Description

COMPATIBILITY

Universal for all engine types.
Compatible engines must have a breather port high enough on the crankcase to not draw oil into the AOS-R, but low enough to connect to the bottom inlet/outlet on the AOS-R and allow a downhill oriented hose so that oil will drain back through that breather hose.

OVERVIEW

A high powered modified engine tends to generate excessive blow-by oil and gasses. In these cases, an ordinary small catch can may quickly fill with oil and not be adequate. Like the Radium Engineering Catch Cans, the AOS-R (Air Oil Separator, Return) is responsible for keeping blow-by oil and other pollutants out of the air intake, intercooler, manifold, etc. The main difference is that an AOS-R system returns oil back into the pan above the oil level. This permits a service-free system.

Without a properly designed air oil separator, water condensation can develop and find its way in the oil pan contaminating engine oil. Engine coolant lines are routed through the Radium Engineering AOS-R via the 2 barbed fittings. The coolant enters a specially designed heating chamber.

This keeps the AOS-R warm and prevents internal water condensation. Because water is more dense than oil, there is an integrated water trap found around the bottom perimeter that prevents condensation from descending into the oil pan. With a properly operating system, the fluid level inside the AOS-R will be empty after sitting. If there is a possible return obstruction, simply unscrew the AOS-R dipstick for inspection. Conversely, the entire billet unit disassembles into 3 large pieces for servicing.

The filtered liquid oil is collected at the bottom of the AOS-R and drawn into the oil pan. Meanwhile, the clean crankcase air can either vent-to-atmosphere (VTA) or vent-to-engine (VTE). Shown above is a plumbing example for the 20-0219 AOS-R, Universal VTE. All of the plumbing in the example above also applies to the 20-0819 AOS-R, Universal, VTA except for the yellow hose. This line is not required as the VTA unit vents-to-atmosphere through the top of the can.

20-0219 AOS-R, Universal, VTE

The vent-to-engine air-oil separator has a top (inlet) and side (outlet) port. The outlet port should be routed back into the intake or turbo inlet pipe. The VTE system is a must for mass-air flow (MAF) sensor engines. Furthermore, the VTE AOS-R will not expel an undesireable gas scent into the cabin. Lastly, the VTE system will prevent any potential oil debris from coating the engine bay.

BENEFITS

Lowers hydrocarbon emissions
Effectively raises the octane and increases engine performance with cleaner inlet air
Prevents oil buildup in the intake or intercooler system walls, throttle body, intake manifold, etc.

INCLUDED

Machined aluminum Radium Engineering AOS-R
Aluminum mount that permits 360 degree rotation
Two 5/16" barbed fittings for coolant lines
Stainless steel hardware

PORTS

Inlet Port: 7/8"-14 threaded for 10AN ORB fittings
Outlet Port: 7/8"-14 threaded for 10AN ORB fittings
Return/Inlet Port: 7/8"-14 threaded for 10AN ORB fittings
Coolant Ports: 7/16"-20 threaded, includes two 7mm (or 5/16") barb fittings

NOTE: CLICK HERE for a list of fittings compatible with the 10AN ORB ports.

MEASUREMENTS

AOS-R Height: 6.7" (without fittings)
AOS-R Diameter: 3.45" Round
AOS-R Capacity: 20.3 oz (600mL)

*If operated in freezing environments, Radium Engineering recommends installing insulation sleeving (not included) over any hose exposed to cold air flow. This will help prevent the natural phenomenon of water condensation freezing and potentially clogging the hose.

20-0819 AOS-R, Universal, VTA

The vent-to-atmosphere air-oil separator has 2 side (inlet) ports. This is great for dual bank engines that have 2 crankcase vent ports.

NOTE: For single crankcase vented engines, simply plug one of the inlet ports with Radium Engineering 14-0351. The VTA AOS-R features one giant non-restrictive outlet that is over 183% larger than the inner diameter of the 10AN inlets. This increase in volume slows air flow allowing contaminants to fall out of suspension. Additionally, contaminants are trapped with a diffuser permitting the oil sludge to fall back into the catch can preventing overspray in the engine bay. Furthermore, it is a dual stage design (located in the inlet and outlet). These free flowing chambers do not create any flow restriction.

NOTE: Because of the vented "air leak" in the system, the VTA AOS-R is not recommended for mass-air flow (MAF) sensor engines.

BENEFITS

Lowers hydrocarbon emissions
Effectively raises the octane and increases engine performance with cleaner inlet air
Prevents oil buildup in the intake or intercooler system walls, throttle body, intake manifold, etc.

INCLUDED

Machined aluminum Radium Engineering AOS-R
Aluminum mount that permits 360 degree rotation
Two 5/16" barbed fittings for coolant lines
Stainless steel hardware

PORTS

Inlet Port(s): 7/8"-14 threaded for 10AN ORB fittings
Vents to Atmosphere through slotted and baffled top
Return/Inlet Port: 7/8"-14 threaded for 10AN ORB fittings
Coolant Ports: 7/16"-20 threaded, includes two 7mm (or 5/16") barb fittings

NOTE: CLICK HERE for a list of fittings compatible with the 10AN ORB ports.

MEASUREMENTS

AOS-R Height: 6.7" (without fittings)
AOS-R Diameter: 3.45" Round
AOS-R Capacity: 20.3 oz (600mL)

20-1773 VTA TO VTE COMPETITION CATCH CAN ADAPTER, 10AN ORB PORTS

This VTE adapter is included in the newst CCCs. However, it can be used to convert the VTA AOS-R to a dual inlet VTE AOS-R.

IMPORTANT

In order for the AOS-R to function properly, a breather/return port on the engine must be available on the engine block that is high enough that oil will not be drawn into the AOS-R from the oil pan.
The AOS-R must be mounted high enough in the engine bay so that the port on the bottom is higher than the breather/return port on the engine.
For heating purposes, engine coolant must be routed to the AOS-R to prevent condensation.