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RossM96
Samba Member
Joined: September 25, 2017
Posts: 33
Location: San Diego
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 Posted: Sat Feb 17, 2018 2:52 pm Post subject: Oil Breather |
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Hi everyone, I’m installing Weber 40IDFs into my Type 4 engine today. What do I need to do with the oil breather box as far as connecting it, or not connecting it to my carbs. I bought them through aircooled.net so I was under the assumption that they were equipped with everything I need for install.
Thanks!
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rastomas
Samba Member
Joined: April 05, 2007
Posts: 258
Location: rosendale, ny
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| Posted: Sat Feb 17, 2018 3:19 pm Post subject: Re: Oil Breather |
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If the breather connects to ANYthing, it would be the charcoal filter cannister.
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busdaddy
Samba Member
Joined: February 12, 2004
Posts: 51152
Location: Surrey B.C. Canada, but thinking of Ukraine
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| Posted: Sat Feb 17, 2018 3:23 pm Post subject: Re: Oil Breather |
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HuH?, the charcoal canister is for gas tank fumes only, oil and water from the crankcase will plug it in hours.
Most people connect thier crankcase breather to the air cleaner lid or base.
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Starbucket
Samba Member
Joined: April 30, 2007
Posts: 4026
Location: WA
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| Posted: Sat Feb 17, 2018 3:34 pm Post subject: Re: Oil Breather |
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| If the carbs are from China the 1st thing is to remove the tops and look for shavings/other crud and maybe blow out the passages. |
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RossM96
Samba Member
Joined: September 25, 2017
Posts: 33
Location: San Diego
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| Posted: Sat Feb 17, 2018 3:43 pm Post subject: Re: Oil Breather |
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Fortunately these are Spanish Webers so we are clear of Chinese junk.
Busdaddy that’s what the Kadrons I took off did. So I should drill and tap a hole in my air cleaner base for it? What exactly does the oil breather do, and do I NEED it for a few days of driving before I have the means to machine my air cleaner bases?
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busdaddy
Samba Member
Joined: February 12, 2004
Posts: 51152
Location: Surrey B.C. Canada, but thinking of Ukraine
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| Posted: Sat Feb 17, 2018 4:58 pm Post subject: Re: Oil Breather |
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The breather allows combustion gases, water condensation and oil mist to get out of the crankcase, it also breathes in air when the engine cools. You can run it a couple days with the hose aimed overboard, but the longer you leave it the more oil mist goes through the fan to make a place for dust to stick in the cooling system.
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RossM96
Samba Member
Joined: September 25, 2017
Posts: 33
Location: San Diego
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| Posted: Sat Feb 17, 2018 5:14 pm Post subject: Re: Oil Breather |
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Thanks for the knowledge! Is it really not bad for the engine to draw oil mist through the carbs??
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spanky324
Samba Member
Joined: September 28, 2006
Posts: 1070
Location: Greeley Pa
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| Posted: Sat Feb 17, 2018 5:17 pm Post subject: Re: Oil Breather |
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| Talk to John the guy you got them from he will point you in the right direction |
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Wildthings
Samba Member
Joined: March 13, 2005
Posts: 50352
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| Posted: Sat Feb 17, 2018 5:33 pm Post subject: Re: Oil Breather |
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| RossM96 wrote: |
| Thanks for the knowledge! Is it really not bad for the engine to draw oil mist through the carbs?? |
Positive crankcase ventilation has probably done more to increase engine life than any other automotive improvement over the last 60 years. Had lead not been taken out of the fuel and crankcase ventilation improved modern high output engines just would not be possible.
Adding improved crankcase ventilation to vehicles also made roads much safer, especially in the rain. Draft tubes used leave a nasty oily strip down the middle of each lane which when wet could give severely reduce traction.
It is important that the hose(s)s between the breather and the air filter(s) have sufficient slope so that any engine snot that forms in them will drain back into the engine. |
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SGKent 
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Joined: October 30, 2007
Posts: 41031
Location: Citrus Heights CA (Near Sacramento)
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| Posted: Sat Feb 17, 2018 6:27 pm Post subject: Re: Oil Breather |
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either run it to the top of one or both carbs, or into a catch can. Either you will oil up the inside of the carbs or the engine bay, take your pick.
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lil-jinx
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Joined: August 14, 2013
Posts: 1109
Location: New Brunswick,Canada
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aeromech
Samba Member
Joined: January 24, 2006
Posts: 16971
Location: San Diego, California
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| Posted: Sat Feb 17, 2018 8:02 pm Post subject: Re: Oil Breather |
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I’ve got several pictures to illustrate to you how to do this. Problem is right now I’m so fucking sore from my garage today that I don’t want to get off my ass at the moment and go to my desktop computer. Maybe in the morning.
Basically run a hose from you breather box to the right side carb lid which you’ll install a fitting into
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busdaddy
Samba Member
Joined: February 12, 2004
Posts: 51152
Location: Surrey B.C. Canada, but thinking of Ukraine
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| Posted: Sat Feb 17, 2018 8:16 pm Post subject: Re: Oil Breather |
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| aeromech wrote: |
| I’ve got several pictures to illustrate to you how to do this. Problem is right now I’m so fucking sore from my garage today that I don’t want to get off my ass at the moment and go to my desktop computer. Maybe in the morning. |
What a snowflake, should we start a Gofundme so you can buy yourself a power chair?  
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Rust NEVER sleeps and stock never goes out of style.
Please don't PM technical questions, ask your problem in public so everyone can play along. If you think it's too stupid post it here
Stop dead photo links! Post your photos to The Samba Gallery!
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aeromech
Samba Member
Joined: January 24, 2006
Posts: 16971
Location: San Diego, California
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| Posted: Sat Feb 17, 2018 8:21 pm Post subject: Re: Oil Breather |
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I used to like you Mark😅
I’m 60, give me back 10 years and I won’t bitch
I installed this today
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound
Last edited by aeromech on Sat Feb 17, 2018 9:05 pm; edited 2 times in total |
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rastomas
Samba Member
Joined: April 05, 2007
Posts: 258
Location: rosendale, ny
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| Posted: Sat Feb 17, 2018 8:48 pm Post subject: Re: Oil Breather |
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Shit I meant the air cleaner. Sorry.
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"It's not 'You are what you eat', it's 'You are what you don't SHIT". Wavy Gravy.
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aeromech
Samba Member
Joined: January 24, 2006
Posts: 16971
Location: San Diego, California
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| Posted: Sat Feb 17, 2018 9:02 pm Post subject: Re: Oil Breather |
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_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound |
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RossM96
Samba Member
Joined: September 25, 2017
Posts: 33
Location: San Diego
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| Posted: Sat Feb 17, 2018 9:55 pm Post subject: Re: Oil Breather |
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Thanks everyone, you’re the best source of info. Any reason why the right carb is used for the breather?
Gary thanks a ton for those photos they helped a lot! I drill/tap holes early this week.
I got through most of the installation today but my old fuel fittings aren’t compatible with the Weber fitting threads so tomorrow will be coming up with new fuel delivery from the firewall back, and then setting up the linkage and tuning the carbs. I can’t wait to feel how much better my bus runs!
Pertronix SVDA distributor and coil coming later in the week!
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aeromech
Samba Member
Joined: January 24, 2006
Posts: 16971
Location: San Diego, California
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| Posted: Sat Feb 17, 2018 10:01 pm Post subject: Re: Oil Breather |
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Convinience
_________________
Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound |
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RossM96
Samba Member
Joined: September 25, 2017
Posts: 33
Location: San Diego
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| Posted: Sat Feb 17, 2018 10:10 pm Post subject: Re: Oil Breather |
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Sounds good to me.
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udidwht
Samba Member
Joined: March 06, 2005
Posts: 3779
Location: Seattle, WA./ HB, Ca./ Shizuoka, Japan
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| Posted: Sun Feb 18, 2018 2:52 pm Post subject: Re: Oil Breather |
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Filter on the end. |
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