Questions on the several "right" & many "wrong" ways to run a Honda Catch can
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Questions on the several "right" & many "wrong" ways to run a Honda Catch can
Hello, I am looking to put a catch can on my B20B as part of the new turbo set up. I can't find good answers on the proper way to do it.
Are the hoses supposed to run out of the rear of the valve cover, facing rear of car? Or on the front side? I read the rear side was correct but I seem to see everyone doing it differently.
Also, do you need to remove the baffling cover that is riveted down? Again I seem to get conflicting reports on this...
I am trying to decide if I want to tackle this on my own, or try to get some professional help.
If I don't need to mess with the baffles it seems easy enough to put ports on the side of the valve cover and run the hoses. But I also want it done correctly so I am really getting the proper benefit!
I truly have tried to do a lot of searching but so many conflicting reports!! If there is a thread I missed please direct me and ill read more there. Thank you for any help you can give!
Are the hoses supposed to run out of the rear of the valve cover, facing rear of car? Or on the front side? I read the rear side was correct but I seem to see everyone doing it differently.
Also, do you need to remove the baffling cover that is riveted down? Again I seem to get conflicting reports on this...
I am trying to decide if I want to tackle this on my own, or try to get some professional help.
If I don't need to mess with the baffles it seems easy enough to put ports on the side of the valve cover and run the hoses. But I also want it done correctly so I am really getting the proper benefit!
I truly have tried to do a lot of searching but so many conflicting reports!! If there is a thread I missed please direct me and ill read more there. Thank you for any help you can give!
#2
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re: Questions on the several "right" & many "wrong" ways to run a Honda Catch can
You can tap either side of the valve cover (front or rear). On B series (at least the VTEC heads/covers) there's an OEM baffle in place in the front which can help the lines/can from getting a tonne of oil thrown through it, but again both the front and backside can work.
No, leave the baffle cover.
Assuming you can weld the bungs into the aluminum, it's something you can do on your own. Otherwise most shops only charge like $30-$50 to weld them in for you.
Getting off forums for now but let us know if you have other questions.
No, leave the baffle cover.
Assuming you can weld the bungs into the aluminum, it's something you can do on your own. Otherwise most shops only charge like $30-$50 to weld them in for you.
Getting off forums for now but let us know if you have other questions.
#3
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re: Questions on the several "right" & many "wrong" ways to run a Honda Catch can
Can go anywhere just make sure they are fully baffled. Some of the OEM baffles leave about 1/8" gap at the side of the cover, and if your bung is right there it will get a ton of oil pushed through. You can either fill the gap or extend the bung with a piece of tube so that the entry is above the OEM baffle.
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re: Questions on the several "right" & many "wrong" ways to run a Honda Catch can
Thank you for the help I appreciate it! Just needed a little clarification and this does seem easy enough. I have a good shop close by that can weld the bungs on for me.
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re: Questions on the several "right" & many "wrong" ways to run a Honda Catch can
Tag that first before finding a welder. As usual, there's more than one way
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re: Questions on the several "right" & many "wrong" ways to run a Honda Catch can
Thank you for the heads up, but when I click on the articles in the sticky it doesn't find the pages for some reason. I tried all four of the articles. It might be my work computer being dumb so i'll try and check them out again later at home.
#7
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re: Questions on the several "right" & many "wrong" ways to run a Honda Catch can
And the best way to greatly limit the amount of oil that gets sloshed into your fittings on the valve cover (in addition to making sure they're behind a baffle) is to weld them onto the top of the valve cover.
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#8
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re: Questions on the several "right" & many "wrong" ways to run a Honda Catch can
Is this being serious? I think that many of us might have hood clearance issues with a -10 bung and fitting sticking out the top....
#11
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re: Questions on the several "right" & many "wrong" ways to run a Honda Catch can
#12
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re: Questions on the several "right" & many "wrong" ways to run a Honda Catch can
The fitting does not need to be a straight fitting. They make 90 degree fittings. But then it's been a long time since I eyeballed the clearance between a B series valve cover and the bottom of a Civic hood. There'd be more room above the intake cam than the exhaust cam though.
#13
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re: Questions on the several "right" & many "wrong" ways to run a Honda Catch can
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#17
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re: Questions on the several "right" & many "wrong" ways to run a Honda Catch can
I like my kit I got from projectimport.com they sell a nice full bolt on complete catch can kit for the B series with no modification needed. It works great on my Supercharged Integra. My AFR is perfect now with this catch can kit there's no more oil diluting my AFR!
https://www.projectimport.com/store/...-lok-fittings/
https://www.projectimport.com/store/...-lok-fittings/
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re: Questions on the several "right" & many "wrong" ways to run a Honda Catch can
I like my kit I got from projectimport.com they sell a nice full bolt on complete catch can kit for the B series with no modification needed. It works great on my Supercharged Integra. My AFR is perfect now with this catch can kit there's no more oil diluting my AFR!
https://www.projectimport.com/store/...-lok-fittings/
https://www.projectimport.com/store/...-lok-fittings/
#19
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re: Questions on the several "right" & many "wrong" ways to run a Honda Catch can
Kit comes with everything needed minus the labor of welding, obviously.
Edit: Random note of caution - If you vent via the exhaust side of the engine, make sure you use steel lines and not nylon as the nylon can eventually get a hole burned in it if you're using a turbo setup that places the exhaust housing or manifold super close to the nylon. Then you're leaking oil and gas fumes/droplets onto your turbo blanket or exhaust wrap if you have it, which is a fire hazard. Ask me how I found that out...
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Re: Questions on the several "right" & many "wrong" ways to run a Honda Catch can
Last edited by TheShodan; 09-25-2018 at 07:51 AM.
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Re: Questions on the several "right" & many "wrong" ways to run a Honda Catch can
#23
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Re: Questions on the several "right" & many "wrong" ways to run a Honda Catch can
I still need to research a lot more for sure. But from what I've seen its not ideal to have the oil drain back because it will have some fuel mixture and is not exactly "clean" oil. Due to this I believe is it better to not have a drain back and add new oil as needed if the catch can is filling up at all.
#24
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Re: Questions on the several "right" & many "wrong" ways to run a Honda Catch can
That will happen regardless, a drain back is good because in the end who wants to disconnect their vent lines, drain oil and then fill more up. If that was the case I would have to do that every pass. For 99% of cars I think two vent lines from the back of the valve cover to a vented canister with either 1 or two drain lines back to the back of the block is all that is needed.
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Re: Questions on the several "right" & many "wrong" ways to run a Honda Catch can