greatly appreciated. thanks again [Report message to a moderator]

Location:
Perth
Registered:
May 2003

Re: oil catch can and oil breather tank	Sat, 03 April 2004 12:14

The order of the oil pressure system is right. From pump (internal to motor) -> external oil filter -> oil cooler -> adapter plate. The oil breather tank (the one with the filter on) is where fresh air is drawn in through. Normally fresh air is drawn in via a tapping in the intake tract just after the air cleaner. The breather tank replaces this. Hence the line from the rocker cover (previously to the intake tract) now comes from the little breather tank with the filter. The oil/air separator tank (catch can) is connected in series with the original PCV (positive crankcase ventilation) system before the point where the PCV valve connects to the intake manifold. The idea is that the catch can separates any oil vapour from the air being sucked into the engine. (The oil vapour normally reduces the octane rating of the air/fuel mix.) The inlet to the oil/air separater from the crankcase goes into the lower pipe on the tank and the cleaned air is drawn out of the top pipe of the tank into the inlet manifold. The oil/air separater should also have a little drain tap at the bottom that needs to be periodically drained to release any built up oil. Hope this helps. [Updated on: Sat, 03 April 2004 12:16] [Report message to a moderator]

Location:
Sydney
Registered:
September 2003

Re: oil catch can and oil breather tank	Sat, 03 April 2004 12:51

thanks heaps mate. by the way, did you happen to buy that breather tank today on ebay? that looks the goods and I am going to get one as well. thanks again [Report message to a moderator]

Location:
Perth
Registered:
May 2003

Re: oil catch can and oil breather tank	Sat, 03 April 2004 16:37

Yep, that was me. Slowly collecting bits up for my project. They look pretty trick. Now just need the oil/air separator. [Report message to a moderator]

Location:
Sydney
Registered:
September 2003

Re: oil catch can and oil breather tank	Sat, 03 April 2004 22:41

ok, which one is the oil air seperator? is that the catch can?? if not, where does it fit in?? [Report message to a moderator]

Location:
Perth
Registered:
May 2003

Re: oil catch can and oil breather tank	Sun, 04 April 2004 12:27

The oil/air separator is the one usually referred to as the catch can as it 'catchs' the oil vapour in the air from the crankcase before being sucked into the engine. The catch can should be sealed unit (i.e. no filter on it venting to atmosphere). Usually an oil/air separator has two pipes, one inlet (the lower on the can) and one outlet (the higher on the can). The internals of good a catch can are divided into two main sections, a small air cavity at the top separated by a perforated plate from the bottom section. The bottom section is filled with a gauze (eg very fine stainless steel wool) that helps to separate the oil vapour from the air. The pipe from the crankcase enters into the gauze filled area. The pipe back to inlet pulls air from the small cavity in the top of the catch can. There is also a drain cock on the bottom of the can to drain built up oil. There are other catch cans about that dont have the two chambers and are simply made up of a small cylinder. There are also some on EBAY with a little level thingy on the side to show how much oil is in the catch can. Here are some nice articles for your reading pleasure: http://www.autospeed.com.au/cms/search/index.html? scope=&keywords=oil%2Fair+separator On Autospeed they actually distinguish between an oil/air separator and a catch can. I guess everyone's opinions are different. [Report message to a moderator]

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