05-04-2015 | #1 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,669
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Regarding Catch Cans
Earlier last week I happened to be looking at the catch can I installed last year. Underneath it I noticed what looked like an oily looking area. I reached under the can and felt an oil film that looked like it originated from one of the site tube fittings. So I removed the can from the car to use some plumbing tape to seal it. The can also has a bottom lid that screws into the can and I noticed it was not torqued. At this point I was pretty certain this may also be causing a vacuum
leak to the manifold. Although the motor idles well, I had noticed some slight surging at idle. More so when freewheeling while decelerating from speed. I made sure I sealed and tightened things down reinstalling the can. Actually my catch can is an oil separator and does not use any medium to trap the oil. Oil drops out of suspension as the air cools and oil collects at the bottom. Had 1-2 tablespoons of oil after 1500 miles. I can also tell there's less oil in exhaust because tips stay much cleaner and clean up much easier than before. Took car out yesterday to a C&C. I immediately noticed how much smoother the idle was and how much less the motor oscillated when freewheeling. The leak wasn't enough to be OBVIOUS but once tightened down, the difference was very noticeable.
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX Last edited by XfireZ51; 05-04-2015 at 04:48 PM. |
05-04-2015 | #2 |
Join Date: May 2013
Location: Chicago
Posts: 977
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Re: Regarding Catch Cans
Same thing happened to mine. The John Guest fittings began to leak so I plugged and sealed them up.
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1993 ZR-1 #211 Yellow On Beige Beast #2 1992 ZR-1 #427 Black On Black *Sold* 1985 L98 Blue On Blue *Sold* |
05-04-2015 | #3 |
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Re: Regarding Catch Cans
Hmmmmm....
Veddy Intorestink!
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry |
05-05-2015 | #4 |
Join Date: Aug 2013
Location: ridgecrest ca
Posts: 104
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Re: Regarding Catch Cans
what catch can do you guys use . I want to get one
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05-05-2015 | #5 |
Join Date: Aug 2009
Location: South Dakota/California
Posts: 3,788
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Re: Regarding Catch Cans
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05-06-2015 | #6 |
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Re: Regarding Catch Cans
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry |
05-06-2015 | #7 |
Join Date: Aug 2014
Location: Kansas City, MO
Posts: 838
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Re: Regarding Catch Cans
What benefit does a Catch Can provide? Seems like a lot of GM guys run one.
I have never seen a catch can on a 928 or 944 Turbo unless it was a very high HP build and they were trying to prevent all sources of pre-ignition.
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Looking for a ZR-1 1985 Yamaha RZ350-NOT STOCK 1971 Yamaha AT1-Middle of a restoration |
05-06-2015 | #8 | |
Join Date: Aug 2009
Location: South Dakota/California
Posts: 3,788
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Re: Regarding Catch Cans
Quote:
The Oil Catch Can minimizes the amount of oil burned by the engine. There are other ways that oil is burned (bad valve guides, bad rings) but with the Oil Catch Can oil is not burned through the PCV system.
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