Pcv oil catch can to eliminate carbon buid-up in intake
05-12-20, 11:03 AM
#1
Lexus Champion
Thread Starter
Pcv oil catch can to eliminate carbon buid-up in intake
Numerous posts in this forum and others concerning build-up in and around the throttle body plate, intake manifold tracts and intake valves.
But what is causing such deposits in a dry intake manifold?
Answer: PCV blow-by vapors are causing hard deposits to develop over time.
One solution is to use an oil catch can in series with the PCV valve as a catchment of oily film to prevent build-up in the first place.
Before presenting the project more fully, am seeking comment from anyone who has installed a PCV Oil Catch Can.
Thank you.
But what is causing such deposits in a dry intake manifold?
Answer: PCV blow-by vapors are causing hard deposits to develop over time.
One solution is to use an oil catch can in series with the PCV valve as a catchment of oily film to prevent build-up in the first place.
Before presenting the project more fully, am seeking comment from anyone who has installed a PCV Oil Catch Can.
Thank you.
Last edited by YODAONE; 05-12-20 at 11:34 AM.
05-12-20, 11:06 AM
#2
Lexus Champion
They work great in all the cars I've installed them in, usually becomes very needed when you turbo or super a car since while stock most don't have all that much of an issue once you have FI it does become a problem. If you have an NA engine you redline a lot/push very hard it also helps, anything with low tension oil rings also benefits from them since those engines are not great in terms of oil control
05-12-20, 11:45 AM
#3
having a catch can for the 1st gen IS250s were essential since they are direct injected, versus port & direct injection on the 350s.
this kept the intake valves from collecting oil/carbon deposits where fuel would normally "wash" them with port injection.
this is likely why that direct injection engine has been discontinued by toyota.
with the 1UZ being port injected, intake valve carbon build up is unlikely but the intake is still susceptible so yes a PCV catch can can be beneficial.
it will likely not collect as much oil as turbo applications mentioned, unless you are constantly revving in the high RPM range.
this kept the intake valves from collecting oil/carbon deposits where fuel would normally "wash" them with port injection.
this is likely why that direct injection engine has been discontinued by toyota.
with the 1UZ being port injected, intake valve carbon build up is unlikely but the intake is still susceptible so yes a PCV catch can can be beneficial.
it will likely not collect as much oil as turbo applications mentioned, unless you are constantly revving in the high RPM range.
05-12-20, 12:23 PM
#4
Lexus Champion
Thread Starter
having a catch can for the 1st gen IS250s were essential since they are direct injected, versus port & direct injection on the 350s.
this kept the intake valves from collecting oil/carbon deposits where fuel would normally "wash" them with port injection.
this is likely why that direct injection engine has been discontinued by toyota.
with the 1UZ being port injected, intake valve carbon build up is unlikely but the intake is still susceptible so yes a PCV catch can can be beneficial.
it will likely not collect as much oil as turbo applications mentioned, unless you are constantly revving in the high RPM range.
this kept the intake valves from collecting oil/carbon deposits where fuel would normally "wash" them with port injection.
this is likely why that direct injection engine has been discontinued by toyota.
with the 1UZ being port injected, intake valve carbon build up is unlikely but the intake is still susceptible so yes a PCV catch can can be beneficial.
it will likely not collect as much oil as turbo applications mentioned, unless you are constantly revving in the high RPM range.
On port injection engines such as 1UZ-FE, 2UZ-FE and 3UZ-FE, issues observed and reported are oily/carbon deposits on throttle body, intake runners, intake valves and injector air enrichment ports (1998-2000 LS400)
Of course the catchment must periodically be emptied, which, aside from cost, or perhaps a perception that it is a band-aid for an engine design flaw, may explain why OEM's elected not install them.
Some are challenged to check tire pressure or change their engine oil, let alone an oil catchment.
Last edited by YODAONE; 05-12-20 at 12:27 PM.
05-12-20, 03:30 PM
#7
Lexus Champion
Build-up on the intake valves on direct injection engines is a real problem.
On port injection engines such as 1UZ-FE, 2UZ-FE and 3UZ-FE, issues observed and reported are oily/carbon deposits on throttle body, intake runners, intake valves and injector air enrichment ports (1998-2000 LS400)
Of course the catchment must periodically be emptied, which, aside from cost, or perhaps a perception that it is a band-aid for an engine design flaw, may explain why OEM's elected not install them.
Some are challenged to check tire pressure or change their engine oil, let alone an oil catchment.
On port injection engines such as 1UZ-FE, 2UZ-FE and 3UZ-FE, issues observed and reported are oily/carbon deposits on throttle body, intake runners, intake valves and injector air enrichment ports (1998-2000 LS400)
Of course the catchment must periodically be emptied, which, aside from cost, or perhaps a perception that it is a band-aid for an engine design flaw, may explain why OEM's elected not install them.
Some are challenged to check tire pressure or change their engine oil, let alone an oil catchment.
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