About a tank of gas later my oil catch can.... - Page 5 - ZR-1 Net Registry Forums

Karl · 05-19-2019

Quote:

Originally Posted by XfireZ51

Karl,

I have the exact same one (except its polished aluminum) and its installed in the front left of the car, where the AIR system was located. Do u have any steel wool in there, or are u simply using gravity to have oil drop out of suspension?

I am using a combination of steel wool tucked under home Depot aluminum gutter guard. I use the gutter guard to keep the steel wool packed in.

I also made the inlet line about 2 inches longer and it points to the catch can wall...if that makes any sense.

Karl · 05-19-2019

This is the gutter guard I use.

https://www.lowes.com/pd/amerimax-al...yABEgLA2PD_BwE

XfireZ51 · 05-19-2019

Quote:

Originally Posted by Karl

This is the gutter guard I use.

https://www.lowes.com/pd/amerimax-al...yABEgLA2PD_BwE

Ok, that looks like something I could do. My catchcan is attached to the frame rail by the horn assembly. Its tipped at about a 40* angle so the headlamp buckets can rotate freely. Have been using it for a number of years now, and the plenum still gets oil in it altho never as much as previously. As I said, I am using it as an air oil separator. Do u think that since I have no steel wool in there, that oil may still be getting sucked into plenum?

Karl · 05-19-2019

Odds are probably yes there is still oil getting past the catch can. It is just a hollow shell. And with all the air and turbulence the oil needs to be separated some how.

My '92 had the catch can mounted under the driver headlight but decided to move it low after doing some homework.

I will be at Marc's BBQ this upcoming weekend so you can see the car there and chat more about it.

Karl · 05-19-2019

See post #21 for the modified catch can inlet

http://zr1.net/forum/showthread.php?t=29346&page=3

Ccmano · 05-19-2019

Haibecks theory is that very little oil comes from the PCV system into the plenum. This is what he thinks is going on.

“I noticed that the inside of the plenum was always soaked with oil. In fact several drops of oil can usually be poured out of a typical LT5 plenum when it is removed from the engine for service. I tried to reduce the oil consumption by installing a two gallon accumulator tank with a coalescing filter on the vacuum line where the PCV tube connects to the plenum. The accumulator would collect only about 10% of the oil that the engine lost. I believe that this proves that the oil loss problem is not through the PCV system. If oil catch cans are installed on the crankcase vent tubes that connect to the air horn, they do not collect oil. I believe that the oil gets past the piston rings and moves up the intake air ports via reversion. My theory is that the rings loose control of the oil through some combination of poor cylinder bore geometry and piston ring flutter.”

I tend to agree. My catch can only picked up a couple ounces in the last 1000 miles and yet when I pulled the plenum to change injectors recently there was oil in the plenum.
H

Karl · 05-19-2019

Gravity is your friend. I believe Tony D from Alabama inspired me with his catch can installation.

Karl · 05-19-2019

Here is the video with the captured contents. It should be about 3x what's in there since I spilled most of it on the garage floor.

https://youtu.be/4jeGoitdqcU

05-19-2019	#42
Karl Join Date: May 2013 Location: Chicago Posts: 978	Re: About a tank of gas later my oil catch can.... This is the gutter guard I use. https://www.lowes.com/pd/amerimax-al...yABEgLA2PD_BwE __________________ 1993 ZR-1 #211 Yellow On Beige Beast #2 1992 ZR-1 #427 Black On Black Sold 1985 L98 Blue On Blue Sold

05-19-2019	#44
Karl Join Date: May 2013 Location: Chicago Posts: 978	Re: About a tank of gas later my oil catch can.... Odds are probably yes there is still oil getting past the catch can. It is just a hollow shell. And with all the air and turbulence the oil needs to be separated some how. My '92 had the catch can mounted under the driver headlight but decided to move it low after doing some homework. I will be at Marc's BBQ this upcoming weekend so you can see the car there and chat more about it. __________________ 1993 ZR-1 #211 Yellow On Beige Beast #2 1992 ZR-1 #427 Black On Black Sold 1985 L98 Blue On Blue Sold

05-19-2019	#45
Karl Join Date: May 2013 Location: Chicago Posts: 978	Re: About a tank of gas later my oil catch can.... See post #21 for the modified catch can inlet http://zr1.net/forum/showthread.php?t=29346&page=3 __________________ 1993 ZR-1 #211 Yellow On Beige Beast #2 1992 ZR-1 #427 Black On Black Sold 1985 L98 Blue On Blue Sold

05-19-2019	#46
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: About a tank of gas later my oil catch can.... Haibecks theory is that very little oil comes from the PCV system into the plenum. This is what he thinks is going on. “I noticed that the inside of the plenum was always soaked with oil. In fact several drops of oil can usually be poured out of a typical LT5 plenum when it is removed from the engine for service. I tried to reduce the oil consumption by installing a two gallon accumulator tank with a coalescing filter on the vacuum line where the PCV tube connects to the plenum. The accumulator would collect only about 10% of the oil that the engine lost. I believe that this proves that the oil loss problem is not through the PCV system. If oil catch cans are installed on the crankcase vent tubes that connect to the air horn, they do not collect oil. I believe that the oil gets past the piston rings and moves up the intake air ports via reversion. My theory is that the rings loose control of the oil through some combination of poor cylinder bore geometry and piston ring flutter.” I tend to agree. My catch can only picked up a couple ounces in the last 1000 miles and yet when I pulled the plenum to change injectors recently there was oil in the plenum. H __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold.

05-19-2019	#47
Karl Join Date: May 2013 Location: Chicago Posts: 978	Re: About a tank of gas later my oil catch can.... Gravity is your friend. I believe Tony D from Alabama inspired me with his catch can installation. __________________ 1993 ZR-1 #211 Yellow On Beige Beast #2 1992 ZR-1 #427 Black On Black Sold 1985 L98 Blue On Blue Sold