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Nathc23 Samba Member
Joined: October 25, 2017 Posts: 7 Location: Vancouver BC
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Posted: Wed Oct 25, 2017 1:57 pm Post subject: Oil in the Carburetor from the oil breather |
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I have a 1974 Type 2 bus and recently she was struggling to start in the mornings. We were on a road trip down the west coast of the State sand so some days driving for 6 hours or so.
I took the top off the carb and noticed a fair amount of oil. After cleaner this out with a paper towel she started first time no problem. I have a hose coming from the Oil Breather which connects direct into the carburetor. Any advice on why oil is coming in and how I can fix it? |
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Xevin Samba Member
Joined: January 08, 2014 Posts: 7624
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Posted: Wed Oct 25, 2017 2:04 pm Post subject: Re: Oil in the Carburetor from the oil breather |
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Would that be a Weber progressive carburetor? How about some details on your setup. A picture of engine compartment could help as well. _________________ Keep on Busin'
67rustavenger wrote: |
GFY's Xevin and VW_Jimbo! |
Clatter wrote: |
Damn that Xevin... |
skills@eurocarsplus wrote: |
I respect Xevin and he's a turd |
SGKent wrote: |
My God! Xevin and I 100% agree |
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Nathc23 Samba Member
Joined: October 25, 2017 Posts: 7 Location: Vancouver BC
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Posted: Wed Oct 25, 2017 2:36 pm Post subject: Re: Oil in the Carburetor from the oil breather |
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The pictures show the oil breather and the hose that connects into the carburetor. I have lifted the top off the breather and there is nothing in there so not sure if I require foam (?) or something in there to control the oil? I have tried tightening the white connection that goes into the carburetor but it didn't work.
Any help would be grand as I am a bit of a newbie with these. |
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Xevin Samba Member
Joined: January 08, 2014 Posts: 7624
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Posted: Wed Oct 25, 2017 3:06 pm Post subject: Re: Oil in the Carburetor from the oil breather |
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Excellent pics. When you say trouble starting in the mornings. Describe what was happening. Did the engine turn over? Did it feel like you were starved for gas? Did nothing happen when you turn key to start? And then the starter engaged and started to crank. Do you have a faint gas smell inside bus. Does your engine bay have a strong smell of gas. Lots of questions coming your way.
Unrelated:
Do you have the black fan that hangs from the top of the engine compartment with hose going down. Can you see the road anywhere when you look down engine compartment towards the ground? _________________ Keep on Busin'
67rustavenger wrote: |
GFY's Xevin and VW_Jimbo! |
Clatter wrote: |
Damn that Xevin... |
skills@eurocarsplus wrote: |
I respect Xevin and he's a turd |
SGKent wrote: |
My God! Xevin and I 100% agree |
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Nathc23 Samba Member
Joined: October 25, 2017 Posts: 7 Location: Vancouver BC
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Posted: Wed Oct 25, 2017 3:14 pm Post subject: Re: Oil in the Carburetor from the oil breather |
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So it sounds like it is trying to turn over. After about 10 seconds it kicks in and starts. I have to keep the revs high for a while otherwise it cuts out. After starting off it would sometimes cut out when I came to a stop. Although if I have got rid of the oil in the carburetor it starts straight away and runs perfectly fine.
No gas smell except after I have filled her up and then it disappears after a few miles.
No I don't have the air blower in the van. It is on my list of things to replace ( heater boxes, hoses and the fan and get that all working correctly) |
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Starbucket Samba Member
Joined: April 30, 2007 Posts: 4025 Location: WA
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Posted: Wed Oct 25, 2017 3:18 pm Post subject: Re: Oil in the Carburetor from the oil breather |
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Disconnect that hose and start the motor and watch for a lot of blowby. That's where the oil is coming from as the blowby condenses as the cold incoming air goes down the carb. Might be time for new rings. |
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Nathc23 Samba Member
Joined: October 25, 2017 Posts: 7 Location: Vancouver BC
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Posted: Wed Oct 25, 2017 3:23 pm Post subject: Re: Oil in the Carburetor from the oil breather |
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Disconnect the hose going into the carb? Excuse my ignorance but new rings where?! I'm still learning... |
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SGKent Samba Member
Joined: October 30, 2007 Posts: 41031 Location: Citrus Heights CA (Near Sacramento)
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Posted: Wed Oct 25, 2017 3:34 pm Post subject: Re: Oil in the Carburetor from the oil breather |
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is the problem you want to know about the oil, or is the problem starting it, or both. They aren't related unless the timing is so far off it is causing excessive blowby, or the the compression is low, or there is gas in the oil.
I would suggest treating them separately. To find out why it won't start, check the timing, points and plug gap. It could be the timing has changed. Check the automatic choke on the carb to be sure it is working properly. check for vacuum leaks. _________________ “Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin |
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Starbucket Samba Member
Joined: April 30, 2007 Posts: 4025 Location: WA
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Posted: Wed Oct 25, 2017 3:42 pm Post subject: Re: Oil in the Carburetor from the oil breather |
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Nathc23 wrote: |
Disconnect the hose going into the carb? Excuse my ignorance but new rings where?! I'm still learning...
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Piston rings. That can be determined with a compression test among others. Look for oily spark plugs a sure sign of trouble somewhere. |
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Wildthings Samba Member
Joined: March 13, 2005 Posts: 50338
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Posted: Wed Oct 25, 2017 3:56 pm Post subject: Re: Oil in the Carburetor from the oil breather |
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Having oil sitting in the bottom of your air cleaner isn't going to hurt much, the oil come via the breather and then just sits in the bottom of the air cleaner looking ugly but actually being pretty inert. If you don't like the mess you can direct the oil into the top of the air clean directly above the primary throat of the carburetor. This way the oil will go right back into the engine.
I suspect your choke isn't working and when you messed with the carb you knocked it free. Have you been pumping the gas pedal one full stroke before trying to cold start your engine? Two strokes may be needed as the temperature drops towards freezing, plus additional strokes as the temperature drops further down. |
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Xevin Samba Member
Joined: January 08, 2014 Posts: 7624
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Posted: Wed Oct 25, 2017 4:44 pm Post subject: Re: Oil in the Carburetor from the oil breather |
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Yes what Wildthings says. I'm going to lob this out there. Could it be flooding and then when it sits as he's cleaning up the oil with the air cleaner off the carb is realeasing gas enabling it to start again Next time it happens press the
Gas pedal all the way down and then turn the key to start. With foot still on pedal. _________________ Keep on Busin'
67rustavenger wrote: |
GFY's Xevin and VW_Jimbo! |
Clatter wrote: |
Damn that Xevin... |
skills@eurocarsplus wrote: |
I respect Xevin and he's a turd |
SGKent wrote: |
My God! Xevin and I 100% agree |
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Terminatez Samba Member
Joined: June 07, 2015 Posts: 340 Location: Sun Valley, CA
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Posted: Wed Oct 25, 2017 7:59 pm Post subject: Re: Oil in the Carburetor from the oil breather |
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Wildthings wrote: |
Having oil sitting in the bottom of your air cleaner isn't going to hurt much, the oil come via the breather and then just sits in the bottom of the air cleaner looking ugly but actually being pretty inert. If you don't like the mess you can direct the oil into the top of the air clean directly above the primary throat of the carburetor. This way the oil will go right back into the engine.
I suspect your choke isn't working and when you messed with the carb you knocked it free. Have you been pumping the gas pedal one full stroke before trying to cold start your engine? Two strokes may be needed as the temperature drops towards freezing, plus additional strokes as the temperature drops further down. |
Well this saved me a search. I'm about to connect my oil breather to my dual webers and was wondering what area would work or if anywhere is ok. _________________ 1972 Westfalia P30 hardtop Campmobile [On-going Restoration]
aeromech wrote: |
I don't think I've ever seen an engine in worse shape. |
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airschooled Air-Schooled
Joined: April 04, 2012 Posts: 12721 Location: on a bike ride somewhere
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Posted: Wed Oct 25, 2017 8:02 pm Post subject: Re: Oil in the Carburetor from the oil breather |
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Be aware that the plastic 90 degree fitting shown in the photo above contains a restrictive profile inside, shrinking the 1/2 inch breather tube to a quarter inch passage. This may cause excess crankcase pressure and extra oil leaks out other places.
Robbie _________________ Learn how your vintage VW works. And why it doesn't!
One-on-one tech help for your Volkswagen:
www.airschooled.com |
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Wildthings Samba Member
Joined: March 13, 2005 Posts: 50338
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Posted: Wed Oct 25, 2017 8:43 pm Post subject: Re: Oil in the Carburetor from the oil breather |
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You have a vacuum line hooked up to the vacuum retard side of the can on your distributor. Since your aftermarket carb was not designed to work with a retard feature, most people only hook of the advance side of the can. Don't know where the hose is attached to on the other end, but it is probably not helping you much and may actually be hurting your performance. |
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aeromech Samba Member
Joined: January 24, 2006 Posts: 16961 Location: San Diego, California
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Posted: Wed Oct 25, 2017 8:54 pm Post subject: Re: Oil in the Carburetor from the oil breather |
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Good catch Jim.
To the O P. If you want to eliminate the breather oil as being the cause, disconnect the hose from the air cleaner and just run it overboard. That’s the way the old VW’s did it before pollution concerns. See if that helps. _________________ 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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Wildthings Samba Member
Joined: March 13, 2005 Posts: 50338
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Posted: Wed Oct 25, 2017 9:04 pm Post subject: Re: Oil in the Carburetor from the oil breather |
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Terminatez wrote: |
Wildthings wrote: |
Having oil sitting in the bottom of your air cleaner isn't going to hurt much, the oil come via the breather and then just sits in the bottom of the air cleaner looking ugly but actually being pretty inert. If you don't like the mess you can direct the oil into the top of the air clean directly above the primary throat of the carburetor. This way the oil will go right back into the engine.
I suspect your choke isn't working and when you messed with the carb you knocked it free. Have you been pumping the gas pedal one full stroke before trying to cold start your engine? Two strokes may be needed as the temperature drops towards freezing, plus additional strokes as the temperature drops further down. |
Well this saved me a search. I'm about to connect my oil breather to my dual webers and was wondering what area would work or if anywhere is ok. |
Going into the top will also give more slope to the hose so the oily water in the hose will drain back into the engine after shutdown verse plugging the hose with engine snot. |
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Nathc23 Samba Member
Joined: October 25, 2017 Posts: 7 Location: Vancouver BC
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Posted: Mon Oct 30, 2017 11:53 am Post subject: Re: Oil in the Carburetor from the oil breather |
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Thank you for all your help. I'm going to get round to looking at it this weekend and see what I can do. |
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Wildthings Samba Member
Joined: March 13, 2005 Posts: 50338
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Posted: Mon Oct 30, 2017 12:03 pm Post subject: Re: Oil in the Carburetor from the oil breather |
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I just used a hardware store grommet and the nylon pipe to hose elbow with the pipe threads pressed down into the gromment. Haven't had mine set up this way for long, but it seems to work fine.
Sorry for the fuzzy picture.
. |
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