zumbooruk
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- 2025 FL5, 2014 Chevy Suburban (wife), previous 2007 FA5
sorry, did not want my original post to be too long, so I just summarized my researchwhat links?
here are some links with a summary of each
note that it seems that I cannot post links to the "face" site nor to the "read it" site
https://www.civicxi.com/forum/threads/the-fl5-track-junkie-thread.52760/page-82
CCV catch can spiked crankcase pressure, leading to oil ejection from turbo seals on decel with visible smoke clouds. Recommends venting or larger lines to mitigate.
TheFace /groups/typerownersofficial/posts/10165335923225744/
Type R Owners group thread on PCV vs. CCV cans for FL5. Multiple users report exhaust smoke after Radium dual kit install, attributed to over-restriction on CCV side and shop confirmed it pushes oil to turbo/exhaust.
TheFace /groups/typerownersofficial/posts/10164685263880744/
Radium CCV catch can was deemed too restrictive, causing blow-by and positive crankcase pressure that forces oil past turbo seals into exhaust.
ReadIt /r/WRX/comments/170m8qp/radium_dual_catch_can_install_a_lot_smoke_at_idle/
WRX owner (similar turbo/PCV setup) describes heavy white/blue smoke at idle post-Radium dual install. Comments point to loose fittings or improper venting creating backpressure, fixed by rechecking hoses. this is similar to the FL5 symptoms.
ReadIt /r/wrx_vb/comments/15mrrrz/ccv_vs_pcv_catchcan/
Thread on CCV vs PCV cans. Warns that a restrictive CCV routing sends oil to turbo inlet, reducing efficiency and causing exhaust smoke from bearing contamination.
ReadIt /r/wrx_vb/comments/1bhvfct/evidence_catch_cansaoss_are_needed_on_these_cars/
Detailed WRX analysis showing oil from crankcase entering turbo via restricted paths, leading to intercooler fouling and blue exhaust smoke
ReadIt /r/wrx_vb/comments/1ob7tp9/2024_wrx_burning_1l_per_3500km_dealership_will_be/
2024 WRX owner burning oil post-mods installs Radium dual cans to address. Reports initial smoke reduction but notes ongoing monitoring for CCV pressure pushing residue to exhaust.
https://www.bimmerforums.com/forum/...-oil-after-Radium-Catch-can-PCV-valve-install
BMW M54 thread (turbo-adjacent blow-by issues) details big blue smoke puffs on throttle from idle after Radium PCV can install. The cause was restricted flow leading to oil pushing past seals. It was resolved by larger hoses and check valve tweaks.
https://www.supramkv.com/threads/address-blow-by-oil-ccv-or-pcv-catch-can.33616/
Supra MKV forum on CCV/PCV cans: Blocking/restricting CCV line caused immediate exhaust smoke from oil blow-by. Users recommend non-restrictive routing to avoid turbo bearing contamination. again similar to FL5.
https://blog.edgeautosport.com/review-radium-engineering-fk8-civic-type-r-catch-cans
FK8/FL5 Radium review. Notes oil vapors slip through if pressure builds. Emphases proper install, with tips on monitoring for exhaust residue.
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