COMPATIBILITY
OVERVIEW
The catch can draws out oil and water condensation from the crankcase gasses that would otherwise be drawn into the intake manifold. This prevents oil buildup in the intake, intercooler system walls, throttle body, and intake manifold. This effectively raises the octane, can increase engine performance from cleaner inlet air, and can lower hydrocarbon emissions. The closed system prevents unwanted oil vapors from entering into the cabin. Catch can kits include everything needed for a complete installation.
FLUID LOCK® CATCH CANS
In 2022, Radium Engineering implemented a revolutionary design change to the 7 fluid ounce standard catch can. An inherent problem always existed with typical catch cans when not serviced regularly. The fluid contaminants will eventually leave the reservoir pouring into the air intake system causing poor engine performance. To resolve this issue, Radium created the Fluid Lock® Catch Can. This contains a patented mechanism that prevents the reservoir from overfilling and traps the collected fluids until it is emptied.
FEATURES
- Direct fitment with no drilling required
- Large 10AN ORB inlet and outlet ports
- 4AN ORB drain port
- 2-step oil separation baffling
- O-ring sealed dipstick
- 7 fluid ounce capacity
- Patented Fluid Lock® system
COLLECTION & EMPTYING
The rate that your catch cans will collect oil and moisture contaminants will vary from one individual vehicle to the next, so there is no set emptying interval. PCV catch cans tend to collect more than CCV catch cans. You should check the level of your catch can using the integrated dipstick starting at 3-4 weeks of driving and repeat as needed to determine how often they should be emptied based on what you see.
Catch cans can be emptied by unscrewing the lower reservoir and removing it from the vehicle to dump out, or in cases where there is available space under the catch can, the Petcock Drain Kit can be installed and used to drain them.
In cases where oil collection is excessive you may have to address an issue with the engine. The reasons a catch can will collect an excess of oil include
- Excessive blowby from engine damage
- Crankcase windage from an over-full oil level
- Poor placement of breather ports and/or poor baffling inside breather ports
- PCV valve not closing and leaking under heavy load
20-0387-FL Dual Catch Can Kit, MK4 Supra, Fluid Lock
These catch cans vent-to-engine permitting a true PCV system. The 2 catch cans function completely independent of each other and do NOT vent-to-atmosphere (VTA), thus are emissions and track legal. Closed loop systems remove the oil and sludge from the PCV gasses before it is routed to the engine to be burned. A closed loop system also promotes negative crankcase pressure for optimal performance. Furthermore, closed systems prevent unwanted oil vapors from entering the cabin.
As shown above, one catch can plumbs inline with the PCV (positive crankcase ventilation) valve and retains it's factory function. When the intake manifold pressure is close to or greater than atmospheric pressure, the PCV "check" valve closes and, thus, this hose experiences no flow. Conversely, the PCV hose will experience "metered" vacuum when the engine is idling, steady state cruising, and decelerating. This would normally draw unwanted crankcase vapor, unspent fuel, and oil sludge into the intake manifold immediately after a high load run. Note: Because the Radium catch cans are pressure sealed, they are great for this boosted application so intake manifold connection is permitted. The hose and fittings for the PCV catch can are -6AN.
The other catch can plumbs inline with the CCV (crankcase vent) port experiences atmospheric pressure at low loads. But when the engine is at high load (WOT), this hose will experience blow-by flow from the crankcase. This would normally lead to oil and sludge accumulation in the air filter intake pipe. Oil accumulation will occur in the intercooler which lowers the thermal efficiency properties of the heat exchanger and leads to decreased performance. The hose and fittings for the CCV catch can are -8AN.
Because of the many OEM component variations for this chassis, 3 different brackets are included for optimal mounting. These multiple locations provide a solution for all RHD and LHD vehicles including those using a large single turbo, the stock twin turbos, the updated brake master cylinder, and even early models that have rear brake TRAC. All brackets use factory holes and integrate perfectly with the surrounding components. No cutting, drilling or permanent modification to the vehicle is required.
NOTE: This catch can kit is NOT compatible with Radium Engineering 2JZ press-in valve cover fittings. The press-in fittings are 10AN and it deletes the PCV valve so it can no longer be plumbed to the intake manifold. These catch can kits are designed for the stock 8AN and 6AN hose sizes. If you would like to use the the press-in fittings, we recommend using a universal VTA Competition Catch Can with dual inlets, or using universal dual catch cans and adding a second hose connection to the air filter inlet pipe for a second crankcase breather.
Includes
- Oil catch can with integrated condenser and dipstick (x2)
- Supra specific aluminum mounting brackets (x3)
- AN adapter fittings and hose ends
- Enough hose for custom applications
- Stainless steel mounting hardware
