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Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars |
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#1 |
Zilvia Junkie
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Haz anyone installed Oil Catch Can on KA?
During a drift event.....After several runs it started to make knocking sound for a bit then it stopped... then in the morning it'll start knocking again only when i start the car. I think it's prolly my engine oil being sloshed around. Now searched and it seemed that people with SR and RB install catch cans. Has anyone had the same problem as me?
Kazama Auto S14 240SX Cross Flow Oil Catch Tank ![]() Last edited by T_wei; 08-19-2009 at 04:06 PM.. |
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#3 |
Post Whore!
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knock? as in a loud audiable knock like when ever you rev the engine it gets louder and faster?
If so the you have spun a bearing
__________________
1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit |
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#4 |
Man w/ CTSV & a Car Seat
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And an oil catch can will fix your problem how? Do you even understand the reason/need for having an oil catch can? It does just that, catches oil. Used primarily for boosted cars that have blow by from the crank case. Helps keep oil from getting into the intake tracts for SRs.
Since you're NA, doubt you're getting blow by for you to need this. If are getting so much blow by that you need an oil catch can, I'd be surprised that the car is even running. You said you're knocking...does it sound like from the bottom or the top of the engine. If its rod knock, time for you to start looking for another engine... |
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#5 |
Zilvia FREAK!
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Catch can is to prevent oil/fuel vapors from getting back into the intake by the use of a steel mesh to capture an atomized fuel mist. It does nothing to affect performance on a stock engine, only to capture blow by from most high performance NA/FI applications.
The only way its benificial is when you can install a second 3/8ths fitting and place 2x OE PCV valves in the can -along with another 3/8ths npt port to directly go to the block, and keep the OEM Valve cover restrictor to increase vaccuum. Now a clogged PCV valve coulve caused your engine knocking because there was no negative pressure in the crankcase to evacuate the mistified fuel vapors - thus washing the walls of the crank and cylinders, thinning your oil out over time enough to provide almost no lubrication properties. Even though the FSM claims the pressure will be vented from the valve cover durring high loads, the fuel vapors still cling to what evers in the way, enough unburnt fuel and your essentially diluting your oil, and anything but amsoil will directly fail. It coulve also blow out any kind of RTV or seal/gasket, causing your engine to never be in a vaccuum state inside the crankcase, thus rendering the PCV system uneffective. Send in your oil samples to blackstone for a OA, they will tell you your fuel dilution % for you to compare at BITOG. Take off your valve cover intake hose, blow into it and see if there is pressure build up - you need a completely sealed engine, thats why there is a vacuum restrictor on all nissan engines KA is in the intake - valve cover hose |
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#6 | |
Zilvia Junkie
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Age: 36
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Quote:
ah i see i see, some guy at the event i thought was pretty knowledgeable strolled over and told me ya sounds like your oil was being sloshed around may need a catch can..... |
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#8 |
Zilvia Junkie
![]() Join Date: May 2007
Location: Socal 626
Age: 36
Posts: 304
Trader Rating: (3)
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well okay let me make it more clear... After several runs it started to make knocking sound for a bit then it stopped... then in the morning it'll start knocking again only when i start the car.
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#9 | |
Post Whore!
![]() Join Date: Dec 2006
Location: Misawa, Japan
Posts: 6,815
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Quote:
knock or a tick? as in a loud audiable knock like when ever you rev the engine it gets louder and faster?
__________________
1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit |
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#10 |
Bandwagon.
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dude,
record the sound and post it. |
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#16 |
Post Whore!
![]() Join Date: Dec 2006
Location: Misawa, Japan
Posts: 6,815
Trader Rating: (8)
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__________________
1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit |
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